Parametric Technology Corporation U00251094 ELECTRICAL SYMBOL LIBRARY ™ Catalog Pro/ENGINEER ®
Parametric Technology Corporation
U00251094
ELECTRICAL SYMBOLLIBRARY ™ Catalog
Pro/ENGINEER®
COPYRIGHT 1989-1994 PARAMETRIC TECHNOLOGY CORPORATION. ALL RIGHTS RESERVED.
This ELECTRICAL SYMBOL LIBRARYTM Catalog may not be copied, reproduced, disclosed, transferred, orreduced to any form, including electronic medium or machine-readable form, or transmitted or publicly performedby any means, electronic or otherwise, unless Parametric Technology consents in writing in advance.
Use of the software has been provided under a Software License Agreement.
Information described in this manual is furnished for information only, is subject to change without notice, andshould not be construed as a commitment by Parametric Technology Corporation. Parametric Technology assumesno responsibility or liability for any errors or inaccuracies that may appear in this manual.
The software contains valuable trade secrets and proprietary information and is protected by United States copyrightlaws and copyright laws of other countries. Unauthorized use of the software or its documentation can result in civildamages and criminal prosecution.
Pro/ENGINEER is a registered trademark and Pro/ASSEMBLY, Pro/CABLING, Pro/CASTING, Pro/CAT,Pro/CDT, Pro/COMPOSITE, Pro/DESIGN, Pro/DETAIL, Pro/DEVELOP, Pro/DIAGRAM, Pro/DIEFACE,Pro/DRAW, Pro/ECAD, Pro/FEATURE, Pro/FEM-POST, Pro/HARNESS-MFG, Pro/INTERFACE,Pro/LANGUAGE, Pro/LEGACY, Pro/LIBRARYACCESS, Pro/MANUFACTURING, Pro/MESH,Pro/MOLDESIGN, Pro/NC-CHECK, Pro/PDM, Pro/PIPING, Pro/PLOT, Pro/REPORT, Pro/REVIEW,Pro/SCAN-TOOLS, Pro/SHEETMETAL, Pro/STEP-INTERFACE, Pro/SURFACE are trademarks of ParametricTechnology Corporation in the United States and other countries.
All other company and product names are trademarks or registered trademarks of their respective owners.
Parametric Technology Corporation128 Technology DriveWaltham, MA 02154(617) 398-5000
Order Number DU-0025.Printed in U.S.A.
PRINTING HISTORY
Document Number Date Description
U00251094 10/06/94 New ELECTRICAL SYMBOL LIBRARYTM Catalog
PREFACE
The Pro/ENGINEER User Guides describe all of Pro/ENGINEER’s functionality and how itis used. They have common structure and style conventions, described below.
The manuals are designed with two purposes in mind:• To help you quickly learn to make productive use of Pro/ENGINEER• To describe the more advanced uses of the system
It has been assumed that you are familiar with your workstation, and have some knowledge ofyour operating system.
Pro/ENGINEER DOCUMENTATION
Documentation is divided into several manuals which together comprise a comprehensive guideto Pro/ENGINEER. Each manual deals with a major function of the software, and you can usu-ally find which manual you need by first looking at the title. If not, there are indices correspond-ing to each book, and there is also a Master Indices that indexes the entire Pro/ENGINEER doc-ument family.
A complete list of Pro/ENGINEER user guides can be found in Chapter 1 of the “Fundamentalsof Pro/ENGINEER”.
USING THESE MANUALS
To find information in the manuals quickly, become familiar with the aids provided:Table of Contents - A Table of Contents is provided at the beginning of each document
with all chapter titles and the section headings of each chapter. Use theTable of Contents to familiarize yourself with the layout of eachdocument.
Labels - Interspersed along the left side of pages are labels. They are forlocating information within a general section of the Guide by quicklyscanning the column.
Bleeding Tabs - Chapter headings, on bleeding tabs, are on the right side of each page.These help you quickly locate a particular chapter of the document.
Indices - Indices containing Pro/ENGINEER commands and keywords areprovided for every document.
Master Indices - A master index of commands and keywords is provided showing thedocument and page number where the item is located.
CONVENTIONS
In order to clarify the discussion of various topics, the following conventions have been em-ployed throughout all the manuals:
Boldface Type indicates a menu option (Part). However, only when the namerefers to the actual option will it appear in bold type.
UPPERCASE Indicates the name of a menu (PART).
[Bolt] When you need to enter information using the keyboard, it will appear[between two brackets in courier font likethis] . Type everything between the square brackets exactly asshown.
<CR> Words between the <> symbol indicate the name of a keyboard key.Reference When referencing other sections of the document, it will appear in
italics like this.Emphasis When something is being emphasized, it will appear inbold italics like
this.
NOTE: Important information that should not be overlooked willappear in notes like this.
All mouse clicks assume that the mouse has been configured as right-handed.
COMMON TERMS
There are a few very important terms that are used frequently in the User Guide; they are definedhere. A full glossary of Pro/ENGINEER terms appears in Appendix B of “Fundamentals ofPro/ENGINEER”.
Choose - Select a menu option by placing the arrow cursor on the option, andwhen it is highlighted, pressing the left mouse button.
Mode - An environment in which Pro/ENGINEER allows you to perform acertain group of closely related functions (e.g. Drawing).
Model - A part or an assembly.Object - An assembly, part, drawing, format, layout, case study, sketch, etc.Pick - Select an item on the screen by clicking the left mouse button.
TABLE OF CONTENTS
Electrical Symbol Library i
ABOUT THE ELECTRICAL SYMBOL LIBRARY......................................................... 1-1USING THIS CATALOG.............................................................................................. 1-1USING THE LIBRARY ................................................................................................ 1-1
QUALIFYING SYMBOLS ................................................................................................... 2-1ELEMENTS .............................................................................................................. 2-1
ADJASTABILITY AND VARIABILITY .......................................................... 2-1SPECIAL PROPERTY INDICATOR ................................................................ 2-1RADIATION ....................................................................................................... 2-2TEST POINT ....................................................................................................... 2-2FLOW DIRECTION ........................................................................................... 2-2CURRENT .......................................................................................................... 2-2CONNECTION ................................................................................................... 2-2SPECIAL CONNECTOR ................................................................................... 2-3ELECTRET ......................................................................................................... 2-3SIGNAL WAVEFORMS .................................................................................... 2-4
FUNDAMENTAL ITEMS .................................................................................................... 3-1APPLICATIONS ...................................................................................................... 3-1
RESISTOR .......................................................................................................... 3-1CAPACITOR ...................................................................................................... 3-2ATTENTUATOR ................................................................................................ 3-2BATTERY .......................................................................................................... 3-2DELAY ............................................................................................................... 3-3OSCILLATOR .................................................................................................... 3-3PERMANENT MAGNET .................................................................................. 3-3PICKUP HEAD ................................................................................................... 3-3PIEZOELECTRIC .............................................................................................. 3-4SQUIB ................................................................................................................. 3-4THERMOCOUPLE ............................................................................................ 3-4THERMAL ELEMENT ...................................................................................... 3-4FIRE DETECTOR .............................................................................................. 3-4IGNITOR ............................................................................................................ 3-4
CONTACTS, SWITCHES, CONTACTORS, RELAYS.................................................... 4-1ELEMENTS .............................................................................................................. 4-1APPLICATIONS ...................................................................................................... 4-1
BASIC ................................................................................................................. 4-1CONTACTOR .................................................................................................... 4-4FLASHER ........................................................................................................... 4-4FLOW-ACTIVATED SWITCH ......................................................................... 4-5FOOT-OPERATED SWITCH ............................................................................ 4-5LIQUID-LEVEL-ACTUATED SWITCH .......................................................... 4-5MAGNETIC BLOWOUT COIL ........................................................................ 4-5MERCURY SWITCH ......................................................................................... 4-5PRESSURE-ACTUATED SWITCH .................................................................. 4-5
TABLE OF CONTENTS
ii Electrical Symbol Library
RELAY ............................................................................................................... 4-6RELAY COIL ..................................................................................................... 4-6SAFETY INTERLOCK ...................................................................................... 4-6SPECIFIC SWITCH ........................................................................................... 4-6SWITCH ............................................................................................................. 4-7TEMPERATURE-ACTUATED SWITCH ...................................................... 4-10THERMOSTAT ................................................................................................ 4-10TIME-DELAY SWITCH .................................................................................. 4-10
TERMINALS AND CONNECTORS ...................................................................................5-1APPLICATIONS ...................................................................................................... 5-1
CONNECTOR .................................................................................................... 5-1JACK AND PLUG ............................................................................................. 5-1WAVEGUIDE FLANGE ................................................................................... 5-1
TRANSFORMERS, INDUCTORS, AND WINDINGS ......................................................6-1ELEMENTS ............................................................................................................. 6-1APPLICATIONS ...................................................................................................... 6-1
FERRITE CORE ................................................................................................. 6-1INDUCTOR ........................................................................................................ 6-1MAGNETIC STORAGE .................................................................................... 6-2TRANSDUCTOR ............................................................................................... 6-2TRANSFORMER ............................................................................................... 6-2
ELECTRON TUBES AND RELATED DEVICES .............................................................7-1ELEMENTS ............................................................................................................. 7-1
COLLECTING AND EMITTING ELECTRODE ............................................. 7-1COLLECTING ELECTRODE ........................................................................... 7-1CONTROLLING ELECTRODE ........................................................................ 7-1COUPLING ........................................................................................................ 7-2EMITTING ELECTRODE ................................................................................. 7-2HEATED CATHODE ........................................................................................ 7-2MICROWAVE TUBE ........................................................................................ 7-3STORAGE ELECTRODE .................................................................................. 7-3
APPLICATIONS ...................................................................................................... 7-3GENERAL .......................................................................................................... 7-3X-RAY TUBE .................................................................................................... 7-4CATHODE-RAY TUBE .................................................................................... 7-5MERCURY-POOL TUBE .................................................................................. 7-5NUCLEAR-RADIATION DETECTOR ............................................................ 7-6
SEMICONDUCTOR DEVICES ...........................................................................................8-1ELEMENTS ............................................................................................................. 8-1APPLICATIONS ...................................................................................................... 8-2
TWO-TERMINAL ............................................................................................. 8-2THREE-TERMINAL .......................................................................................... 8-3
GENERAL .................................................................................................... 8-3
TABLE OF CONTENTS
Electrical Symbol Library iii
RADIATION DETECTOR .......................................................................... 8-4THYRISTOR ................................................................................................ 8-4TRANSISTOR .............................................................................................. 8-5
CIRCUIT PROTECTORS.................................................................................................... 9-1ELEMENTS .............................................................................................................. 9-1APPLICATIONS ...................................................................................................... 9-1
LIGHTNING ARRESTER ................................................................................. 9-1CIRCUIT BREAKER ......................................................................................... 9-1FUSE ................................................................................................................... 9-2RELAY ................................................................................................................ 9-2
ACOUSTIC DEVICES........................................................................................................ 10-1APPLICATIONS .................................................................................................... 10-1
LAMPS AND VISUAL-SIGNALING DEVICES............................................................. 11-1APPLICATIONS .................................................................................................... 11-1
LAMP ................................................................................................................ 11-1VISUAL DEVICE ............................................................................................. 11-1
READOUT DEVICES......................................................................................................... 12-1APPLICATIONS .................................................................................................... 12-1
COUNTING DEVICE ...................................................................................... 12-1INDICATING INSTRUMENT ......................................................................... 12-1INTEGRATING INSTRUMENT ..................................................................... 12-2METER INSTRUMENT ................................................................................... 12-3RECORDING INSTRUMENT ......................................................................... 12-3TELEMETERING DEVICE ............................................................................. 12-3
ROTATING MACHINERY................................................................................................ 13-1ELEMENTS ............................................................................................................ 13-1APPLICATIONS .................................................................................................... 13-2
DIRECT CURRENT MACHINE ..................................................................... 13-2ALTERNATING CURRENT MACHINE ....................................................... 13-5PHASE SHIFTER ............................................................................................. 13-7DC FIELD EXCITATION ................................................................................ 13-7COMPOSITE .................................................................................................... 13-8SYNCHRO ........................................................................................................ 13-8
MECHANICAL FUNCTIONS ........................................................................................... 14-1ELEMENTS ............................................................................................................ 14-1APPLICATIONS .................................................................................................... 14-1
CLUTCH AND BRAKE ................................................................................... 14-1MANUAL CONTROL ..................................................................................... 14-1DETENT ........................................................................................................... 14-3
VHF, UHF, AND SHF CIRCUITS.................................................................................... 15-1ELEMENTS ............................................................................................................ 15-1
TABLE OF CONTENTS
iv Electrical Symbol Library
APPLICATIONS .................................................................................................... 15-1FILTER ............................................................................................................. 15-1MAGNETRON ................................................................................................. 15-2RESONATOR ................................................................................................... 15-2TRANSMIT-RECEIVE TUBE ........................................................................ 15-2LASER .............................................................................................................. 15-3NONRECIPROCAL DEVICE ......................................................................... 15-3TRAVELLING WAVE TUBE ......................................................................... 15-3VELOCITY MODULATION TUBE ............................................................... 15-6
COMPOSITE ASSEMBLIES .............................................................................................16-1ELEMENTS ........................................................................................................... 16-1APPLICATIONS .................................................................................................... 16-1
AMPLIFIER ..................................................................................................... 16-1CHANGER ....................................................................................................... 16-2CHOPPER ......................................................................................................... 16-2FIRE EXTINGUISHER .................................................................................... 16-2GENERATOR .................................................................................................. 16-2GYRO ............................................................................................................... 16-3PHASE SHIFTER ............................................................................................. 16-3POSITION INDICATOR ................................................................................. 16-3RECTIFIER ...................................................................................................... 16-3REPEATER ...................................................................................................... 16-4RING MODULATOR ...................................................................................... 16-4SENSOR AND DETECTOR ............................................................................ 16-4
ANALOG AND DIGITAL LOGIC FUNCTIONS............................................................17-1ELEMENTS ........................................................................................................... 17-1APPLICATIONS .................................................................................................... 17-1
AMPLIFIER ..................................................................................................... 17-1ANALOG COMPUTATION DEVICE ............................................................ 17-1
AMPLIFIER ............................................................................................... 17-1COEFFICIENT SCALER .......................................................................... 17-2COORDINATE CONVERTER ................................................................. 17-2ELECTRONIC SWITCH ........................................................................... 17-2FUNCTION GENERATOR ....................................................................... 17-3SIGNAL CONVERTER ............................................................................. 17-3
MULTIPLIER AND DIVIDER ........................................................................ 17-3
MAINTENANCE SYMBOLS .............................................................................................18-1APPLICATIONS .................................................................................................... 18-1
FLOW SIGNAL ................................................................................................ 18-1FUNCTIONAL CIRCUIT ................................................................................ 18-1
Electrical Symbol Library 1 - 1
1ABOUT THE ELECTRICAL SYMBOL LIBRARY
The Electrical Symbol Library is a collection of commonly used electrical symbols for use inelectrical schematic diagrams.
