Contentsitepeyac.com/wp-content/uploads/2017/09/sf6.pdf · • ANSI C57.12.28 Standard for Padmount Enclosures Tests were conducted at recog-nized, independent power testing laboratories,

Contents

SG6 SubsurfacePufferPak Switch

PT6 Pole TopPufferPak Switch

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1

Design Features, Certified Tests and Performance . . . . . . . . . . . . . . . Pages 2-3

Construction Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 4-5

Resettable Fault Interrupters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 6-7

Padmount Switch Styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 8-9

Subsurface and Vault Styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 10-11

Custom Switch Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

Pole Top Switch Styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

Standard Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . Pages 14-17

Typical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 18-19

Typical Installation and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

PG6 Single Side AccessPadmount PufferPak Switch

Type SG6Subsurface Switches

PufferPak subsurface switchesfeature compact, sealed, corro-sion-resistant construction –ideally suited for indoor, outdoor,or underground vault applications.Switch components are containedin a welded, stainless steel tankfactory filled with SF6.

Subsurface switches can bemounted on floor, wall or ceilingfor ease of operation, best cabletraining, and space utilization.Switches can be adapted topadmount applications by usingoptional tamper-resistant enclo-sures.

Subsurface switches are furnishedwith manual operators and stan-dard accessories for normal instal-lation. Units are available in avariety of circuit configurations,tank sizes, and arrangementsdepending upon application.

Popular options include: wall-mounted parking stands, remoteor automatic switching, visiblebreak, operational interlocks,handle position adaptors, andremote cable operators.

Type PT6Pole Top Switches

PufferPak Pole Top switchesfeature compact, sealed, corro-sion-resistant construction ideallysuited for outdoor pole mountedapplications. Switch componentsare contained in a welded, stain-less steel tank factory filled withSF6, making switch ideal for harshand icy conditions.

Available in a variety of mountingconfigurations with the flexibility ofoffering a number of bushingentrances. This unit can beprovided for manual or remoteoperation.

Type PG6, LPG6 and HPG6Padmount Switches

PufferPak padmount switchesfeature deadfront, compact,sealed, corrosion-resistantconstruction and low profile,tamper-resistant enclosures.Switch components are containedin a welded, steel tank factory-filled with SF6. Maintenance isminimized since performance isunaffected by contamination,rodents and flooding.

Padmount enclosures are remov-able for easy installation and main-tenance. Switch accessories,operating handles, and elbowconnections are located for easeof operation and cable trainingwith access through hinged doorsand hood.

Padmount switches are furnishedwith manual operators and stan-dard accessories for normal instal-lation. Units are available withsingle-side access for limitedspace application or double-sideaccess with separate compart-ments for incoming and outgoingcircuits.

Popular options include: remote orautomatic switching; visible break;operational interlocks; and parkingstands.

Type SRG6 and PRG6Fault Interrupter Switches

The Resettable Fault Interrupter(RFI) is an electronically controlledvacuum interrupter offering threephase short circuit protection.Available as a stand alone productor combined with the field provenPufferPak loadbreak switch itoffers deadfront, compact, sealedand corrosion resistant construc-tion. The RFI mechanism can bepackaged in a vault or padmountstyle, still offering all the benefitsassociated with the SF6 technology.

The reliable, microprocessorcontrolled vacuum interrupter elim-inates the need to replace or stockfusing. The RFI module is a 600 Aloadbreak device with a 12kAsymmetrical fault interruptingrating. The electronics are selfpowered, user friendly devicesoffering the ability to field adjustcharacteristics and settings.

Resettable Fault Interrupterswitches are furnished withmanual operators, visual positionindicators and standard acces-sories for normal installation. Unitsare available in a variety of circuitconfigurations, tank sizes andarrangements depending uponapplication.

Popular options include: remote orautomatic switching, visible break(PufferPak only), operational inter-locks, and parking stands.

Other Designs and Applications

PufferPak vault, subsurface andpadmount switching products areconstantly changing. Please con-sult the factory for the latest infor-mation and catalog supplements.

General Information

1

The following data are the result oftests on standard productionPufferPak load break switches.The switches were tested perapplicable portions of IEEE, ANSI,NEMA, and other industry stan-dards including:

• ANSI C37.71 Standard forSubsurface Load InterruptingSwitches.

• ANSI C37.72 Standard forPadmount Load InterruptingSwitches.

• ANSI C37.60 Standard for FaultInterrupters

• ANSI/IEEE 386 Standard forSeparable Connectors andBushings.

• IEC 265 International Standardsfor Load Interrupting Switches.

• ASTM D-2472 Specification forCommercial Type ElectricalGrade SF6.

• ANSI C57.12.28 Standard forPadmount Enclosures

Tests were conducted at recog-nized, independent power testinglaboratories, including KEMA inHolland. Test results were verifiedby oscillograms and high-speed

movies. As required by ANSI stan-dards, all tests were performed ina specific sequence without anymaintenance to the switch or SF6.Tests were conducted at 15.5, 27,and 38 kV levels on approximately75 different switches including 2-,3-, and 4-way configurations.Tosimulate actual service conditions,the tests were run at various SF6gas pressures and with switchesmounted in typical subsurface andpadmount applications.

