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VM1
Vacuum circuit-breaker
with magnetic actuator mechanism
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VM1.M1.Universal applications.
Power stations
Transformer substations
Chemicals industry
Steel industry
Automobile industry
Airport power supply
Building power supply
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The VM1 vacuum circuit-breaker finds its universalrange of applications
throughout the chain frompower generation inpower stations throughcontrolled distribution intransformer substations tothe final consumer, suchas the chemicals industry,steel industry, automobileindustry, airport andbuilding power supply.
VM1. The circuit-breaker.
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VM1. Qualities that convince.
Maintenance-free
vacuum interrup-
ter and complete
pole part as
a positive unit.
New pole part design.In the VM1 circuit-breaker,pole parts in which themaintenance-free vacuuminterrupter forms a positiveunit together with theentire pole part are usedfor the first time. This is
achieved by a speciallydeveloped embeddingtechnology in which thevacuum interrupter isdirectly potted in epoxyresin to form a pole part.External influenceson the switching elementare therefore extensivelyprecluded.
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G Magnetic actuatorThe heart of the electromagneticallyoperated mechanism with theswitching, latching and releasefunctions.
G Electronic controllerElectronic control of release, opera-ting motion, energy storage andfunctional reliability.
G Lever shaftThe only mechanical component forforce transmission from the magnetarmature to the vacuum interrupter.
G CapacitorElectrical energy store for a completeautoreclosing cycle.
G SensorNon-contact detection of switch position.
VM1.M1.The sum of the benefits.
Few individual parts
Simple mechanical sequences
Extremely high reliability
High quality standardExtremely long life
Maintenance-free
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VM1.M1.The new operating mechanism technology.
Force generation by magnetic actuator
Latching by magnetic actuator
Release by magnetic actuator
No parts subject to wear
Maintenance-free as a standard feature
The innovative
mechanism concept
facilitates a drastic
reduction in
the number of
parts and complete
freedom from
maintenance.
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VM1. Maintenance-free
with magnet technology.
Following the triumphal advanceof the vacuum interrupter in thefield of medium voltage circuit-breakers in the last 20 years, ahighly promising, natural teamhas now been found with ma-gnetic actuator technology.The requirements of one techno-logy are optimally matched bythe opportunities of the other.
Magnet technology naturallyprovides the suitable travel-time
and force-travel characteristics forvacuum switching devices.All operating mechanismfunctions are integrated in themagnetic actuator of the VM1circuit-breaker. The actuator is abi-stable magnet system, in whichswitchover of the armature to therelevant limit position is effectedby the magnetic field of twoelectrically excited coils. Thearmature is held magnetically inthe limit positions by the fieldsof two permanent magnets.Switching operations are releasedby excitation of one of the twocoils until the retaining force ofthe permanent magnets is excee-ded. Even on complete failure ofauxiliary power, electrical operati-on is still possible for a period of60 s. The circuit-breaker canthen be opened by the standardemergency manual operatingsystem.
The characteristics of theactuators magnetic circuit aredesigned in such a way that thearmature can act directly via thelever shaft on the moving con-tact in the vacuum interrupter.With this method of actuatingforce generation and transmissi-on, wear is unknown. Mainte-nance up to extremely highnumbers of operating cycles issimply a thing of the past.
Instantaneous representation ofmagnetic flux density distribution
Armature reaching the opposite limit
position.
Magnetic latching plus current build up
in one coil.
Magnetic latching in a limit position.
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VM1. Circuit-breaker
of the high tech generation.
The selection of a suitable inter-nal power supply with feed viaa UC-DC converter makes theVM1 circuit-breaker independentof the type and also almost ofthe level of auxiliary voltage.The external power consumptionis less than 4 watts when thecircuit-breaker is in the on or offposition.
After an autoreclosing cycle,the power consumption fromthe auxiliary power supply isless than 100 W for only a fewseconds. The energy store notonly provides the necessary coilenergy, but also ensures powersupply to the electronics.The energy content is sufficientfor a buffer time of 60 s onfailure of the auxiliary power.The charge condition is of coursemonitored and displayed.
Careful selection of all compo-nents and reliable design guaran-tee maximum reliability evenunder EMC load.
VM1.M1.The control module with sensors.