USING THIS CATALOG
This document contains illustrations documenting all the ElectricalLibrary symbols, and all the information necessary to find anysymbol. To locate a specific symbol:
1. Determine the type of symbol and locate its chapter in the Tableof Contents.
2. Turn to that chapter and locate the symbol.
USING THE LIBRARY
For information on using the ELECTRICAL SYMBOL Library, referto “THE ELECTRICAL SYMBOL LIBRARY” chapter in the“INTRODUCTION TO THE LIBRARIES” manual.
[ THIS PAGE LEFT INTENTIONALLY BLANK ]
Electrical Symbol Library 2 - 1
3QUALIFYING SYMBOLS
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
ADJASTABILITY AND VARIABILITY
Adjustability,general
QUAV01
Adjustability,preset
QUAV02
Adjustability, lin-ear
QUAV03
Adjustability,nonlinear
QUAV04
Inherent variabil-ity, linear
QUAV05
Inherent variabil-ity, nonlinear
QUAV06
Adjustability,continuous
QUAV07
Adjustability, insteps
QUAV08
Adjustability,preset, continu-ous
QUAV09
Adjustability,preset, in steps
QUAV10
Adjustability,automatic (inher-ent) control
QUAV11
SPECIAL PROPERTY INDICATOR
Special-propertyindicator, temper-ature dependence
QUPI01
Special-propertyindicator, mag-netic field depen-dence
QUPI02
Special-propertyindicator, storage(Greek letter tau)
QUPI03
Saturable proper-ties, general
QUPI04
Saturable proper-ties, delay
QUPI05
Saturable proper-ties, thermaleffect
QUPI06
Saturable proper-ties, electromag-netic effect
QUPI07
DESCRIPTION SYMBOLSYMBOL
NAME
QUALIFYING SYMBOLS
2 - 2 Electrical Symbol Library
Saturable proper-ties, magneto-strictive effect
QUPI08
RADIATION
Radiation, non-ionizing
QURI01
Radiation, ioniz-ing
QURI02
Coherent radia-tion, ionizing
QURI03
TEST POINT
Test-point recog-nition, general
QUTP01
FLOW DIRECTION
Direction of flowof Power, Signalor Information,one-way
QUFD01
Direction of flowof Power, Signalor Information,either way (butnot simulta-neously)
QUFD02
Direction of flowof Power, Signalor Information,both ways simul-taneously
QUFD03
CURRENT
Alternating cur-rent
QUCU02
DESCRIPTION SYMBOLSYMBOL
NAME
Alternating cur-rent, audio fre-quencies
QUCU03
Alternating cur-rent, superaudio,carrier, and radiofrequencies
QUCU04
Current, direct oralternating (uni-versal)
QUCU05
Current, undulat-ing or rectified
QUCU06
CONNECTION
Connection sym-bol, 2-phase 3wire, ungrounded
QUCO01
Connection sym-bol, 2-phase 3-wire, grounded
QUCO02
Connection sym-bol, 2-phase 4wire
QUCO03
Connection sym-bol, 2-phase 5wire, grounded
QUCO04
Connection sym-bol, 3-phase 3wire, delta ormesh
QUCO05
Connection sym-bol, 3-phase 3wire, delta,grounded
QUCO06
DESCRIPTION SYMBOLSYMBOL
NAME
QUALIFYING SYMBOLS
Electrical Symbol Library 2 - 3
Connection sym-bol, 3-phase 4wire, delta,ungrounded
QUCO07
Connection sym-bol, 3-phase 4wire, delta,grounded
QUCO08
Connection sym-bol, 3-phase,open delta
QUCO09
Connection sym-bol, 3-phase,open delta,grounded at com-mon point
QUCO10
Connection sym-bol, 3-phase,open delta,grounded at mid-dle point of onewinding
QUCO11
Connection sym-bol, 3-phase, bro-ken delta
QUCO12
Connection sym-bol, 3-phase, wyeor star,ungrounded
QUCO13
Connection sym-bol, 3-phase,wye, groundedneutral
QUCO14
Connection sym-bol, 3-phase 4wire, ungrounded
QUCO15
Connection sym-bol, 3-phase zig-zag, ungrounded
QUCO16
DESCRIPTION SYMBOLSYMBOL
NAME
Connection sym-bol, 3-phase zig-zag, grounded
QUCO17
Connection sym-bol, 3-phase,Scott or T
QUCO18
Connection sym-bol, 6-phase, dou-ble delta
QUCO19
Connection sym-bol, 6-phase hex-agonal (orchordal)
QUCO20
Connection sym-bol, 6-phase star(or diametrical)
QUCO21
Connection sym-bol, 6-phase, star,with groundedneutral
QUCO22
Connection sym-bol, 6-phase dou-ble zigzag withneutral broughtout and grounded
QUCO23
SPECIAL CONNECTOR
Special connec-tor or cable indi-cator
QUSC01
ELECTRET
Electret (shownwith electrodes)
QUEL01
DESCRIPTION SYMBOLSYMBOL
NAME
QUALIFYING SYMBOLS
2 - 4 Electrical Symbol Library
SIGNAL WAVEFORMS
Signal wave-forms, positive-going pulse
QUSW01
Signal wave-forms, negative-going pulse
QUSW02
Signal wave-forms, pulse ofalternating cur-rent
QUSW03
Signal wave-forms, positive-going step func-tion
QUSW04
Signal wave-forms, negative-going step func-tion
QUSW05
Signal wave-forms, sawtooth
QUSW06
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 3 - 1
3FUNDAMENTAL ITEMS
DESCRIPTION SYMBOLSYMBOL
NAME
APPLICATIONS
RESISTOR
Resistor, general FNRR01
Resistor, tapped FNRR02
Resistor, adjust-able contact
FNRR03
Resistor, adjust-able or continu-ously adjustable(variable)
FNRR04
Resistor, nonlin-ear
FNRR05
Symmetricalvaristor (intrin-sic), voltage sen-sitive resistor
FNRR06
Resistor, magne-toresistor (intrin-sic)
FNRR07
Resistor, instru-ment or relayshunt
FNRR08
Resistor, resistivetermination
FNRR09
Resistor, bolome-ter element
FNRR10
Resistor, ther-mistor, general
FNRR11
Resistor, ther-mistor, linear
FNRR12
Resistor, ther-mistor, nonlinear
FNRR13
Resistor, ther-mistor with inde-pendent integralheater
FNRR14
Resistor, symmet-rical photocon-ductive transducer
FNRR15
Resistor, shunt FNRR16
Resistor, ther-mistor, nonlinear,with independentintegral heater
FNRR17
DESCRIPTION SYMBOLSYMBOL
NAME
FUNDAMENTAL ITEMS
3 - 2 Electrical Symbol Library
CAPACITOR
Capacitor, general FNCC01
Capacitor, withidentified elec-trode
FNCC02
Capacitor, polar-ized
FNCC03
Capacitor, adjust-able or variable
FNCC04
Capacitor, contin-uously adjustableor variable differ-ential
FNCC05
Capacitor, phase-shifter
FNCC06
Capacitor, split-stator
FNCC08
Capacitor, feed-through
FNCC09
Capacitor, shuntcapacitor
FNCC10
DESCRIPTION SYMBOLSYMBOL
NAME
Capacitor bush-ing for circuitbreaker or trans-former
FNCC11
ATTENTUATOR
Attenuator, bal-anced, general
FNAT01
Attenuator, unbal-anced, general
FNAT02
Attenuator, vari-able balanced,general
FNAT03
Attenuator, vari-able unbalanced,general
FNAT04
BATTERY
Battery, one-cell FNBA01
Battery, multicell FNBA02
Battery, multicellwith three taps
FNBA03
Battery, multicellwith adjustabletap
FNBA04
DESCRIPTION SYMBOLSYMBOL
NAME
FUNDAMENTAL ITEMS
Electrical Symbol Library 3 - 3
DELAY
Delay function,element, general
FNDE01
Delay function,element, tapped
FNDE02
Delay function,variable delay ele-ment
FNDE03
Delay function,slow-wave struc-ture
FNDE04
Slow-wave struc-ture, open
FNDE05
Slow-wave struc-ture, open, singleelectrode for elec-trostatic focusing
FNDE06
Slow-wave struc-ture, closed, withenvelope
FNDE07
DESCRIPTION SYMBOLSYMBOL
NAME
OSCILLATOR
Oscillator FNOS01
PERMANENT MAGNET
Permanent mag-net
FNPM01
PICKUP HEAD
Pickup head, gen-eral
FNPH01
Pickup head, writ-ing, recording
FNPH02
Pickup head,reading, playback
FNPH03
Pickup head, eras-ing
FNPH04
Pickup head, writ-ing, reading anderasing
FNPH05
Pickup head, ste-reo
FNPH06
Pickup, stereo,stylus-operated
FNPH07
Pickup, light sen-sitive reproduc-ing (reading,playback) head,mono
FNPH08
DESCRIPTION SYMBOLSYMBOL
NAME
FUNDAMENTAL ITEMS
3 - 4 Electrical Symbol Library
PIEZOELECTRIC
Piezoelectriccrystal unit
FNPZ01
SQUIB
Squib, explosive FNSQ01
Squib, igniter FNSQ02
THERMOCOUPLE
Thermocouple,temperature mea-suring
FNTH01
Thermocouple,with integral insu-lated heater
FNTH02
Thermopile FNTH03
Thermocouplewith integralheater (internallyconnected)
FNTH04
THERMAL ELEMENT
Thermal element FNTE01
DESCRIPTION SYMBOLSYMBOL
NAME
FIRE DETECTOR
Continuous loopfire detector
FNFD01
IGNITOR
Ignitor plug FNIG01
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 4 - 1
3CONTACTS, SWITCHES, CONTACTORS, RELAYS
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
Electrical con-tact, fixed
CNEC01
Electrical con-tact, fixed withmomentary con-tact
CNEC02
Electrical con-tact, fixed, sleeve
CNEC03
Electrical con-tact, adjustable orsliding contact
CNEC04
Electrical con-tact, locking
CNEC05
Electrical con-tact, nonlocking
CNEC06
Electrical con-tact,segment,bridging contact
CNEC07
Electrical con-tact, vibrator reed
CNEC08
Electrical con-tact, vibrator splitreed
CNEC09
Electrical con-tact, rotating con-tact and brush
CNEC10
Switching func-tion, conductingclosed contact
CNSF01
Switching func-tion, nonconduct-ing, open contact
CNSF02
APPLICATIONS
BASIC
Basic contactassembly, closed
CNCN01
Contact, make,form 1
CNCN02
Contact, make,form 2
CNCN03
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
4 - 2 Electrical Symbol Library
Contact, break CNCN04
Contact, change-over break beforemake
CNCN05
Contact, two waycontact with cen-ter-off position
CNCN06
Contact,changeover makebefore break(bridging)
CNCN07
Contact, with twomakes
CNCN08
Contact, with twobreaks
CNCN09
DESCRIPTION SYMBOLSYMBOL
NAME
Basic contactassembly, open
CNCN10
Contact, passingmake contactclosing momen-tarily when itsoperation deviceis actuated
CNCN11
Contact, passingmake contactclosing momen-tarily when itsoperation deviceis released
CNCN12
Contact, passingmake contactclosing momen-tarily when itsoperation deviceis actuated orreleased