Switch Design

PufferPak SF6 switches aredesigned and constructed toprovide economical, safe and reli-able switching in a small, light-weight package. Using SF6 forinsulation and arc-interruptioneliminates space, weight andmaintenance costs, as well ashazards associated with vacuum,air or oil-filled equipment. In addi-tion, PufferPak switches provideimproved interrupting and opengap performance.

Switches can be mounted in anyposition and any environment,including Class 1, Division 1,hazardous locations. Maintenanceis minimized with sealed construc-tion that is unaffected by contami-nation, rodents, or floods.

Switch components are containedin a welded, mild or stainless steeltank factory-filled with SF6, elimi-nating exposed live parts andproviding complete deadfront operation.

SF6 Dielectric

Sulfur hexaflouride gas (SF6)contributes to the safety, insulatingand load-interrupting performanceof PufferPak switches. SF6 is non-flammable, non-toxic, colorlessand odorless. At 0 PSIG, SF6 has21⁄2 times the insulating quality ofdry air. Under moderate pressure,insulating and arc-extinguishingqualities increase.

PufferPak switches are shippedpre-filled with SF6, and are electri-cally tested and leak-tested toinsure proper operation. Inside theswitch tank, a special absorbentneutralizes any possible arc by-products, reducing field mainte-nance to an occasional check ofthe color-coded pressure gauge.

Puffer Action

The PufferPak switch capitalizeson the pressure/insulation curve ofSF6, as well as the electronega-tive characteristics of the gas andits ability to absorb and transferheat and free electrons rapidlyfrom an arc.

To amplify the arc-extinguishingabilities of SF6, the switch incorpo-rates a patented, self-generatingpuffer action that forces a pressur-ized stream of SF6 through thecontact area during switching. Thisincreased pressure increases theinsulation level while simultane-ously cooling and extinguishing thearc. In the full-open position, thecontacts are separated by a 3"open gap, giving a 200 kV BILflashover withstand.

Contact System

PufferPak switches feature self-aligning pin-and-socket contactsconstructed of silver-plated copperwith tungsten-copper arcing tips.Contacts are designed to preventdamage to main contact surfacesduring operation, and provideincreased contact pressure withincreased currents in the closedposition.

PufferPak switches incorporateself-cleaning, wiping-type contactsalong with Belleville washers andlocking fasteners at critical currentconnections for long life and maintenance-free operation.

Design Features C e rtified Tests and Pe r fo r m a n c e

2 3

SF6 Puffer action is self-generating using theSF6 contained in the switch tank.Arc extinc-tion occurs at first current zero.

Contact movement createsthe puffer action whichmomentarily increases thedielectric strength and arc-extinguishing properties ofSF6 at the time it is neededduring load break switching.During contact opening (Fig.B), the puffer action forces apressurized stream of SF6through the contact area,cooling and extinguishing thearc at the first current zero.During contact closure (Fig.D), the puffer cone com-presses the column of SF6ahead of the contact, eliminat-ing pre-strike contact damage.In the full-open position (Fig.C), a three-inch gap provides200 kV BIL withstand andpermits DC testing.

Voltage Ratings

Maximum Design Voltage 15.5 kV 27 kV 38kV 15.5 kV RFI 27 kV RFI

Frequency 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz

BIL Impulse withstand 95 kV 125kV 150 kV 95 kV 125 kV

One minute AC withstand 35 kV 60 kV 70 kV 35 kV 50 kV

Fifteen minute DC withstand 66 kV 96 kV 103 kV 53 kV 78 kV

Corona extinction 11 kV 19 kV 26 kV 11 kV 19 kV

Open Gap BIL Flashover withstand 200 kV 200 kV 200 kV 95 kV 125 kV

Current Ratings

Load interrupting and loop switching 600 A 600 A 600 A 600 A 600 A

Transformer magnetizing interrupting 25 A 25 A 25 A 25 A 21 A

Capacitor or cable charging interrupting 40 A 40 A 40 A 40 A 25 A

Asymmetrical momentary and 3 operation fault close - standard.(Optional ratings)*

22,500 A(32,000 A)(40,000 A)

22,500 A(32,000 A)(40,000 A)

22,500 A(32,000 A) 19,200 A 19,200 A

Symmetrical one second rating - standard.(Optional ratings)*

15,000 A(20,000 A)(25,000 A)

15,000 A(20,000 A)(25,000 A)

15,000 A(20,000 A) 12,000 A 12,000 A

Continuous current 600 A 600 A 600 A 600 A 600 A

8 hour overload current 900 A 900 A 900 A

Overload interrupting capability 3,000 A 2,500 A 2,000 A 12,000 A 12,000 A

Operations - 600 A load interrupting endurance 1,000 1,000 1,000Symmetrical 10 cycle phase to phase simulated internal faultwithstand 12,500 A 12,500 A 12,500 A

Application Information and Mechanical Ratings

Sealing systems 10 – 7 cc/second maximum gas leakage

Ambient temperature range -40 to +120 degrees Fahrenheit

Corrosion resistance per ASTM B-117 2000 hours minimum

Mechanical life 2000 operations

SF6 gas normal operating pressure range 2-15 PSIG

*Above ratings may be reduced due to entrances and bushings selected.