EMC proofing by electrical decouplingSelf-monitoring with fault signalling
Independent of auxiliary power supply
Low energy consumption on recharging of the capacitor
Sensor detection of the mechanical switch position
Monitoring of all switching functions
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The electronic
controller with
sensors monitors
all the functions
of the circuit-
breaker and its
own functional
reliability.
The complete electrical isolationfrom the outside also contribu-tes. For an important electroniccontrol system to have a watch-dog function with fault signallingis nowadays a matter of course.The concept of a circuit-breakercontrol system without anyauxiliary switches makes use ofsensors to detect the mechanicallimit positions. The inductive
proximity sensors employed
have proven their worth forthese functions in practice, andare of course also included in theself-monitoring system.
All necessary application-specificinput and output signals areindependent of the type ofauxiliary voltage in accordancewith the rest of the system,and are integrated
by plug-in technology.
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Technical data
Rated voltage kV 12 17.5 24
Rated power frequency withstand voltage kV 28 38 50
Rated lightning impulse withstand voltage kV 75 95 125
Rated current A 3150 1) 3150 2500
Rated short-time current, 3s kA 50 40 25
Rated short-circuit breaking current kA 50 40 25
Rated short-circuit making current kA 125 ...100 63
Mechanical operating cycles
Operating mechanism ...100 000 ...100 000 ...100 000
Vacuum interrupter ...30 000 ...30 000 ...30 000
Operating cycles at rated current ...30 000 ...30 000 ...30 000
Operating cycles at short-circuit current 100 100 100
Power consumption
At rest W 10 10 10
After an autoreclosing cycle W 100 100 100
Operating time
ON, approx.2) ms 4560 4560 4560
OFF, approx.2) ms 3550 3550 3550
Pole centres2) mm 150/210/275 150/210/275 210/275
Distance between upper and
lower contact terminal2) mm 205/310 205/310 310
Height2) mm 475/598/620 475/598/620 631/643
Depth mm 424 424 424
Width2) mm 450/570/600/750 450/570/600/750 570/750
Weight2) kg 90-148 90-148 100-145
1) Breakers for 4000 A with fan cooling2) According to rated values
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The VM1 circuit-break-
er is the first vacuumcircuit-breaker app-
lying a combination of
maintenance-free,
moulded in vacuum
interrupters, mainte-
nance-free magnetic
actuator and mainte-
nance-free electronic
controller without
auxiliary switches
and with sensors.
The result is a com-pletely maintenance-
free circuit-breaker
which functions so
reliably it can simply
be forgotten about!
4
5
6
7
8
9
10
11
13
14
15
16
1
2
3
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VM1. The modern circuit-breaker.
VM1.M1.The equipment characteristics.
Compatible external dimensions
Potted vacuum interrupters
Unchanged power classes
Low power consumption
High quality standard
Completely maintenance-free
7 Insulated coupling rod
8 Lever shaft
9 Stroke adjuster
10 Sensors for switchposition detection
11 Closing coil
12 Permanent magnets
13 Magnet armature
14 Opening coil
15 Emergency manualbreaking mechanism
16 Mechanism enclosurewith magnetic actuator
1 Upper contact terminal
2 Vacuum interrupter
3 Epoxy resin enclosure
4 Lower contact terminal
5 Flexible connector
6 Contact force spring
12 kV
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ABB AG
Calor Emag Medium Voltage Products
Oberhausener Strasse 33 Petzower Strasse 8
40472 Ratingen 14542 Werder (Havel) OT Glindow
GERMANY GERMANY
Phone: +49(0)2102/12-12 30, Fax: +49(0)21 02/12-19 16
E-mail: [email protected]
Internet: http://www.abb.com/mediumvoltage
Leafletno.D
EABB
223303E
PrintedinGermany(06.05-500-PPI)
Note:
We reserve the right to make technical changes or modify the contents of this
document without prior notice. With regard to purchase orders, the agreed
particulars shall prevail.
ABB does not accept any responsibility whatsoever for potential errors
or possible lack of information in this document.
We reserve all rights in this document and in the subject matter and illustrations
contained therein. Any reproduction in whole or in parts is forbidden without
ABBs prior written consent.
Copyright 2005 ABB AGAll rights reserved.