CNCN13
Contact, makecontact (of multi-ple contactassembly) whichis early to closerelative to othercontacts in assem-bly
CNCN14
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
Electrical Symbol Library 4 - 3
Contact, makecontact (of multi-ple contact assem-bly) which is lateto close relative toother contacts inassembly
CNCN15
Contact, makecontact (of multi-ple contact assem-bly) which is lateto close relative toother contacts inassembly
CNCN16
Contact, breakcontact (of multi-ple contact assem-bly) which is lateto open relativeto other contactsin assembly
CNCN17
Contact, breakcontact (of multi-ple contact assem-bly) which isearly to open rela-tive to other con-tacts in assembly
CNCN18
Basic contactassembly, makebefore break
CNCN19
Contact, inten-tional delay, makecontact delayedwhen closing(form 1)
CNCN20
DESCRIPTION SYMBOLSYMBOL
NAME
Contact, inten-tional delay, makecontact delayedwhen closing(form 2)
CNCN21
Contact, inten-tional delay, breakcontact delayedwhen reclosing(form 1)
CNCN22
Contact, inten-tional delay, breakcontact delayedwhen reclosing(form 2)
CNCN23
Contact, inten-tional delay, makecontact delayedwhen closing oropening
CNCN24
Basic contactassembly, opencontact with timeclosing (TC) ortime delay closing(TDC)
CNCN25
Contact, makecontact withspring return
CNCN26
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
4 - 4 Electrical Symbol Library
Contact, makecontact withoutspring return
CNCN27
Contact, breakcontact withspring return
CNCN28
Contact, two-waycontact with cen-ter-off positionwith spring returnfrom left-handposition, but notright-hand posi-tion
CNCN29
Basic contactassembly, closedcontact with timeopening (TO) ortime delay open-ing (TDO)
CNCN30
Basic contactassembly, timesequential closing
CNCN31
Basic contactassembly, twoposition switch
CNCN32
Basic contactassembly, threeposition switch
CNCN33
DESCRIPTION SYMBOLSYMBOL
NAME
Basic contactassembly, fourposition switch
CNCN34
CONTACTOR
Contactor, manu-ally operated 3-pole
CNCT01
Contactor, electri-cally operated 1-pole with seriesblowout coil
CNCT02
Contactor, electri-cally operated 3-pole with seriesblowout coils
CNCT03
Contactor, electri-cally operated 1-pole with shuntblowout coil
CNCT04
FLASHER
Switch, safetyinterlock, circuitclosing
CNFL01
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
Electrical Symbol Library 4 - 5
Switch, self oper-ating thermal,break contact
CNFL02
Switch, self-oper-ating thermal
CNFL03
Switch, gas dis-charge tube withthermal element
CNFL04
FLOW-ACTIVATED SWITCH
Switch, flow actu-ated, closes onincrease
CNFS01
Switch, flow actu-ated, opens onincrease
CNFS02
FOOT-OPERATED SWITCH
Switch, foot oper-ated, opens byfoot pressure
CNFO01
Switch, foot oper-ated, closes byfoot pressure
CNFO02
DESCRIPTION SYMBOLSYMBOL
NAME
LIQUID-LEVEL-ACTUATED SWITCH
Switch, liquidlevel actuated,closes on risinglevel
CNLS01
Switch, liquidlevel actuated,opens on risinglevel
CNLS02
MAGNETIC BLOWOUT COIL
Magnetic blow-out coil
CNMB01
MERCURY SWITCH
Switch, mercury,three terminal
CNMS01
Switch, mercury,four terminal
CNMS02
Switch, mercury,four terminalwith accelerationcutoff
CNMS03
PRESSURE-ACTUATED SWITCH
Switch, pressureor vacuum actu-ated, closes onrising pressure
CNPS01
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
4 - 6 Electrical Symbol Library
Switch, pressureor vacuum actu-ated, opens on ris-ing pressure
CNPS02
RELAY
Relay, with trans-fer contacts
CNRL01
Relay, thermallyoperated
CNRL02
Relay, thermallyoperated with nor-mally open con-tacts
CNRL03
Relay, thermallyoperated withtransfer contacts
CNRL04
Relay, thermallyoperated. one-time type (notreusable)
CNRL05
RELAY COIL
Relay coil CNRC01
Relay coil, multi-winding
CNRC02
DESCRIPTION SYMBOLSYMBOL
NAME
Relay coil, elec-tromagnetic actu-ator
CNRC03
SAFETY INTERLOCK
Switch, safetyinterlock, circuitopening
CNISO1
Switch, safetyinterlock, circuitclosing
CNISO2
SPECIFIC SWITCH
Switch, operatedby shaft rotation,responsive tospeed
CNSW42
Switch, operatedby shaft rotation,plugging, to stopdrive when almostat rest
CNSW43
Switch, operatedby shaft rotation,anti-plugging, toprevent pluggingof drive
CNSW44
Switch, operatedby shaft rotation,centrifugal, open-ing on increasingspeed
CNSW45
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
Electrical Symbol Library 4 - 7
Switch, hook CNSW46
Switch, tele-phone dial
CNSW47
Switch, in evacu-ated envelope, 1-pole, double-throw
CNSW48
Switch, mush-room head safety
CNSW49
Switch, governor CNSW50
Switch, inter-rupter, shunt drive
CNSW51
Switch, inter-rupter, separatedrive
CNSW52
SWITCH
Switch, single-throw, general
CNSW01
DESCRIPTION SYMBOLSYMBOL
NAME
Switch, double-throw, general
CNSW02
Switch, 2-poledouble-throw
CNSW03
Switch, manuallyoperated, general
CNSW04
Switch, push-but-ton (non-locking)
CNSW05
Switch, pull-but-ton (non-locking)
CNSW06
Switch, turn-switch (locking)
CNSW07
Switch, knifeswitch, general
CNSW08
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
4 - 8 Electrical Symbol Library
Switch, 3-poledouble-throwknife switch withauxiliary contacts
CNSW09
Switch, with horngap
CNSW10
Switch, sector CNSW11
Switch, pushbut-ton, momentaryor spring-return,circuit closing(make)
CNSW12
Switch, pushbut-ton, momentaryor spring-return,circuit opening(break)
CNSW13
Switch, pushbut-ton, momentaryor spring-return,twp-circuit
CNSW14
Switch, two-cir-cuit, maintainedor not spring-returned
CNSW15
Switch, nonlock-ing, circuit clos-ing (make)
CNSW16
DESCRIPTION SYMBOLSYMBOL
NAME
Switch, nonlock-ing, circuit open-ing (break)
CNSW17
Switch, nonlock-ing, two circuit
CNSW18
Switch, nonlock-ing, transfer
CNSW19
Switch, nonlock-ing, make-before-break
CNSW20
Switch, locking,circuit closing(make)
CNSW21
Switch, locking,circuit opening(break)
CNSW22
Switch, locking,transfer, 2-posi-tion
CNSW23
Switch, locking,make-before-break
CNSW24
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
Electrical Symbol Library 4 - 9
Switch, combina-tion locking andnonlocking, 3-position 1-pole
CNSW25
Switch, combina-tion locking andnonlocking, 3-position 2-pole
CNSW26
Switch, key type,2-position withlocking transferand break con-tacts
CNSW27
Switch, key type,3-position withnon-locking trans-fer and lockingbreak contacts
CNSW28
Switch, key type,3-position, multi-contact combina-tion
CNSW29
Switch, key type,2-position, halfor key switch nor-mally operated
CNSW30
Switch, selectoror multiposition,general
CNSW31
DESCRIPTION SYMBOLSYMBOL
NAME
Switch, selectoror multiposition,break-before-make, nonshort-ing
CNSW32
Switch, selectoror multiposition,make-before-break, shorting
CNSW33
Switch, selectoror multiposition,segmental contact
CNSW34
Switch, limit,track type, circuitclosing
CNSW35
Switch, limit,track type, circuitopening
CNSW36
Switch, limit,lead-screw type,circuit opening
CNSW37
Switch, limit,directly actuated,spring returned,normally open
CNSW38
Switch, limit,directly actuated,spring returned,normally open -held closed
CNSW39
DESCRIPTION SYMBOLSYMBOL
NAME
CONTACTS, SWITCHES, CONTACTORS, RELAYS
4 - 10 Electrical Symbol Library
Switch, limit,directly actuated,spring returned,normally closed
CNSW40
Switch, limit,directly actuated,spring returned,normally closed -held open
CNSW41
TEMPERATURE-ACTUATED SWITCH
Switch, tempera-ture actuated,closes on risingtemperature
CNTS01
Switch, tempera-ture actuated,opens on risingtemperature
CNTS02
THERMOSTAT
Thermostat,closes on risingtemperature
CNTH01
Thermostat, withcontact-motiondirection clarified
CNTH02
Thermostat,opens on risingtemperature
CNTH03
Thermostat, trans-fers on rising tem-perature
CNTH04
DESCRIPTION SYMBOLSYMBOL
NAME
Thermostat, trans-fer, with intendedcentral-off posi-tion
CNTH05
Thermostat, mul-tifunction typical
CNTH06
Thermostat, withintegral heaterand transfer con-tacts
CNTH07
TIME-DELAY SWITCH
Switch, openwith time delayclosing (TDC)
CNDS01
Switch, closedwith time delayopening (TDO)
CNDS02
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 5 - 1
3TERMINALS AND CONNECTORS
DESCRIPTION SYMBOLSYMBOL
NAME
APPLICATIONS
CONNECTOR
Connector, 2-con-ductor non-polar-ized with malecontacts
TCEC01
Connector, 2-con-ductor non-polar-ized with femalecontacts
TCEC02
Connector, 2-con-ductor polarizedwith female con-tacts
TCEC03
Connector, 3-con-ductor polarizedwith female con-tacts
TCEC04
Connector, 4-con-ductor polarizedwith female con-tacts
TCEC05
JACK AND PLUG
Connector, femalecontact
TCJP01
Connector, malecontact
TCJP02
Connector, 2-con-ductor (jack)
TCJP03
Connector, 2-con-ductor (plug)
TCJP04
Connector, 3-con-ductor with 2break contactsand 1 auxiliarymake contact
TCJP05
Connector, 3-con-ductor (plug)
TCJP06
WAVEGUIDE FLANGE
Waveguideflange with matedpair of symmetri-cal wavequideconnector
TCWG01
Waveguideflange with matedpair of asymmet-rical wavequideconnector