Fig. AContactsClosed

Fig. BContactsOpening

Fig. CContacts

Open

Fig. DContactsClosing

SwitchBushing

PufferHousing

ValveSeal

FlexibleConnection

MovingContact

SF6 SF6

PufferCone

SF6

StationaryContact

The following data are the result oftests on standard productionPufferPak load break switches.The switches were tested perapplicable portions of IEEE, ANSI,NEMA, and other industry stan-dards including:

• ANSI C37.71 Standard forSubsurface Load InterruptingSwitches.

• ANSI C37.72 Standard forPadmount Load InterruptingSwitches.

• ANSI C37.60 Standard for FaultInterrupters

• ANSI/IEEE 386 Standard forSeparable Connectors andBushings.

• IEC 265 International Standardsfor Load Interrupting Switches.

• ASTM D-2472 Specification forCommercial Type ElectricalGrade SF6.

• ANSI C57.12.28 Standard forPadmount Enclosures

Tests were conducted at recog-nized, independent power testinglaboratories, including KEMA inHolland. Test results were verifiedby oscillograms and high-speed

movies. As required by ANSI stan-dards, all tests were performed ina specific sequence without anymaintenance to the switch or SF6.Tests were conducted at 15.5, 27,and 38 kV levels on approximately75 different switches including 2-,3-, and 4-way configurations. Tosimulate actual service conditions,the tests were run at various SF6gas pressures and with switchesmounted in typical subsurface andpadmount applications.

Certified Tests and Performance

3

Voltage Ratings

Maximum Design Voltage 15.5 kV 27 kV 38kV 15.5 kV RFI 27 kV RFI

Frequency 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz

BIL Impulse withstand 95 kV 125kV 150 kV 95 kV 125 kV

One minute AC withstand 35 kV 60 kV 70 kV 35 kV 50 kV

Fifteen minute DC withstand 66 kV 96 kV 103 kV 53 kV 78 kV

Corona extinction 11 kV 19 kV 26 kV 11 kV 19 kV

Open Gap BIL Flashover withstand 200 kV 200 kV 200 kV 95 kV 125 kV

Current Ratings

Load interrupting and loop switching 600 A 600 A 600 A 600 A 600 A

Transformer magnetizing interrupting 25 A 25 A 25 A 25 A 21 A

Capacitor or cable charging interrupting 40 A 40 A 40 A 40 A 25 A

Asymmetrical momentary and 3 operation fault close - standard. (Optional ratings)*

22,500 A(32,000 A)(40,000 A)

22,500 A(32,000 A)(40,000 A)

22,500 A(32,000 A) 19,200 A 19,200 A

Symmetrical one second rating - standard.(Optional ratings)*

15,000 A(20,000 A)(25,000 A)

15,000 A(20,000 A)(25,000 A)

15,000 A(20,000 A) 12,000 A 12,000 A

Continuous current 600 A 600 A 600 A 600 A 600 A

8 hour overload current 900 A 900 A 900 A

Overload interrupting capability 3,000 A 2,500 A 2,000 A 12,000 A 12,000 A

Operations - 600 A load interrupting endurance 1,000 1,000 1,000Symmetrical 10 cycle phase to phase simulated internal faultwithstand 12,500 A 12,500 A 12,500 A

Application Information and Mechanical Ratings

Sealing systems 10 – 7 cc/second maximum gas leakage

Ambient temperature range -40 to +120 degrees Fahrenheit

Corrosion resistance per ASTM B-117 2000 hours minimum

Mechanical life 2000 operations

SF6 gas normal operating pressure range 2-15 PSIG

*Above ratings may be reduced due to entrances and bushings selected.

Steel switch tank contains the SF6and provides corrosion-resis-tant protection for the inter-nal parts. All seams andcomponents are T.I.G. welded,utilizing stainless filler rod toassure leak-tight construction.

All external components andaccessories are 300 series stain-less steel or bronze.

Mounting provisions include four9⁄16" diameter holes in bottomchannels on subsurface switches.Padmount switches are supportedby a galvanized steel frame withfour 9⁄16" diameter mounting holesat the bottom.

The padmount enclosure is remov-able, and separate from theswitch. It is mounted to the padwith four 1" diameter concealedholes in the bottom flange.

Lifting provisions consist of twowelded lift eyes at oppositecorners on subsurface andpadmount switches. Padmountenclosures are equipped withrecessed 5⁄8" – 11 blind threadedholes at four corners.

Switch operating handles may beactuated by hookstick or rope.Handles can be permanentlyinstalled, or removed and stored.Operating handle movement isclearly labeled and provides posi-tive position indication. Padlockprovisions allow locking in eitherthe open or closed positions.

All welded switch construction isstandard, eliminating gaskets andO-ring seals for leak-tight, mainte-nance-free service. Bushings areT.I.G. welded to the switch tank.

Operating shafts are sealed by aninternal, flexible, stainless steelbellows and equipped with anexternal protective boot.

Nameplatesclearly showrating informa-tion, bushing-oriented circuitdiagram, andphase identifi-cation for ease of installation andoperation of the switch.

Pressure gauge is color-coded foreasy reading of correct pressureand operating range. Mechanicalprotection is provided by a trans-parent protective dome.

Brass fill valve, sealed andprotected by a threaded brass cap,operates similarly to a tire valveand provides access for filling oraddition of SF6.

Bronze ground lugs located next toeach set of bushings provide quickconvenient connection of tank andcable to system ground.