TCWG02
Waveguideflange with matedpair of asymmet-rical wavequideconnector
TCWG03
Waveguideflange, plain (rect-angularwaveguide)
TCWG04
DESCRIPTION SYMBOLSYMBOL
NAME
TERMINALS AND CONNECTORS
5 - 2 Electrical Symbol Library
Waveguideflange, choke(rectangularwaveguide)
TCWG05
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 6 - 1
6TRANSFORMERS, INDUCTORS, AND WINDINGS
DESCRIPTION SYMBOL GENERIC
ELEMENTS
Core of magnet TICE
Magnetic core ofinductor or trans-former
TIME
Magnetic mem-ory core, single-aperture type withwindings shown
TIMM
General TIWE01
Choke reactor TIWE02
APPLICATIONS
FERRITE CORE
Ferrite core TIFC01
Flux/currentdirection indica-tor
TIFC02
INDUCTOR
Inductor, general TIIW01
Magnetic-coreinductorTelephone load-ing coil
TIIW02
Inductor, tappedTIIW03
Adjustable orcontinuouslyadjustable induc-tor
TIIW04
Coil operatedflag indicator
TIIW05
Adjustable induc-tor
TIIW06
Inductor withgap in magneticcore
TIIW07
Inductor withmoving contact,variable in steps
TIIW08
Variometer TIIW09
DESCRIPTION SYMBOL GENERIC
TRANSFORMERS, INDUCTORS, AND WINDINGS
6 - 2 Electrical Symbol Library
MAGNETIC STORAGE
Matrix arrange-ment comprisingthin sheet mag-netic stores
TIMS
TRANSDUCTOR
Transductor ele-ment, assembled
TITR01
Application: sin-gle-phase seriestransducto withwinding-polarityand kind-of-cur-rent markingsshown
TITR02
Application: sin-gle-phase paral-lel transductorwith winding-polarity and kind-of-current mark-ings shown
TITR03
Application: self-exciting transduc-tor with two con-trol circuits andkind-of-currentmarkings shown
TITR04
Application:transductor withdirect-currentoutput and kind-of-current mark-ings shown
TITR05
DESCRIPTION SYMBOL GENERIC
TRANSFORMER
Transformer, gen-eral
TITF01
Application:transformer withdirect-currentconnections andmode suppres-sion between tworectangularwaveguides
TITF02
Transformer, non-saturating
TITF03
Application:shielded trans-former with mag-netic core shown
TITF04
Application:transformer withmagnetic coreshown and withan electrostaticshield betweenwindings; theshield is shownconnected to theframe
TITF05
DESCRIPTION SYMBOL GENERIC
TRANSFORMERS, INDUCTORS, AND WINDINGS
Electrical Symbol Library 6 - 3
Saturating trans-former
TITF06
Transformer withone winding withadjustable induc-tance
TITF07
Transformer witheach windingwith separatelyadjustable induc-tance
TITF08
Adjustablemutual inductor;constant-currenttransformer
TITF09
Transformer withtaps, 1-phase
TITF10
Autotransformer,1-phase
TITF11
DESCRIPTION SYMBOL GENERIC
Transformer,adjustable
TITF12
Step-voltage reg-ulator or load-ratio controlautotransformer
TITF13
Step-voltage reg-ulator
TITF14
Load-ratio con-trol autotrans-former
TITF15
Load-ratio con-trol transformerwith taps
TITF16
1-phase induc-tion voltage regu-lators
TITF17
Triplex inductionvoltage regulator
TITF18
DESCRIPTION SYMBOL GENERIC
TRANSFORMERS, INDUCTORS, AND WINDINGS
6 - 4 Electrical Symbol Library
3-phase induc-tion voltage regu-lator
TITF19
1-phase, 2-wind-ing transformer
TITF20
Application: 3-phase bank of 1-phase, 2-windingtransformerswith wye-deltaconnections
TITF21
Three phasetransformer with4 taps with wye-wye connections
TITF22
Polyphase trans-former
TITF23
DESCRIPTION SYMBOL GENERIC
1-phase, 3-wind-ing transformer
TITF24
Current trans-former
TITF25
Bushing-type cur-rent transformer
TITF26
Potential trans-former
TITF27
Linear coupler TITF28
Single-phasetransformer withtwo windingsand screen
TITF29
Transformer withcenter tapping onone winding
TITF30
Autotransformer,three-phase, starconnection
TITF31
DESCRIPTION SYMBOL GENERIC
TRANSFORMERS, INDUCTORS, AND WINDINGS
Electrical Symbol Library 6 - 5
Three-phasetransformer, con-nection star-delta
TITF32
Three-phasetransformer withon-load tapchanger, connec-tion star-delta
TITF33
Three-phasetransformer, con-nection star-zig-zag
TITF34
Three-phasetransformer, con-nection star-star-delta
TITF35
Current trans-former with twocores and twosecondary wind-ings
TITF36
Current trans-former with twosecondary wind-ings on one core
TITF37
DESCRIPTION SYMBOL GENERIC
Current trans-former with onesecondary wind-ing with threetappings
TITF38
Current trans-former where theprimary conduc-tor forms fivewinding turns
TITF39
Pulse or currenttransformer withone permanentwinding and threeheaded windings
TITF40
Pulse or currenttransformer withtwo permanentwindings on thesame core andwith ninethreaded windi-ongs
TITF41
DESCRIPTION SYMBOL GENERIC
[ THIS PAGE LEFT INTENTIONALLY BLANK ]
Electrical Symbol Library 7 - 1
7ELECTRON TUBES AND RELATED DEVICES
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
COLLECTING AND EMITTING ELECTRODE
Collecting andemitting elec-trode, dynode
ETCM01
Alternatively col-lecting and emit-ting electrode,composite anode-photocathode
ETCM02
Alternatively col-lecting and emit-ting electrode,composite anode-cold cathode
ETCM03
Alternatively col-lecting and emit-ting electrode,composite anode-ionically heatedcathode with pro-vision for supple-mentary heating
ETCM04
COLLECTING ELECTRODE
Collecting elec-trode, anode orplate
ETCO01
Collecting elec-trode, target or x-ray anode
ETCO02
Collecting elec-trode, fluorescenttarget
ETCO03
Controlling elec-trode, collector
ETCO04
CONTROLLING ELECTRODE
Controlling elec-trode, grid(including beam-confining orbeam-formingelectrodes)
ETCE01
Controlling elec-trode, deflectingelectrodes (usedin pairs)
ETCE02
Controlling elec-trode, ignitor (inpool tubes)(should extendinto pool); starter(in gas tubes)
ETCE03
Controlling elec-trode, excitor(contactor type)
ETCE04
Controlling elec-trode grid withsecondary emis-sion
ETCE05
Controlling elec-trode, radialdeflecting elec-trodes (one pairof electrodesshown)
ETCE06
DESCRIPTION SYMBOLSYMBOL
NAME
ELECTRON TUBES AND RELATED DEVICES
7 - 2 Electrical Symbol Library
Controlling elec-trode, ion diffu-sion barrier
ETCE07
Controlling elec-trode, intensitymodulating elec-trode
ETCE08
Controlling elec-trode, focusingelectrode withaperture; beamforming plate
ETCE09
Controlling elec-trode, beam-split-ting electrodeinternally con-nected to thefinal focusingelectrode of theelectron gun
ETCE10
Controlling elec-trode, cylindricalfocusing elec-trode; drift spaceelectrode (elec-tronic lens ele-ment)
ETCE11
Controlling elec-trode, cylindricalfocusing elec-trode with grid
ETCE12
Controlling mul-tiaperture elec-trode
ETCE13
Collecting elec-trode, quantizingelectrode, sam-pling electrode
ETCE14
DESCRIPTION SYMBOLSYMBOL
NAME
COUPLING
Coupling by loop(electromagnetictype)
ETCP
EMITTING ELECTRODE
Emitting elec-trode withdirectly heated(filamentary)cathode
ETEE01
Emitting elec-trode, indirectlyheated cathode
ETEE02
Emitting elec-trode, cold cath-ode (includingionically heatedcathode)
ETEE03
Emitting elec-trode, photocath-ode
ETEE04
Emitting elec-trode, pool cath-ode
ETEE05
Emitting elec-trode, ionicallyheated cathodewith provision forsupplementaryheating
ETEE06
HEATED CATHODE
Directly heated(filamentary)cathode
ETHE
DESCRIPTION SYMBOLSYMBOL
NAME
ELECTRON TUBES AND RELATED DEVICES
Electrical Symbol Library 7 - 3
MICROWAVE TUBE
Symbol elementsfor microwavetubes; electrongun assembly,shown with enve-lope
ETMW01
Symbol elementsfor microwavetubes; reflector,repelling elec-trode (used invelocity modu-lated tubes)
ETMW02
Symbol elementsfor microwavetubes; non-emit-ting sole for openslow-wave struc-ture
ETMW03
Symbol elementsfor microwavetubes; non-emit-ting sole forclosed slow-wave structure
ETMW04
Symbol elementsfor microwavetubes; emittingsole (arrow indi-cates direction ofelectron flow)
ETMW05
STORAGE ELECTRODE
Storage electrode ETSE01
DESCRIPTION SYMBOLSYMBOL
NAME
Photoemissivestorage electrode
ETSE02
Storage electrodewith secondaryemission in thedirection of thearrow
ETSE03
Photoconductivestorage electrode
ETSE04
APPLICATIONS
GENERAL
Coulomb accu-mulator, electro-chemical step-function device
ETCA
Typical applica-tion of cold cath-ode gas-filledtube rectifier;voltage regulatorfor direct-currentoperation
ETCC
Conductivity cell ETCL
Typical applica-tion of equipoten-tial-cathodepentode withelongated enve-lope
ETEC
DESCRIPTION SYMBOLSYMBOL
NAME
ELECTRON TUBES AND RELATED DEVICES
7 - 4 Electrical Symbol Library
Typical applica-tion of single-unit, vacuum-type phototube
ETPT01
Typical applica-tion of multiplier-type phototube
ETPT02
Diode solion, ion-diffusion device
ETSO01
Tetrode solion,ion-diffusiondevice
ETSO02
Typical applica-tion of thyratronwith indirectlyheated cathode
ETTH
Typical applica-tion of triode withdirectly heatedfilamentary cath-ode and envelopeconnection tobase terminal
ETTR01
Typical applica-tion of equipoten-tial cathode twintriode with elon-gated envelope
ETTR02
DESCRIPTION SYMBOLSYMBOL
NAME
X-RAY TUBE
Typical applica-tion of X-ray tubewith filamentarycathode andfocusing grid(cup), anodecooled by fluid orradiation.
ETXX01
Typical applica-tion of X-ray tubewith control grid,filamentary cath-ode, and focus-ing cup
ETXX02
Typical applica-tion of X-ray tubewith groundedelectrostaticshield
ETXX03
Typical applica-tion of X-raytube, doublefocus with rotat-ing anode
ETXX04
Typical applica-tion of X-ray tubewith multipleaccelerating elec-trode electrostati-cally andelectromagnetic-ally focused
ETXX05
DESCRIPTION SYMBOLSYMBOL
NAME
ELECTRON TUBES AND RELATED DEVICES
Electrical Symbol Library 7 - 5
CATHODE-RAY TUBE
Typical applica-tion of cathode-ray tube withelectric-field(electrostatic)deflection
ETCT01
Typical applica-tion of double-beam cathode-ray tube, splitbeam with: elec-trostatic deflec-tion, indirectlyheated cathode
ETCT02
Typical applica-tion of cathoderay tube, singlegun with EMdeflection
ETCT03
Typical applica-tion of cathoderay tube, multi-ple gun with EMdeflection
ETCT04
Typical applica-tion of multiplegun cathode-raytube with electro-magnetic devia-tion, with:permanent mag-net focusing andion trap;intensity modu-lating electrode;indirectly heatedcathode
ETCT05
DESCRIPTION SYMBOLSYMBOL
NAME
MERCURY-POOL TUBE
Typical applica-tion of mercury-pool tube, ignitorand control grid
ETMT01
Typical applica-tion of mercury-pool tube, excitor,control grid, andholding anode
ETMT02
Typical applica-tion of mercury-pool tube, singleanode pool-typevapor rectifierwith ignitor
ETMT03
Typical applica-tion of mercurypool tube, 6-anode metallic-tank pool-typevapor rectifierwith excitor,showing rigid-ter-minal symbol forcontrol connec-tion to tank (poolcathode is insu-lated from tank)
ETMT04
Typical applica-tion of mercurypool tube, pool-type cathodepower rectifier
ETMT05
DESCRIPTION SYMBOLSYMBOL
NAME
ELECTRON TUBES AND RELATED DEVICES
7 - 6 Electrical Symbol Library
NUCLEAR-RADIATION DETECTOR
Nuclear-radia-tion detector (gas-filled), general
ETRD01
Nuclear-radia-tion detector (gas-filled); applica-tion: metal enclo-sure, having onecollector con-nected to theenclosure
ETRD02
Ionizing radia-tion detectors;ionization cham-ber
ETRD03
Ionizing radia-tion detectors;ionization cham-ber with grid
ETRD04
Ionizing radia-tion detectors;ionization cham-ber with guardring
ETRD05
Ionizing radia-tion detectors;ionization cham-ber, compensatedtype
ETRD06
Ionizing radia-tion detectors;faraday cup
ETRD07
DESCRIPTION SYMBOLSYMBOL
NAME
Ionizing radia-tion detectors;counter tube
ETRD08
Ionizing radia-tion detectors;counter tube withguard ring
ETRD09
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 8 - 1
8SEMICONDUCTOR DEVICES
DESCRIPTION SYMBOL GENERIC
ELEMENTS
Collector onregion of dissimi-lar conductivitytype
SDCL
Enhancement-type semiconduc-tor region withplurality ofohmic connec-tions and a recti-fying junction
SDET
One insulatedgate
SDGT01
Multiple gate(two gates shown)
SDGT02
Intrinsic regionbetween a collec-tor and a region ofdissimilar-con-ductivity type,either PIN or NIP
SDIC01
Intrinsic regionbetween a collec-tor and a region ofsimilar conductiv-ity type, eitherPIP or NIN
SDIC02
Intrinsic regionbetween tworegions of dissim-ilar conductivitytype, either PINor NIP
SDIN01
Intrinsic regionbetween tworegions of similarconductivitytype, either PIP orNIN
SDIN02
N emitter on Pregion
SDNE
N region on Pregion
SDNP
P emitter on Nregion
SDPE
P region on Nregion
SDPN
Breakdown SDSP01
Tunneling break-down
SDSP02
DESCRIPTION SYMBOL GENERIC
SEMICONDUCTOR DEVICES
8 - 2 Electrical Symbol Library
Backward break-down
SDSP03
Capacitive break-down
SDSP04
APPLICATIONS
TWO-TERMINAL
Current regulator SDCR
Semiconductordiode; semicon-ductor rectifierdiode; metallicrectifier
SDDI01
Capacitive diode(varactor)
SDDI02
Temperature-dependent diode
SDDI03
Photosensitivephotodiode
SDDI04
DESCRIPTION SYMBOL GENERIC
Photoemissivephotodiode
SDDI05
Undirectionaldiode; voltageregulator
SDDI06
Bidirectionaldiode
SDDI07
Tunnel diode,style 1
SDDI08
Backward diode,tunnel rectifier
SDDI09
Bidirectional pho-todiode; photo-duo-diode (photo-sensitive type);PNP-type
SDDI11
Photosensitivetype: two-seg-ment, with onecommon cathodelead
SDDI12
DESCRIPTION SYMBOL GENERIC
SEMICONDUCTOR DEVICES
Electrical Symbol Library 8 - 3
Bidirectional pho-todiode; photo-duo-diode (photo-sensitive type);NPN-type
SDDI13
Photosensitivetype: 4-quadrant,with commoncathode lead
SDDI14
Unidirectionalnegative-resis-tance breakdowndiode; triggerdiac, PNP-type
SDDI15
Unidirectionalnegative-resis-tance breakdowndiode; triggerdiac, NPN-type
SDDI16
Bidirectional neg-ative resistancebreakdowndiode; triggerdiac, NPN-type
SDDI17
Bidirectional neg-ative resistancebreakdowndiode; triggerdiac, PNP-type
SDDI18
Storage diode SDDI19
DESCRIPTION SYMBOL GENERIC
Phototransistor(NPN-type) with-out external baseconnection
SDPT
PIN-type diodeSDSR
Thyristor,reverse-blockingdiode-type
SDTH01
Thyristor, light-activated type
SDTH02
Thyristor, bidirec-tional diode type;bi-switch
SDTH03
THREE-TERMINAL
GENERAL
Incandescentlamp and sym-metrical photo-conductivetransducer
SDPI01
Photoemissivediode and pho-totransistor
SDPI02
DESCRIPTION SYMBOL GENERIC
SEMICONDUCTOR DEVICES
8 - 4 Electrical Symbol Library
Optical couplingdeviceOpto isolator
SDPI03
Magnetic cou-pling deviceMagnetic isolator
SDPI04
Solid-state thyra-tron (replacementtype), balanced
SDST01
Solid-state thyra-tron (replacementtype), unbalanced
SDST02
Semiconductorthermocouple,temperature-mea-suring
SDTM01
Semiconductorthermocouple,current-measuring
SDTM02
RADIATION DETECTOR
Detector, semi-conductor type
SDRD01
DESCRIPTION SYMBOL GENERIC
Scintillator detec-tor
SDRD02
Cerenkov detector SDRD03
Thermolumine-scence detector
SDRD04
THYRISTOR
Thyristor,reverse-blockingtriode-type, N-type gate; semi-conductor con-trolled rectifier,N-type gate, gen-eral
SDTY01
Thyristor,reverse-blockingtriode-type, N-type gate; semi-conductor con-trolled rectifier,gate turn-off type
SDTY02
Thyristor,reverse-blockingtriode-type, P-type gate; semi-conductor con-trolled rectifier, P-type gate, general
SDTY03
DESCRIPTION SYMBOL GENERIC
SEMICONDUCTOR DEVICES
Electrical Symbol Library 8 - 5
Thyristor,reverse-blockingtriode-type, P-type gate; semi-conductor con-trolled rectifier, P-type gate, gateturn-off type
SDTY04
Thyristor,reverse-blockingtetrode-type;semiconductorcontrolled switch
SDTY05
Thyristor, bidirec-tional triode-type, triac, gatedswitch
SDTY06
TRANSISTOR
Darlington tran-sistor (NPN-type)
SDDL
N-channel junc-tion gate
SDNT01
N-channel insu-lated-gate, deple-tion-type, single-gate, passive bulk(substrate), three-terminal device
SDNT02
DESCRIPTION SYMBOL GENERIC
N-channel insu-lated-gate, deple-tion-type, single-gate, active-bulk(substrate) inter-nally terminatedto source, three-terminal device
SDNT03
N-channel insu-lated-gate, deple-tion-type, single-gate, active-bulk(substrate) exter-nally terminated,four-terminaldevice
SDNT04
N-channel insu-lated-gate, deple-tion-type, two-gate, five-terminaldevice
SDNT05
N-channel insu-lated-gate,enhancement-type, single-gate,active-bulk (sub-strate) externallyterminated, four-terminal device
SDNT06
N-channel insu-lated-gate,enhancement-type, two-gate,five-terminaldevice
SDNT07
P-channel junc-tion gate
SDPC01
DESCRIPTION SYMBOL GENERIC
SEMICONDUCTOR DEVICES
8 - 6 Electrical Symbol Library
P-channel insu-lated-gate, deple-tion-type, single-gate, passive-bulk (substrate),three-terminaldevice
SDPC02
P-channel insu-lated-gate, deple-tion-type, single-gate, active-bulk(substrate) inter-nally terminatedto source, three-terminal device
SDPC03
P-channel insu-lated-gate, deple-tion-type, single-gate, active-bulk(substrate) exter-nally terminated,four-terminaldevice
SDPC04
P-channel insu-lated-gate, deple-tion-type, two-gate, five-terminaldevice
SDPC05
P-channel insu-lated-gate,enhancementtype, single-gate,active-bulk (sub-strate) externallyterminated, four-terminal device
SDPC06
DESCRIPTION SYMBOL GENERIC
P-channel insu-lated-gate,enhancement-type, two-gate,five-terminaldevice
SDPC07
Phototransistor(PNP-type)
SDPH
Photovoltaictransducer; barrierphotocell; block-ing-layer cell;solar cell
SDPS
PNP transistor(also PNIP tran-sistor if omittingthe intrinsicregion will notresult in ambigu-ity)
SDTR01
PNP transistorwith one electrodeconnected toenvelope
SDTR02
NPN transistor(also NPIN tran-sistor, if omitttingthe intrinsicregion will notresult in ambigu-ity)
SDTR03
NPN transistorwith multipleemitters
SDTR04
DESCRIPTION SYMBOL GENERIC
SEMICONDUCTOR DEVICES
Electrical Symbol Library 8 - 7
NPN transistorwith transverse-biased base
SDTR05
PNIP transistorwith ohmic con-nection to theintrinsic region
SDTR06
NPIN transistorwith ohmic con-nection to theintrinsic region
SDTR07
PNIN transistorwith ohmic con-nection to theintrinsic region
SDTR08
NPIP transistorwith ohmic con-nection to theintrinsic region
SDTR09
Unijunction tran-sistor with N-type base
SDTR10
Unijunction tran-sistor with P-typebase
SDTR11
DESCRIPTION SYMBOL GENERIC
[ THIS PAGE LEFT INTENTIONALLY BLANK ]
Electrical Symbol Library 9 - 1
9CIRCUIT PROTECTORS
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
Protective relay,protective func-tion, over
CPRE01
Protective relay,protective func-tion, under
CPRE02
Protective relay,protective func-tion, directionalover
CPRE03
Protective relay,protective func-tion, balance
CPRE04
Protective relay,protective func-tion, differential
CPRE05
Protective relay,protective func-tion, pilot wire
CPRE06
APPLICATIONS
LIGHTNING ARRESTER
Lightningarrester, general CPAR01
Lightningarrester, carbonblock
CPAR02
Lightningarrester, electro-lytic or alumi-num cell
CPAR03
Lightningarrester, horn gap CPAR04
Lightningarrester, protec-tive gap
CPAR05
Lightningarrester, spheregap
CPAR06
Lightningarrester, valve orfilm element
CPAR07
Lightningarrester, multi-gap, general
CPAR08
CIRCUIT BREAKER
Circuit breaker,general
CPCB01
Circuit breaker,network protector
CPCB02
Circuit breaker CPCB03
Circuit breaker, 3-pole with thermal-overload device inall 3 poles
CPCB04
DESCRIPTION SYMBOLSYMBOL
NAME
CIRCUIT PROTECTORS
9 - 2 Electrical Symbol Library
Circuit breaker, 3-pole with mag-netic-overload inall 3 poles
CPCB05
Circuit breaker, 3-pole, drawouttype
CPCB06
FUSE
Fuse, generalCPFS01
Fuse, supply side CPFS02
Fuse, high volt-age primary fusecutout, dry
CPFS03
Fuse, high voltageprimary fuse cut-out, oil
CPFS04
DESCRIPTION SYMBOLSYMBOL
NAME
Fuse, isolatingfuse-switch foron-load switching
CPFS05
RELAY
Protective relay,phase sequencequantity, overcur-rent
CPRY01
Protective relay,phase sequencequantity, direc-tional overcurrent
CPRY02