Construction Details

4

Subsurface switch

bushing bellows

Padmount enclosures are oftamper-resistant construction; theyare made of 12-gauge steel, stiff-ened and cross-kinked for rigidity,painted with zinc rich primer andtwo final coats of dark green finish.Easy opening double doors andhinged hood are provided for fullaccess. Construction includesstainless steel hardware, windstops, penta-head security bolt,recessed padlock provisions and3-point latching.

Steel switch tank contains the SF6and provides corrosion-resis-tant protection for the inter-nal parts. All seams andcomponents are T.I.G. welded,utilizing stainless filler rod toassure leak-tight construction.

All external components andaccessories are 300 series stain-less steel or bronze.

Mounting provisions include four9⁄16" diameter holes in bottomchannels on subsurface switches.Padmount switches are supportedby a galvanized steel frame withfour 9⁄16" diameter mounting holesat the bottom.

The padmount enclosure is remov-able, and separate from theswitch. It is mounted to the padwith four 1" diameter concealedholes in the bottom flange.

Lifting provisions consist of twowelded lift eyes at oppositecorners on subsurface andpadmount switches. Padmountenclosures are equipped withrecessed 5⁄8" – 11 blind threadedholes at four corners.

Switch operating handles may beactuated by hookstick or rope.Handles can be permanentlyinstalled, or removed and stored.Operating handle movement isclearly labeled and provides posi-tive position indication. Padlockprovisions allow locking in eitherthe open or closed positions.

All welded switch construction isstandard, eliminating gaskets andO-ring seals for leak-tight, mainte-nance-free service. Bushings areT.I.G. welded to the switch tank.

Operating shafts are sealed by aninternal, flexible, stainless steelbellows and equipped with anexternal protective boot.

Nameplatesclearly showrating informa-tion, bushing-oriented circuitdiagram, andphase identifi-cation for ease of installation andoperation of the switch.

Pressure gauge is color-coded foreasy reading of correct pressureand operating range. Mechanicalprotection is provided by a trans-parent protective dome.

Brass fill valve, sealed andprotected by a threaded brass cap,operates similarly to a tire valveand provides access for filling oraddition of SF6.

Bronze ground lugs located next toeach set of bushings provide quickconvenient connection of tank andcable to system ground.

Construction DetailsS u b s u r f a c e, Padmount and Pole Top Switch e s

4 5

Subsurface switch

bushing bellows

Padmount enclosure door handles arerecessed and include padlock provision.Penta-head bolt is standard.

Type HPG6 Padmount switches are equippedwith a lightweight easy opening hood foraccess to switch and cable compartment.

Construction Details

Switch Ratings

15.5 and 27 kV voltage classes

600 or 200 Amp continuous andload break switching

Standard 12kA SYM momentaryand fault close

Fault Interrupting Capability

12kA SYM fault interrupting

Field selectable trip settings of 30Amp to 600 Amp

Field selectable time currentcurves - “E” and “K” speeds

Styles

2-, 3-, 4- or 5-way circuitconfigurations

600 Amp deadbreak or 200 Ampdeep-well elbow connections

Three phase interruption

Standard Features

• All welded mild steel switch tank,factory assembled, tested, andfilled with SF6.

• Self powered electronicallycontrolled resettable fault inter-rupter providing three phasecircuit protection.

• NEMA 4 electronic enclosurestandard. NEMA 6P optional.

• Removable operating handlewith padlock provisions, positionindicators, provision for opera-tion by hookstick or rope, andhandle storage.

• 200 Amp deepwell or 600 Ampbushings furnished with protec-tive shipping caps and oneground lug per set of bushings.

• Phase identification tags, name-plate with ratings and connectiondiagram.

• Color-coded pressure gaugewith separate fill valve.

• Lifting and mounting provisions.

• Optional parking stands forcable connections available.

• 12-gauge mild steel, tamper-resistant, single-side accesspadmount enclosure with 3-pointlatch double doors and hingedhood.

• Enclosure equipped with stain-less steel hardware, wind stops,padlock provision and penta-head bolt. Enclosure painteddark green.

Resettable Fault InterruptersPadmount Style

6

SwitchConfiguration

CatalogNumber

ModelNumber

MaxkV

WDim.In.

HDim.

In

DDim.

In

Wt.Lbs.

Approx.

2 WAY

PRG6-22-15PRG6-22-27

6T6T

15.527

41 45 52 725

3 WAY

PRG6-33-15PRG6-33-27

6T66T6

15.527

53 45 52 925

4 WAY

PRG6-44-15PRG6-44-27

6TT66TT6

15.527

65 45 52 1175

5 WAY

PRG6-55-15PRG6-55-27

6TTT66TTT6

15.527

65 45 52 1175

Notes: Consult factory for other configurations.Replace “6” with “2” in model number for 200A deepwell bushings.Replace “T” with “S” in model number for 600A apparatus bushings on RFI ways.

Switch Ratings

15.5 and 27 kV voltage classes


Standard 12kA SYM momentaryand fault close

Fault Interrupting Capability

12kA SYM fault interrupting

Field selectable trip settings of 30Amp to 600 Amp

Field selectable time currentcurves - “E” and “K” speeds

Styles

2-, 3-, 4-, 5- or 6-way circuitconfigurations

600 Amp deadbreak or 200 Ampdeep-well elbow connections

Three phase interruption

Standard Features

• All welded stainless steel switchtank, factory assembled, tested,and filled with SF6.