Protective relay,phase sequencequantity, direc-tional residualovercurrent
CPRY03
Protective relay,phase sequencequantity, under-voltage
CPRY04
Protective relay,phase sequencequantity, powerdirectional
CPRY05
Protective relay,phase sequencequantity, bal-anced current
CPRY06
Protective relay,phase sequencequantity, differen-tial current
CPRY07
Protective relay,phase sequencequantity, distance
CPRY08
Protective relay,phase sequencequantity, direc-tional distance
CPRY09
DESCRIPTION SYMBOLSYMBOL
NAME
CIRCUIT PROTECTORS
Electrical Symbol Library 9 - 3
Protective relay,phase sequencequantity, overfre-quency
CPRY10
Protective relay,phase sequencequantity, overtem-perature
CPRY11
Protective relay,phase sequencequantity, phasebalance
CPRY12
Protective relay,phase sequencequantity, phasesequence
CPRY13
Protective relay,phase sequencequantity, pilotwire, differential-current
CPRY14
Protective relay,phase sequencequantity, pilotwire, directional-comparison
CPRY15
Protective relay,phase sequencequantity, positivephase-sequenceundervoltage
CPRY16
Protective relay,phase sequencequantity, negativephase-sequenceovercurrent
CPRY17
Protective relay,phase sequencequantity, gas-pressure
CPRY18
Protective relay,phase sequencequantity, out-of-step
CPRY19
DESCRIPTION SYMBOLSYMBOL
NAME
[ THIS PAGE LEFT INTENTIONALLY BLANK ]
Electrical Symbol Library 10 - 1
10ACOUSTIC DEVICES
DESCRIPTION SYMBOLSYMBOL
NAME
APPLICATIONS
Audible signalingdevice, bell
ACOU01
Audible signalingdevice, single-stroke
ACOU02
Audible signalingdevice, buzzer
ACOU03
Audible signalingdevice, loud-speaker, general
ACOU04
Audible signalingdevice, loud-speaker-micro-phone
ACOU05
Audible signalingdevice, telegraphsounder
ACOU06
Audible signalingdevice, micro-phone, general
ACOU07
Audible signalingdevice, handset,general
ACOU08
Audible signalingdevice, handset,with push-to-talkswitch
ACOU09
Audible signalingdevice, handset,3-conductor
ACOU10
Audible signalingdevice, handset,4-conductor
ACOU11
Audible signalingdevice, handset,4-conductor withpush-to-talkswitch
ACOU12
Audible signalingdevice, handset,operator’s set
ACOU13
Telephonereceiver, general
ACOU14
Telephonereceiver, headset,double
ACOU15
Telephonereceiver, headset,single
ACOU16
Audible signalingdevice, hydro-phone
ACOU17
DESCRIPTION SYMBOLSYMBOL
NAME
ACOUSTIC DEVICES
10 - 2 Electrical Symbol Library
Audible signalingdevice, horn
ACOU18
Audible signalingdevice, siren
ACOU19
Audible signalingdevice, whistle
ACOU20
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 11 - 1
11LAMPS AND VISUAL-SIGNALING DEVICES
DESCRIPTION SYMBOLSYMBOL
NAME
APPLICATIONS
LAMP
Lamp, ballast VSBL
Lamp, electronicflash tube
VSET
Lamp, floures-cent, 2-terminal
VSFL01
Lamp, floures-cent, 4-terminal
VSFL02
Lamp, incades-cent
VSIL
Lamp, general VSLA01
Lamp, signallamp, general
VSLA02
Lamp, signallamp, flashingtype
VSLA03
Lamp, glow, AC-type
VSNL01
Lamp, glow, DC-type
VSNL02
VISUAL DEVICE
Visual-signalingdevice, annuncia-tor
VSDA01
Visual-signalingdevice, annuncia-tor drop or sig-nal, shutter orgrid type
VSDA02
Visual-signalingdevice, annuncia-tor drop or sig-nal, ball type
VSDA03
Visual-signalingdevice, manuallyrestored drop
VSDA04
Visual-signalingdevice, electri-cally restoreddrop
VSDA05
Visual-signalingdevice, communi-cation switch-board type lamp
VSDI01
Visual-signalingdevice, indicat-ing, pilot, signal-ing, orswitchboard light
VSDI02
Visual-signalingdevice, green sig-nal light
VSDI03
DESCRIPTION SYMBOLSYMBOL
NAME
LAMPS AND VISUAL-SIGNALING DEVICES
11 - 2 Electrical Symbol Library
Electromechani-cal signal, indica-tor,electromechani-cal annunciator,element
VSDI04
Electromechani-cal signal, elec-tromechanicalposition indicator
VSDI05
Electromechani-cal signal, coiloperated flagindicator
VSDI06
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 12 - 1
12READOUT DEVICES
DESCRIPTION SYMBOLSYMBOL
NAME
APPLICATIONS
COUNTING DEVICE
Counting device,counting functionof a number ofevents
RDII01
Counting device,pulse meter
RDII02
Counting device,pulse meter, man-ually preset to n(reset if n=0)
RDII03
Counting device,pulse meter, elec-trically reset to 0
RDII04
Counting device,pulse meter withmultiple contacts
RDII05
Counting device,cam driven andclosing contactfor each n events
RDII06
INDICATING INSTRUMENT
Voltmeter RDMI01
Reactive currentammeter
RDMI02
ϕ
Maximumdemand indicatoractuated by inte-grating meter
RDMI03
Varmeter RDMI04
Power-factormeter
RDMI05
Phase meter RDMI06
Frequency meter RDMI07
Synchronoscope RDMI08
Wavemeter RDMI09
Oscilloscope RDMI10
Differential volt-meter
RDMI11
Galvonometer RDMI12
DESCRIPTION SYMBOLSYMBOL
NAME
ϕ
ϕ
λ
READOUT DEVICES
12 - 2 Electrical Symbol Library
Salinity meter RDMI13
Thermometerpyrometer
RDMI14
Tachometer RDMI15
INTEGRATING INSTRUMENT
Hour meter RDRI04
Ampere-hourmeter
RDRI05
Watthour meter RDRI06
Watthour meter,measuring energytransmitted inone direction only
RDRI07
Watthour meter,measuring energyflow from thebushbars
RDRI08
DESCRIPTION SYMBOLSYMBOL
NAME
θ
Watthour meter,measuring energyflow towards thebushbars
RDRI09
Import-exportwatthour meter
RDRI10
Multirate wat-thour meter, two-rate shown
RDRI11
Excess watthourmeter
RDRI12
Watthour meterwith transmitter
RDRI13
Remote meter(repeater) actu-ated by watthourmeter
RDRI14
Remote meter(repeater) withprinting device,actuated by wat-thour meter
RDRI15
Watthour meterwith maximumdemand indicator
RDRI16
DESCRIPTION SYMBOLSYMBOL
NAME
READOUT DEVICES
Electrical Symbol Library 12 - 3
Watthour meterwith maximumdemand recorder
RDRI17
Varhour meter RDRI18
METER INSTRUMENT
Galvonometer RDEC01
Electromagneti-cally operatedcounter, general
RDEC02
Electromagneti-cally operatedcounter, withmake contact
RDEC03
RECORDING INSTRUMENT
Recording watt-meter
RDRI01
Combined record-ing wattmeterand varmeter
RDRI02
Oscillograph RDRI03
DESCRIPTION SYMBOLSYMBOL
NAME
TELEMETERING DEVICE
Telemeteringdevice, signaltranslator
RDTD01
Telemeteringtransmitter
RDTD02
Telemeteringreceiver
RDTD03
DESCRIPTION SYMBOLSYMBOL
NAME
[ THIS PAGE LEFT INTENTIONALLY BLANK ]
Electrical Symbol Library 13 - 1
7ROTATING MACHINERY
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
Rotating machine,generator
RMGE01
Rotating machine,generator, directcurrent
RMGE02
Rotating machine,generator, alter-nating-current
RMGE03
Rotating machin-ery, generator,synchronous
RMGE04
Rotating machin-ery, motor (gen-eral)
RMGE05
Rotating machin-ery, motor, direct-current
RMGE06
Rotating machin-ery, motor, alter-nating-current
RMGE07
Rotating machin-ery, motor syn-chronous
RMGE08
Rotating machin-ery, rotatingarmature withcommutator andbrushes
RMGE09
Rotating machin-ery, hand genera-tor
RMGE10
Rotatingmachines, linearmotor, generalsymbol
RMGE11
Rotatingmachines, step-ping motor, gen-eral symbol
RMGE12
Field, generatoror motor, com-pensating or com-municating
RMFG01
Field, generatoror motor, series
RMFG02
Field, generatoror motor, shunt,or separatelyexcited
RMFG03
DESCRIPTION SYMBOLSYMBOL
NAME
ROTATING MACHINERY
13 - 2 Electrical Symbol Library
Winding connec-tion symbols, 1-phase
RMWC01
Winding connec-tion symbols, 2-phase
RMWC02
Winding connec-tion symbols, 3-phase wye(ungrounded)
RMWC03
Winding connec-tion symbols, 3-phase wye(grounded)
RMWC04
Winding connec-tion symbols, 3-phase delta
RMWC05
Winding connec-tion symbols, 6-phase diametrical
RMWC06
Winding connec-tion symbols, 6-phase double-delta
RMWC07
DESCRIPTION SYMBOLSYMBOL
NAME
APPLICATIONS
DIRECT CURRENT MACHINE
Applications:direct-currentmachines, sepa-rately exciteddirect-currentgenerator ormotor
RMDC01
Applications:direct-currentmachines; sepa-rately exciteddirect-currentgenerator ormotor; with com-mutating or com-pensating filedwinding, or both
RMDC02
Applications:direct-currentmachines, com-positely exciteddirect-currentgenerator ormotor; with com-mutating or com-pensating filedwinding, or both
RMDC03
Applications:direct -currentmachines, direct-current seriesmotor or 2-wiregenerator
RMDC04
DESCRIPTION SYMBOLSYMBOL
NAME
ROTATING MACHINERY
Electrical Symbol Library 13 - 3
Applications:direct-currentmachines, directcurrent seriesmotor or 2-wiregenerator; withcommutating orcompensatingfield winding, orboth
RMDC05
Applications:direct-currentmachines, directcurrent shuntmotor or 2-wiregenerator
RMDC06
Applications:direct-currentmachines, directcurrent shuntmotor or 2-wiregenerator; withcommutating orcompensatingfiled winding, orboth
RMDC07
Applications:direct-currentmachines, directcurrent perma-nent-magnet-fieldgenerator ormotor
RMDC08
Applications:direct-currentmachines, directcurrent com-pound motor or 2-wire generator orstabilized shunt
RMDC09
DESCRIPTION SYMBOLSYMBOL
NAME
Applications:direct-currentmachines, directcurrent com-pound motor or 2-wire generator orstabilized shuntmotor; with com-mutating or com-pensating filedwinding, or both
RMDC10
Applications:direct-currentmachines, directcurrent 3-wireshunt generator
RMDC11
Applications:direct-currentmachines, directcurrent 3-wireshunt generator;with commutat-ing or compensat-ing filed winding,or both
RMDC12
Applications:direct-currentmachines, directcurrent 3-wirecompound gener-ator
RMDC13
DESCRIPTION SYMBOLSYMBOL
NAME
ROTATING MACHINERY
13 - 4 Electrical Symbol Library
Applications:direct-currentmachines, directcurrent 3-wirecompound gener-ator; with com-mutating orcompensatingfield winding, orboth
RMDC14
Applications:direct-currentmachines, directcurrent balancer,shunt wound
RMDC15
Applications:direct-currentmachines, directcurrent balancer,compound wound
RMDC16
Applications:direct-currentmachines, dyna-motor
RMDC17
Applications:direct-currentmachines, double-current generator
RMDC18
Applications:direct-currentmachines, acyclicgenerator, sepa-rately excited
RMDC19
DESCRIPTION SYMBOLSYMBOL
NAME
Applications:direct-currentmachines, regu-lating generator(rotary ampli-fier), shunt woundwith short-cir-cuited brushes
RMDC20
Applications:direct-currentmachines, regu-lating generator(rotary ampli-fier), shunt woundwithout short-cir-cuited brushes
RMDC21
Applications:direct-currentmachines, regu-lating generator(rotary ampli-fier), shunt woundcompensatingfiled winding andshort-circuitedbrushes
RMDC22
Applications:direct-currentmachines, regu-lating generator(rotary ampli-fier), shunt woundcompensatingfiled windingwithout short-cir-cuited brushes
RMDC23
DESCRIPTION SYMBOLSYMBOL
NAME
ROTATING MACHINERY
Electrical Symbol Library 13 - 5
ALTERNATING CURRENT MACHINE
Applications:alternating-cur-rent machines,squirrel-cageinduction motoror generator, split-phase inductionmotor or genera-tor, rotary phaseconverter, orrepulsion motor