• Self powered electronicallycontrolled resettable fault inter-rupter providing three phasecircuit protection.

• NEMA 4 electronic enclosure,standard. NEMA 6P available.






Vault and Subsurface Style

7

SwitchConfiguration

CatalogNumber

ModelNumber

MaxkV

WDim.In.

HDim.

In

DDim.

In

Wt.Lbs.

Approx.

2 WAY

SRG6-22-15SRG6-22-27

6T6T

15.527

20 23.3 30 210

3 WAY

SRG6-33-15SRG6-33-27

6T66T6

15.527

25 23.3 30 320

4 WAY

SRG6-44-15SRG6-44-27

6TT66TT6

15.527

36.5 23.3 30 550

5 WAY

SRG6-55-15SRG6-55-27

6TTT66TTT6

15.527

48.5 23.3 30 700

6 WAY

SRG6-66-15SRG6-66-27

6TTTT66TTTT6

15.527

60.5 23.3 30 850

Notes: Consult factory for other configurations.Replace “6” with “2” in model number for 200A deepwell bushings.Replace “T” with “S” in model number for 600A apparatus bushings on RFI ways.

Ratings

15.5, 27, and 38 kV voltageclasses


Standard 22.5 kA ASYM momen-tary and fault close

Optional 32/40 kA ASYM momen-tary and fault close+

Styles

2, 3, or 4-way circuit configurations

600 Amp deadbreak or 200 Ampdeepwell elbow connections

Three phase or single phase

Standard Features

• All welded mild steel switch tank,factory assembled, tested, andfilled with SF6.




• Color-coded pressure gauge andbrass fill valve.


• 12-gauge mild steel, tamper-resistant, single-side accesspadmount enclosure with 3-pointlatch double doors and hingedhood. Equipped with stainlesssteel hardware, wind stops,padlock provision and penta-head bolt. Enclosure painteddark green.

Padmount Applications

8

WIDTH 42"

45"

Three Phase PG6Single Side AccessPadmount Switch

SwitchConfiguration

3-PhaseCatalogNumber


Model NumberReplace “X” with “2”

for 200 A Bushing“6” for 600 A Busing

MaxkV

Width*Dim.

Inches

Wt.*Lbs.

Approx.

2 WAY - 1 SWITCHED

PG6-21-15PG6-21-27PG6-21-38

PG61-21-15PG61-21-27PG61-21-38

X XX XX X

15.52738

41 700

3 WAY - 2 SWITCHED

PG6-32-15PG6-32-27PG6-32-38

PG61-32-15PG61-32-27PG61-32-38

X X XX X XX X X

15.52738

53 1100

3 WAY - 3 SWITCHED

PG6-33-15PG6-33-27PG6-33-38

PG61-33-15PG61-33-27PG61-33-38

X X XX X XX X X

15.52738

53 1200

4 WAY - 2 SWITCHED

PG6-42-15PG6-42-27PG6-42-38

PG61-42-15PG61-42-27PG61-42-38

X X X XX X X XX X X X

15.52738

65 1400

4 WAY - 4 SWITCHED

PG6-44-15PG6-44-27PG6-44-38

PG61-44-15PG61-44-27PG61-44-38


15.52738

65 1600

Ordering Information: Select switch configuration and voltage class, specifycatalog number, model number and options.

* Width and Wt. shown is for 3 phase switches. For 1 phase switches: W = 41" for all units and Wt. is asfollows: 2 way = 300 lbs.; 3 way = 400 lbs.; 4 way = 500 lbs.

+ To specify optional 32/40kA ASYM rating add /32/40 to catalog number. Example: PG6-21-15/32.

THREE PHASE AND SINGLE PHASE SINGLE SIDE ACCESSPADMOUNT SWITCHES

Optional Padmount Enclosures

Standard PufferPak subsurfaceswitches may be adapted for usein padmount applications by speci-fying an Optional PadmountEnclosure shown on page 15. Theenclosure will house any of thesubsurface switches shown onpages 10 thru 12. The result is anattractive, tamper-resistantpadmount switch with plenty ofroom for installation, operation andcable training.

9

PufferPak LPG low profilepadmount switches aredesigned and constructed perANSI standard C37.72.Bushings, parking stands andoperating handles are located toallow hookstick operation.

Three and four-way switchesincorporate double-sidedaccess to the operatingcompartments. Units are 40"high x 72" wide x 84" deep.

Ordering Information: Select switch configuration and voltage class.Specify catalog number, model number and options.

Single or Three Phase HPG6Padmount Switches withHinged Access Hood

To order hooded stylepadmount switch, refer to PG6catalog information on page 8,adding H to catalog number.For example, HPG6-44-15.

Single Phase PG6 Single SideAccess Padmount Switch

LPG Low ProfilePadmount Switches

THREE PHASE LOW PROFILE PADMOUNT SWITCHES

SwitchConfiguration


Model NumberReplace “X” with

“2” for 200 A Bushing“6” for 600 A Busing

MaxkV

Wt.Lbs.

Approx.

3 WAY - 3 SWITCHED

LPG6-33-15LPG6-33-27LPG6-33-38

X X XX X XX X X

15.52738

1400

4 WAY - 4 SWITCHED

LPG6-44-15LPG6-44-27LPG6-44-38


15.52738

1600

Note: 32/40 kA ASYM rating not available on LPG switches.

12 Gauge Steel, Tamper-ResistantConstruction, Painted Green

Hinged,Packlockable,Door Vent Panels

Ratings

15.5, 27, and 38 kV voltageclasses


Standard 22.5 kA ASYM momen-tary and fault close

Optional 32/40 kA ASYM momen-tary and fault close+

Styles

2, 3, or 4-way circuit configurations

600 Amp deadbreak or 200 Ampdeepwell elbow connections

Three phase or single phase

Standard Features

• All welded stainless steel switchtank, factory assembled, tested,and filled with SF6.

• Removable operating handleswith padlock provisions, positionindicators, provision for opera-tion by hookstick or rope.



• Color-coded pressure gauge andbrass fill valve.


Subsurface and Vault Applications

10

Three PhaseSubsurface

Switch

Ordering Information: Select switch configuration and voltage class, specify catalog number, model number and options.

SIDE VIEW

FRONT VIEW

THREE PHASE SUBSURFACE SWITCHES

SwitchConfiguration

CatalogNumber

Model NumberReplace “X” with “2”

for 200 A Bushing“6” for 600 A Busing

MaxkV

Wt.Lbs.

Approx.

Width*Dim.

Inches

2 WAY - 1 SWITCHED

SG6-21-15SG6-21-27SG6-21-38

X XX XX X

15.52738

150 16 1⁄2

3 WAY - 3 SWITCHED

SG6-33-15SG6-33-27SG6-33-38

X X XX X XX X X

15.52738

225 20

3 WAY - 2 SWITCHED

SG6-32-15SG6-32-27SG6-32-38

X X XX X XX X X

15.52738

200 20

4 WAY - 4 SWITCHED

SG6-44-15SG6-44-27SG6-44-38


15.52738

300 25

4 WAY - 3 SWITCHED

SG6-43-15SG6-43-27SG6-43-38


15.52738

275 25

4 WAY - 2 SWITCHED

SG6-42-15SG6-42-27SG6-42-38


15.52738

250 25

3 WAY - 3 SWITCHED

SG6-33-15/SVSG6-33-27/SVSG6-33-38/SV


15.52738

225 25

4 WAY - 4 SWITCHED

SG6-44-15/SVSG6-44-27/SVSG6-44-38/SV

X X X X X XX X X X X XX X X X X X

15.52738

450 36 1⁄2

+ Note: To specify 32/40 kA ASYM optional rating add /XX to Catalog Number.Example: SG6-21-15/32 OR SG6-21-15/40.

* Spread Version - Bushings spaced for direct elbow connection.

Subsurface and Vault Applications

11

Single Phase Subsurface Switch

Vault Switch

SIDE VIEW

FRONT VIEW

SINGLE PHASE SUBSURFACE SWITCHES

THREE PHASE VAULT SWITCHES

SwitchConfiguration

CatalogNumber

Model NumberReplace “X” with “2”for 200 A Bushing “6”

for 600 A Busing

Max.kV

Wt.Lbs.

Approx.

WidthInches

2 WAY - 1 SWITCHED

SG61-21-15SG61-21-27SG61-21-38

X XX XX X

15.52738

100 16 1⁄2

3 WAY - 3 SWITCHED

SG61-33-15SG61-33-27SG61-33-38

X X XX X XX X X

15.52738

175 20

3 WAY - 2 SWITCHED

SG61-32-15SG61-32-27SG61-32-38

X X XX X XX X X

15.52738

150 20

4 WAY - 4 SWITCHED

SG61-44-15SG61-44-27SG61-44-38


15.52738

250 25

4 WAY - 3 SWITCHED

SG61-43-15SG61-43-27SG61-43-38


15.52738

225 25

4 WAY - 2 SWITCHED

SG61-42-15SG61-42-27SG61-42-38


15.52738

200 25

25"

9 3⁄4" WIDTH

SwitchConfiguration

CatalogNumber

Model NumberReplace “X” with “2”for 200 A Bushing “6”

for 600 A Busing

MaxkV

Wt.Lbs.

Approx.

WidthDim.

Inches

2 WAY - 1 SWITCHED

VG6-21-15VG6-21-27VG6-21-38

X XX XX X

15.52738

140 211⁄2

+ Note: To specify 32/40 kA ASYM optional rating add /XX to Catalog Number.Example: SG6-21-15/32 OR SG6-21-15/40.

+ Note: To specify 32/40 kA ASYM optional rating add /XX to Catalog Number.Example: VG6-21-15/32 or VG6-21-15/40.

Ratings

15.5, 27 and 38 kV voltageclasses

600 Amp continuous and loadbreak

22.5 kA ASYM momentary andfault close standard

Consult factory for 32 kA ratings

Style

2-way, 3-phase group operated

Standard Features

• All welded, stainless steelsealed construction.

• Horizon Grey finish coatingkeyed to environment.

• SF6-Puffer arc-quenching, load-break technology.

• Factory tested and filled withSF6.

• Crossarm mounting w/ j-boltsand lifting provisions.