RMAC01
Applications:alternating-cur-rent machines,wound-rotorinduction motor,synchronousinduction motor,induction genera-tor, or inductionfrequency con-verter
RMAC02
Applications:alternating-cur-rent machines,alternating-cur-rent series motor
RMAC03
Applications:alternating-cur-rent machines,alternating-cur-rent series motor,with commutat-ing or compensat-ing filed winding,or both
RMAC04
DESCRIPTION SYMBOLSYMBOL
NAME
Applications:alternating-cur-rent machines,1-phase shaded-pole motor
RMAC05
Applications:alternating-cur-rent machines,1-phase repul-sion-start induc-tion motor
RMAC06
Applications:alternating-cur-rent machines,1-phase hystere-sis motor
RMAC07
Applications:alternating-cur-rent machines,1-phase reluc-tance motor
RMAC08
Applications:alternating-cur-rent machines,1-phase sub-syn-chronous reluc-tance motor
RMAC09
Applications:alternating-cur-rent machines,magnetoelectricgenerator,1-phase, tele-phone magneto
RMAC10
DESCRIPTION SYMBOLSYMBOL
NAME
ROTATING MACHINERY
13 - 6 Electrical Symbol Library
Applications:alternating-cur-rent machines,shunt characteris-tic brush-shiftingmotor with 3-phase rotor
RMAC11
Applications:alternating-cur-rent machines,series-characteris-tic brush-shiftingmotor with 3-phase rotor
RMAC12
Applications:alternating-cur-rent machines,series-characteris-tic brush-shiftingmotor with 6- or8- phase rotor
RMAC13
Applications:alternating-cur-rent machines,ohmic-dropexciter with 3- or6-phase input
RMAC14
Applications:alternating-cur-rent machines,ohmic-drop exci-tor with 3- or 6-phase input, withoutput leads
RMAC15
DESCRIPTION SYMBOLSYMBOL
NAME
Applications:alternating-cur-rent machines, 3-phase regulatingmachine
RMAC16
Applications;alternating-cur-rent machines,induction motor,three-phase,squirrel cage
RMAC17
Applications;alternating-cur-rent machines,induction motor,single-phase,squirrel cage,leads of splitphase brought out
RMAC18
Applications;alternating-cur-rent machines,induction motor,three-phase, star-connected, withautomatic starterin the rotor
RMAC19
Applications;alternating-cur-rent machines,linear inductionmotor, three-phase, movementlimited to onedirection
RMAC20
DESCRIPTION SYMBOLSYMBOL
NAME
ROTATING MACHINERY
Electrical Symbol Library 13 - 7
PHASE SHIFTER
Applications:alternating-cur-rent machines,phase-shifterwith 1-phase out-put
RMPS01
Applications:alternating-cur-rent machines,phase-shifterwith 3-phase out-put
RMPS02
DC FIELD EXCITATION
Applications:alternating-cur-rent machineswith direct-cur-rent field excita-tion, synchronousmotor, generator,or condenser
RMAD01
Applications:alternating-cur-rent machineswith direct-cur-rent field excita-tion, synchronousmotor, generator,or condenser withneutral broughtout
RMAD02
DESCRIPTION SYMBOLSYMBOL
NAME
Applications:alternating-cur-rent machineswith direct-cur-rent field excita-tion, synchronousmotor, generator,or condenser withboth ends of eachphase brought out
RMAD03
Applications:alternating-cur-rent machineswith direct-cur-rent field excita-tion, double-winding synchro-nous generator,motor, or con-denser
RMAD04
Applications:alternating-cur-rent machineswith direct-cur-rent field excita-tion, synchronousmotor-synchro-nous frequencychanger
RMAD05
Applications:alternating-cur-rent machineswith direct-cur-rent field excita-tion, synchronousmotor-inductionfrequencychanger
RMAD06
DESCRIPTION SYMBOLSYMBOL
NAME
ROTATING MACHINERY
13 - 8 Electrical Symbol Library
Applications:alternating-cur-rent machineswith direct fieldexcitation, syn-chronous genera-tor, three-phase,permanent mag-net
RMAD07
COMPOSITE
Applications:alternating- anddirect-currentcomposite syn-chronous or t-poleconverter
RMCO01
Applications:alternating- anddirect-currentcomposite syn-chronous boosteror regulating-pole converter;with commutat-ing or compensat-ing filedwindings, or both
RMCO02
Applications:alternating- anddirect-currentcomposite syn-chronous con-verter, shunt-wound with com-mutating or com-pensating fieldwindings, or both
RMCO03
DESCRIPTION SYMBOLSYMBOL
NAME
Applications:alternating- anddirect-currentcomposite syn-chronous con-verter, compoundwound with com-mutating or com-pensating fieldwindings, or both
RMCO04
Applications:alternating- anddirect-currentcomposite motorconverter
RMCO05
SYNCHRO
Synchro, controltransformer; syn-chro, receiver;synchro, transmit-ter
RMSN01
Synchro, differen-tial receiver; syn-chro, differentialtransmitter
RMSN02
Synchro, resolver RMSN03
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 14 - 1
3MECHANICAL FUNCTIONS
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
Mechanical con-nection
MFMC01
Mechanicalmotion, transla-tion, one direction
MFMM01
Mechanicalmotion, transla-tion, both direc-tion
MFMM02
Mechanicalmotion, rotation,one direction
MFMM03
Mechanicalmotion, alternat-ing or reciprocat-ing
MFMM04
Mechanicalmotion, rota-tional speed orangular velocitydependence
MFMM05
APPLICATIONS
CLUTCH AND BRAKE
Clutch disen-gaged when oper-ating means isdeenergized
MFCB01
Clutch engagedwhen operatingmeans is deener-gized
MFCB02
ω
Brake appliedwhen operatingmeans is ener-gized
MFCB03
Brake releasedwhen operatingmeans is ener-gized
MFCB04
Brake MFCB05
Electric motorwith brakeapplied
MFCB06
Electric motorwith brakereleased
MFCB07
Gearing MFCB08
MANUAL CONTROL
Manual control,general
MFCN01
Manual control,operated by push-ing
MFCN02
Manual control,operated by pull-ing
MFCN03
DESCRIPTION SYMBOLSYMBOL
NAME
MECHANICAL FUNCTIONS
14 - 2 Electrical Symbol Library
Manual control,operated by push-ing and pulling
MFCN04
Manual control,operated withrestricted access
MFCN05
Manual control,operated by turn-ing
MFCN06
Manual control,operated by prox-imity effect
MFCN07
Manual control,operated bytouching
MFCN08
Emergencyswitch
MFCN09
Manual control,operated by hand-wheel
MFCN10
Manual control,operated by pedal
MFCN11
Manual control,operated by lever
MFCN12
Manual control,operated byremovable handle
MFCN13
Manual control,operated by key
MFCN14
DESCRIPTION SYMBOLSYMBOL
NAME
Manual control,operated by crank
MFCN15
Manual control,operated by roller
MFCN16
Manual control,operated by cam
MFCN17
Cam profile MFCN18
Manual control,operated by camand roller
MFCN19
Manual control,operated by storedmechanicalenergy
MFCN20
Manual control,operated by pneu-matic or hydrauliccontrol, singleacting
MFCN21
Manual control,operated by pneu-matic or hydrauliccontrol, doubleacting
MFCN22
Manual control,operated by elec-tromagnetic actu-ator
MFCN23
Manual control,operated by elec-tromagnetic over-current protection
MFCN24
DESCRIPTION SYMBOLSYMBOL
NAME
MECHANICAL FUNCTIONS
Electrical Symbol Library 14 - 3
Manual control,operated by ther-mal actuator
MFCN25
Manual control,operated by elec-tric motor
MFCN26
Manual control,operated by elec-tric clock
MFCN27
DETENT
Detents, latchingand blocking,automatic return
MFDT01
Detents, non-automatic return
MFDT02
Detents, engaged MFDT03
Mechanical inter-lock between twodevices
MFDT04
Latching device,disengaged
MFDT05
Blocking device,engaged
MFDT06
Detents, disen-gaged
MFDT07
Latching device,engaged
MFDT08
Blocking device,disengaged
MFDT09
DESCRIPTION SYMBOLSYMBOL
NAME
[ THIS PAGE LEFT INTENTIONALLY BLANK ]
Electrical Symbol Library 15 - 1
15VHF, UHF, AND SHF CIRCUITS
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
Application: E-plane couplingby aperture tospace
VUCE01
Application: E-plane couplingby aperture; 2ends of transmis-sion path avail-able
VUCE02
Application: E-plane couplingby aperture; 3ends of transmis-sion path avail-able
VUCE03
Application: E-plane couplingby aperture; 4ends of transmis-sion path avail-able
VUCE04
Direction coupler,general
VUDC01
Terminal discon-tinuity (one-port)
VUDE01
Discontinuity(two_port)
VUDE02
Ferrite bead ring,general
VUFB01
Mode suppres-sor, general
VUMS01
Mode transducer,general
VUMT01
Rotary joint(radio-frequencyrotary coupler)
VURJ01
Rotatable joint,with symmetricalconnectors
VURJ02
ResonatorTuned Cavity,general
VUTC01
Tetrapole VUTC02
Tetrapole withloop coupler
VUTC03
APPLICATIONS
FILTER
Mode filter VUFL01
Frequency filter(bandpass)
VUFL02
DESCRIPTION SYMBOLSYMBOL
NAME
VHF, UHF, AND SHF CIRCUITS
15 - 2 Electrical Symbol Library
Bandpass filterswitched by gasdischarge
VUFL03
MAGNETRON
Magnetron, reso-nant type withcoaxial output
VUMG01
Magnetron, tran-sit-time split platetype with stabiliz-ing deflectingelectrodes andinternal circuit
VUMG02
Magnetron, tun-able, aperturecoupled
VUMG03
Magnetron oscil-lator tube withindirectly heatedcathode, closedslow-wave struc-ture with dc con-nection by way ofa waveguide, per-manent field mag-net, window-coupler to rectan-gular waveguide
VUMG04
DESCRIPTION SYMBOLSYMBOL
NAME
Backward (travel-ling) wave oscil-lator tube(voltage tunablemagnetron) withindirectly heatedcathode, inten-sity modulatingelectrode, beam-forming plate,closed slow-wave structurewith dc connec-tion by way ofwaveguide, none-mitting sole, per-manent fieldmagnet, window-coupler to rectan-gular waveguide
VUMG05
RESONATOR
Resonator (cav-ity-type) tube
VURE01
Double-cavityenvelope andgrid-type associ-ated electrodes
VURE02
Multicavity mag-etron anode andenvelope
VURE03
TRANSMIT-RECEIVE TUBE
Transmit-receive(TR) tube, gas-filled, tunableintegral cavity,aperture coupled,with starter
VUTR01
DESCRIPTION SYMBOLSYMBOL
NAME
VHF, UHF, AND SHF CIRCUITS
Electrical Symbol Library 15 - 3
Transmit-receivetube
VUTR02
LASER
Maser, generalsymbol
VULS01
Maser used as anamolifier
VULS02
Laser (opticalmaser), generalsymbol
VULS03
Laser used as agenerator
VULS04
Ruby laser gener-ator
VULS05
Ruby laser gener-ator, shown withxenon lamp aspumping source
VULS06
NONRECIPROCAL DEVICE
Isolator VUIS01
Nonreciprocaldirectional phaseshifter
VUIS02
Gyrator VUIS03
DESCRIPTION SYMBOLSYMBOL
NAME
Circumlator,fixed direction
VUIS04
Reversible direc-tion
VUIS05
Field-polariza-tion rotator
VUIS06
Field-polariza-tion amplitudemodulator
VUIS07
TRAVELLING WAVE TUBE
Forward-wavetraveling-wave-tube amplifiershown with fourgrids, havingslow-wave struc-ture with attenua-tion, magneticfocusing by exter-nal permanentmagnet, rf inputand rf output cou-pling, each by E-plane aperture toexternal rectangu-lar waveguide
VUTW01
DESCRIPTION SYMBOLSYMBOL
NAME
VHF, UHF, AND SHF CIRCUITS
15 - 4 Electrical Symbol Library
Forward-wavetraveling-wave-tube amplifiershown with fourgrids, havingslow-wave struc-ture with attenua-tion, magneticfocusing by exter-nal permanentmagnet, rf inputand rf output cou-pling, each byinductive cou-pling
VUTW02
Forward-wavetraveling-wave-tube amplifiershown with fourgrids, havingslow-wave struc-ture with attenua-tion, magneticfocusing by exter-nal permanentmagnet, rf inputand rf output cou-pling, even byexternal cavityand loop couplingto a co-axial path
VUTW03
DESCRIPTION SYMBOLSYMBOL
NAME
Forward-wavetraveling-wave-tube amplifiershown with fourgrids, havingslow-wave struc-ture with attenua-tion, magneticfocusing by exter-nal permanentmagnet, rf inputand rf output cou-pling, each bydirect connectionfrom slow-wavestructure to acoaxial path
VUTW04
Forward-wavetraveling-wave-tube amplifiershown with fourgrids, having bifi-lar slow-wavestructure withattenuation, elec-trostatic focus-ing, rf input andrf output cou-pling, each byinductive cou-pling
VUTW05
DESCRIPTION SYMBOLSYMBOL
NAME
VHF, UHF, AND SHF CIRCUITS
Electrical Symbol Library 15 - 5
Backward-wavetraveling-wave-tube amplifiershown with twogrids, havingslow-wave struc-ture with attenua-tion, sole (beam-aligning elec-trode), magneticfocusing by exter-nal permanentmagnet, rf inputand rf output cou-pling, each by E-plane aperture toexternal rectangu-lar waveguide
VUTW06
Backward-wavetraveling-wave-tube oscillatorshown with twogrids, havingslow-wave struc-ture with attenua-tion, sole (beam-aligning elec-trode), magneticfocusing by exter-nal permanentmagnet, rf inputand rf output cou-pling by inductivecoupling
VUTW07
DESCRIPTION SYMBOLSYMBOL
NAME
Backward-wavetraveling-wave-tube oscillatorshown with twogrids, havingslow-wave struc-ture with attenua-tion, sole (beam-aligning elec-trode), magneticfocusing by exter-nal permanentmagnet, rf inputand rf output cou-pling by inductivecoupling, withslow-wave struc-ture connectedinternally to col-lector
VUTW08
O-type forwardtraveling waveamplifier tube,simplified repre-sentation
VUTW09
M-type forwardtraveling waveamplifier tubewith indirectlyheated cathode,intensity modu-lating electrode,beam-formingplate, preheatednonemitting sole,skow-wave struc-ture with dc con-nection,collector, perma-nent transversefield magnet,window couplersto rectangularwaveguides
VUTW10
DESCRIPTION SYMBOLSYMBOL
NAME
VHF, UHF, AND SHF CIRCUITS
15 - 6 Electrical Symbol Library
M-type back-ward (traveling)wave amplifiertube with fila-ment-heatedemitting sole,slow-wave struc-ture with dc con-nection,permanent trans-verse field mag-net, windowcouplers to rect-angularwaveguides
VUTW11
M-type back-ward (traveling)wave oscillatortube with indi-rectly heatedcathode, inten-sity modulatingelectrode, beam-forming plate,nonemitting sole,slow-wave struc-ture with dc con-nection by way ofwaveguide, col-lector, permanenttransverse fieldmagnet, window-coupler to rectan-gular waveguide
VUTW12
VELOCITY MODULATION TUBE
Reflex klystron,integral cavity,aperture coupled
VUVM01
DESCRIPTION SYMBOLSYMBOL
NAME
Double-cavityklystron, integralcavity, perma-nent externallyganged tuning,loop coupled
VUVM02
Reflex klystronwith indirectlyheated cathode,beam-formingplate, grid, tun-able integral cav-ity resonator,reflector, loopcoupler to coax-ial output
VUVM03
Klystron withindirectly heatedcathode, inten-sity modulatingcathode, beam-forming plate,external tunableinput cavity reso-nator, drift spaceelectrode, exter-nal tunable outputcavity resonatorwith dc connec-tion, collector,focusing coil,input loop cou-pler to coaxialwaveguide, out-put window cou-pler torectangularwaveguide
VUVM04
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 16 - 1
16COMPOSITE ASSEMBLIES
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
Amplifier, general CAAE01
Magnetic ampli-fier
CAAE02
Amplifier withtwo inputs
CAAE03
Amplifier withtwo outputs
CAAE04
Amplifier withadjustable gain
CAAE05
Amplifier withassociated attenu-ator
CAAE06
Amplifier withassociated powersupply
CAAE07
Amplifier withexternal feedbackpath
CAAE08
ItemEquipmentFunctional unit
CAGE
Heat source, gen-eral symbol
CAHS01
Radioisotopeheat source
CAHS02
Combustion heatsource
CAHS03
APPLICATIONS
AMPLIFIER
Negative imped-ance both-wayamplifier
CAAM01
Amplifier withbypass used forsignaling orpower feeding, orboth
CAAM02
Amplifier withexternal direct-current control
CAAM03
DESCRIPTION SYMBOLSYMBOL
NAME
COMPOSITE ASSEMBLIES
16 - 2 Electrical Symbol Library
CHANGER
ChangerGeneral SymbolConverterGeneral Symbol
CACN01
DC converter CACN02
Rectifier CACN03
Rectifier in fullwave (bridge)connection
CACN04
Inverter CACN05
Rectifier/inverter CACN06
Galvanic separa-tor
CACN07
CHOPPER
Chopper CACH
DESCRIPTION SYMBOLSYMBOL
NAME
FIRE EXTINGUISHER
Fire extinguisheractuator head, sin-gle head with con-nectors
CAFE01
Fire extinguisheractuator head,double head withconnectors
CAFE02
GENERATOR
Generator, gen-eral symbol
CAGN01
Thermoelectricgenerator, withcombustion heatsource
CAGN02
Thermoelectricgenerator withnonionizing radia-tion heat source
CAGN03
Thermoelectricgenerator withradioisotope heatsource
CAGN04
Thermionic diodegenerator withnonionizing radia-tion heat source
CAGN05
DESCRIPTION SYMBOLSYMBOL
NAME
COMPOSITE ASSEMBLIES
Electrical Symbol Library 16 - 3
Thermionic diodegenerator withradioisotope heatsource
CAGN06
Photovoltaoc gen-erator
CAGN07
GYRO
GyroGyroscopeGyrocompass
CAGY01
Gyro CAGY02
PHASE SHIFTER
Phase ShifterPhase-ChangingNetwork: 3-wireor 3-phase
CAPS01
Phase ShifterPhase-ChangingNetwork:Applicationadjustable
CAPS02
POSITION INDICATOR
Position indicator:DC synchro type
CAPO01
DESCRIPTION SYMBOLSYMBOL
NAME
Position indicator:Inductor type
CAPO02
Position transmit-ter, Desynn type(de synchro type)
CAPO03
Position transmit-ter, inductor type
CAPO04
RECTIFIER
Rectifier, general CART01
Rectifier, con-trolled
CART02
Bridge-type recti-fier
CART03
Rectifier shownwith terminalsand polaritymarking (heavyline indicatesnameplate or pos-itive-polarity end)
CART04
DESCRIPTION SYMBOLSYMBOL
NAME
COMPOSITE ASSEMBLIES
16 - 4 Electrical Symbol Library
REPEATER
1-way repeater CARP01
2-wire, 2-wayrepeater
CARP02
2-wire, 2-wayrepeater with low-frequency bypass
CARP03
4-wire, 2-wayrepeater
CARP04
RING MODULATOR
Diode-type ringdemodulatorDiode-type ringmodulator
CARM
SENSOR AND DETECTOR
Proximity sensor CASD01
Proximity sens-ing device, blocksymbol
CASD02
DESCRIPTION SYMBOLSYMBOL
NAME
Capacitive prox-imity detectoroperating on theapproach of solidmaterial
CASD03
Touch sensor CASD04
Touch sensitiveswitch, make con-tact
CASD05
Proximity switch,make contact
CASD06
Proximity switch,operated on theapproach of amagnet, makecontact
CASD07
Proximity switch,operated on theapproach of iron,break contact
CASD08
DESCRIPTION SYMBOLSYMBOL
NAME
Electrical Symbol Library 17 - 1
7ANALOG AND DIGITAL LOGIC FUNCTIONS
DESCRIPTION SYMBOLSYMBOL
NAME
ELEMENTS
Analog elementsfor amplifiers,summing
ALSE01
Analog elementsfor amplifiers,integrating
ALSE02
Analog elementsfor amplifiers, dif-ferentiating
ALSE03
Analog elementsfor amplifiers,logarithmic
ALSE04
Delta symbol ALSE05
Infinity symbol ALSE06
APPLICATIONS
AMPLIFIER
Integrator ampli-fier
ALIN
Σ
∫
∆
∞
Operationalamplifier
ALOA
Summing ampli-fier
ALSA
ANALOG COMPUTATION DEVICE
AMPLIFIER
Analog elements,high gain differ-ential amplifier(operationalamplifier)
ALAM01
Analog elements,high gain ampli-fier with a nomi-nal amplificationof 10,000 and twocomplementaryoutputs
ALAM02
Analog elements,inverting ampli-fier with amplifi-cation of 1
ALAM03
DESCRIPTION SYMBOLSYMBOL
NAME
∞
ANALOG AND DIGITAL LOGIC FUNCTIONS
17 - 2 Electrical Symbol Library
Analog elements,amplifier with twooutputs, theupper, noninvert-ing, has an ampli-fication of 2, thelower, nvertingoutput, has anamplification of 3
ALAM04
Analog elements,summing ampli-fier
ALAM05
Analog elements,integrating ampli-fieraaaa
ALAM06
Analog elements,differential ampli-fier (differentia-tor)
ALAMA07
Analog elements,logarithmicamplifier
ALAM08
COEFFICIENT SCALER
Analog elements,coefficient scaler
ALCS
DESCRIPTION SYMBOLSYMBOL
NAME
Σ
∫
COORDINATE CONVERTER
Analog elements,coordinate con-verter, polar torectangular
ALCC01
Analog elements,coordinate con-verter, rectangu-lar to polar
ALCC02
ELECTRONIC SWITCH
Analog element,bidirectionalswitch (make),general symbol
ALES01
Analog elements,example:the analog signalcan pass only inthe direction indi-cated by the arrowas long as the dig-ital input “e”stands at itsdefined 1-state
ALES2
Analog elements,bidirectionalswitch (break),general symbol
ALES03
DESCRIPTION SYMBOLSYMBOL
NAME
θ
θ
θ
θ
ANALOG AND DIGITAL LOGIC FUNCTIONS
Electrical Symbol Library 17 - 3
Analog elements,example:the analog signalcan pass only inthe direction indi-cated by the arrowas long as the dig-ital input “e”stands at thedefined 0-state
ALES04
Analog elements,two independentbidirectionalswitches (onemake and onebreak), both oper-ated by the samebinary input
ALES05
FUNCTION GENERATOR
Analog elements,function genera-tor, general sym-bol
ALFG02
Analog elements,contangent func-tion
ALFG03
SIGNAL CONVERTER
Analog elements,digital to analogconverter
ALSC01
Analog elements,analog to digitalconverter, gen-eral symbol
ALSC02
DESCRIPTION SYMBOLSYMBOL
NAME
n
MULTIPLIER AND DIVIDER
Electronic divider ALED
Electronic multi-plier
ALEM01
Two dependentmultipliers
ALEM02
Electronic func-tion generator
ALFG01
Function potenti-ometer
ALFP
Generalized inte-grator
ALGI
Positional servo-mechanism
ALPS
DESCRIPTION SYMBOLSYMBOL
NAME
[ THIS PAGE LEFT INTENTIONALLY BLANK ]
Electrical Symbol Library 18 - 1
18MAINTENANCE SYMBOLS
DESCRIPTION SYMBOLSYMBOL
NAME
APPLICATIONS
FLOW SIGNAL
Signal code, nor-mal
MSDF01
Signal code,emergency mode
MSDF02
Signal code,automatic mode
MSDF03
Signal code, sec-ondary flow,power diostribu-tion
MSDF04
Signal code, ref-erence signalvoltage, refer-ence frequency
MSDF05
Signal code, sig-nal to energizerelay
MSDF06
Signal code,transmitter pulse;pulse-formingnetwork, dis-charge path, orsubsequent high-level modulationpulse
MSDF07
Signal code,gating; synchro-nizing signal;low-level modu-lating signal
MSDF08
Signal code, testsignal; signalused to light alamp or provide ameter reading
MSDF09
Signal code, feed-back
MSDF10
Fault-signalcode, fault-isola-tion signal torelay
MSDF11
FUNCTIONAL CIRCUIT
Amplifier circuit(such as voltageamplifier, poweramplifier, etc.)
MSFC01
Signal generator;signal processor
MSFC02
Linear element;linear network
MSFC03
Relay contacts MSFC04
Relay coil oroperating coil
MSFC05
DESCRIPTION SYMBOLSYMBOL
NAME
MAINTENANCE SYMBOLS
18 - 2 Electrical Symbol Library
Switch MSFC06
Composite cir-cuit (other thanthose previouslygiven)
MSFC07
DESCRIPTION SYMBOLSYMBOL
NAME