• Manual operating lever w/ hook-stick provisions.

• Positive position indicators w/ padlock provisions.

• Molded rubber insulators for lineconnections.

• 200 Amp deepwell or 600 Ampbushings for elbow connections.

• Corrosion-resistant nameplate w/ rating and line diagram.


PufferPak designs are modular inconcept, permitting a wide varietyof switching configurations to meetparticular application needs.Custom designs tailor the standardPufferPak construction features tospecific switching requirements

Top/End Subsurface Switches

Top/End subsurface switches arean example of the flexibility avail-able in PufferPak switches. Thisunit locates the cable connectionbushings on the sides as well asthe top of the switch, to provide acompact unit with increased cabletraining versatility.

Custom Circuit Configurations

5-way, 6-way and double-loopswitches are examples of thecustom circuit configurations avail-able with PufferPak switches. The5- and 6-way switches extend thenumber of circuit connectionsavailable in a single tank enclo-sure. Double-loop switches incor-porate a bus-tie configuration forload splitting and balancing.

Special Ratings

PufferPak switches are availablewith ratings to match the mostsevere system requirementsincluding special operating volt-ages, higher impulse withstand,and 32/40 kA ASYM momentary/fault close ratings. Please contactthe factory for further informationand application assistance.

Custom Switching Applications Pole Top Switch e s

12 13

TG6 switch with top-end bushingarrangement.

SG6 switch with top mounted spread versionbushing arrangement.

TOP/END SWITCHES AND 4-WAYTHRU 6-WAY SWITCHES

Crossarm Mounting

Pole MountingSwitch

Configuration

TG6 Cat.No. SG6 Cat.No. MODEL NUMBERReplace “X”with

“2” for 200 A Bushing“6” for 600 A Bushing

TG6*WidthInches

TG6Wt.Lbs.Approx.

SG6*WidthInches

SG6Wt.Lbs.

Approx.Replace “XX”with 15 for 15.5 kV,

27 for 27 kV or 38 for 38 kV

4 WAY - 4 SWITCHED

N/A

TG6-44-XX/SV

SG6-44-XX

SG6-44-XX/SV

X X X X

X X X X

N/A

361⁄2

N/A

450

25

361⁄2

300

450

5 WAY - 5 SWITCHED

TG6-55-XX

TG6-55-XX/SV

SG6-55-XX

SG6-55-XX/SV

X X X X X

X X X X X

361⁄2

481⁄2

475

550

361⁄2

481⁄2

475

550

6 WAY - 6 SWITCHED

N/A

TG6-66-XX/SV

SG6-66-XX

SG6-66-XX/SV

X X X X X X

X X X X X X

N/A

481⁄2

N/A

575

361⁄2

601⁄2

500

650

4 WAY - DOUBLELOOP

N/A

TG6-45-XX/SV

SG6-45-XX

SG6-45-XX/SV

X X X X

X X X X

N/A

481⁄2

N/A

550

36 1⁄2

481⁄2

475

550

5 WAY - DOUBLELOOP

N/A

TG6-56-XX/SV

SG6-56-XX

SG6-56-XX/SV

X X X X X

X X X X X

N/A

481⁄2

N/A

575

481⁄2

601⁄2

575

650

6 WAY - DOUBLELOOP

TG6-67-XX

TG6-67-XX/SV

SG6-67-XX

SG6-67-XX/SV

X X X X X X

X X X X X X

481⁄2

601⁄2

600

675

481⁄2

601⁄2

600

675

Ordering Information: Select switch configuration and voltage class, specify catalog number, model number and options.

N/A = Design not available*See page 10 for additional dimensional information.

W

213⁄4

16"

.81

4

81⁄2

1.69 Dia.

155⁄16

Approx.

411⁄2 Approx.

81⁄2

21° Typ.

B

Closed Position

OpenPosition

53⁄4

157⁄8

243⁄4

93⁄8

TOP VIEW FRONT VIEW

DIRECT POLE MOUNTING

15 AND 27 kV DIMENSIONS

BRACKET MOUNTING

SIDE VIEW23⁄16

Ratings

15.5, 27 and 38 kV voltageclasses

600 Amp continuous and loadbreak

22.5 kA ASYM momentary andfault close standard

Consult factory for 32 kA ratings

Style

2-way, 3-phase group operated

Standard Features

• All welded, stainless steelsealed construction.

• Horizon Grey finish coatingkeyed to environment.

• SF6-Puffer arc-quenching, load-break technology.

• Factory tested and filled withSF6.

• Crossarm mounting w/ j-boltsand lifting provisions.

• Manual operating lever w/ hook-stick provisions.

• Positive position indicators w/ padlock provisions.

• Molded rubber insulators for lineconnections.

• 200 Amp deepwell or 600 Ampbushings for elbow connections.

• Corrosion-resistant nameplate w/ rating and line diagram.


Pole Top Switches

13

Crossarm Mounting

Pole Mounting

W

213⁄4

16"

.81

4

81⁄2

1.69 Dia.

155⁄16

Approx.

411⁄2 Approx.

81⁄2

21° Typ.

B

Closed Position

OpenPosition

53⁄4

157⁄8

243⁄4

93⁄8

TOP VIEW FRONT VIEW

DIRECT POLE MOUNTING

15 AND 27 kV DIMENSIONS

BRACKET MOUNTING

SIDE VIEW23⁄16

Visible Break

Visible break option allows directviewing of the switch contacts inthe open and closed positionsthrough clear puffer tubes andwindows located on the switchtank.

Neon Voltage Indicators

Available for 200 or 600 Ampelbow connectors, neon voltageindicators conveniently attach tothe elbow test point provision toprovide a flashing signal indicatingthe connection is energized duringswitching operations. Neon voltageindicators may be removed orreplaced by a hot stick.

14

1 SF6 puffer load break switching with ratings and perfor-mance per ANSI C37.71, C37.72 and C37.60 S S S S

2 Deadfront, submersible, non-venting, corrosion-resistant construction S S – –

3 Spring operated manual switching with positive positionindication and padlock provisions S S S S

4 Mounting, lifting, grounding provisions S S S S

5 Phase identification, circuit diagram and rating name-plates S S S S

6 SF6 pressure gauge and fill valve S S S S

7 Provision for 200A or 600A elbow connections S S S S

8 Three-phase resettable circuit protection S – – –

9 Field selectable trip settings S – – –

10 Visible break with contacts visible through viewingwindows and clear puffer tubes – O O O

11 Visible break by external neon voltage indicator lights O O O –

12 Operating handle orientation adaptors O O O –

13 Mechanical or key interlocks O O O –

14 Manual switching with remote cable operator O O O O

15 Motor-operators for local, remote or SCADA switching O O O O

16 Motor-operators, voltage and current sensors forAutomatic Load Transfer Switching O O O O

17 Equipment mounted parking stands O – S –

18 Wall mounted parking stand O O – –

Puffer Pak subsurface, padmount, andpole top switches can be customizedfor a particular application using thestandard options and accessoriessummarized here.

Po

le Top

Mo

dels

Pad

mo

un

t Mo

dels

Sin

gle S

ide A

ccess

Vau

lt/Su

bsu

rfaceM

od

els

Resettab

le Fau

ltIn

terrup

ter (RF

I)

O - Optional Accessory S - Standard Feature (–) - Not Applicable

Standard Options and Accessories

Visible Break

Visible break option allows directviewing of the switch contacts inthe open and closed positionsthrough clear puffer tubes andwindows located on the switchtank.

Neon Voltage Indicators

Available for 200 or 600 Ampelbow connectors, neon voltageindicators conveniently attach tothe elbow test point provision toprovide a flashing signal indicatingthe connection is energized duringswitching operations. Neon voltageindicators may be removed orreplaced by a hot stick.

PadmountEnclosuresfor Subsurface Switches

Extend the flexibility of subsurfaceswitches to include padmountapplications. Standard enclosuresare 60" HIGH x 72" WIDE x 54"DEEP and will house 2- thru 6-waysubsurface switches. The tamper-resistant enclosure provides plentyof room for cable training andswitch operation with easy accessthru a padlockable door.

Enclosures are constructed ofweather-resistant 12-gauge mildsteel, painted dark green.Enclosures are shipped knockeddown, and come with stainlesssteel hardware, wind stops, vent-ing, lifting, mounting provisionsand instructions for easy fieldassembly.

Parking Stands

Parking stands provide for ground-ing, testing, and isolating cableconnections.Wall-mounted parkingstands allow convenient elbowremoval from subsurface switchesin vault or padmount applications.Equipment-mounted parkingstands are standard on LPG6switches and are optional on PG6,PRG6, SRG6, AND SG6.

Operating Handle Adapters

Operating handle adapters allowangle of handle to be changed forconvenient switch operation inlocations where the standardhandle is inadequate. Adaptorsbolt directly to operating handlesfor 45, 90, or “universal” 15 degreeoperating positions.

Mechanical Interlocks

Mechanical interlocks prevent suchunwanted operations as parallelingof feeders – a moveable stainlesssteel bar prevents the closing ofone switch unless adjacent switchis open. Interlocks are bolt-on, andhookstick operable, and permit allstandard operation features of theswitch.

S t a n d a rd Options and Accessories

14 15

1 SF6 puffer load break switching with ratings and perfor-mance per ANSI C37.71, C37.72 and C37.60 S S S S

2 Deadfront, submersible, non-venting, corrosion-resistant construction S S – –

3 Spring operated manual switching with positive positionindication and padlock provisions S S S S

4 Mounting, lifting, grounding provisions S S S S

5 Phase identification, circuit diagram and rating name-plates S S S S

6 SF6 pressure gauge and fill valve S S S S

7 Provision for 200A or 600A elbow connections S S S S

8 Three-phase resettable circuit protection S – – –

9 Field selectable trip settings S – – –

10 Visible break with contacts visible through viewingwindows and clear puffer tubes – O O O

11 Visible break by external neon voltage indicator lights O O O –

12 Operating handle orientation adaptors O O O –

13 Mechanical or key interlocks O O O –

14 Manual switching with remote cable operator O O O O

15 Motor-operators for local, remote or SCADA switching O O O O

16 Motor-operators, voltage and current sensors forAutomatic Load Transfer Switching O O O O

17 Equipment mounted parking stands O – S –

18 Wall mounted parking stand O O – –

Puffer Pak subsurface, padmount, andpole top switches can be customizedfor a particular application using thestandard options and accessoriessummarized here.

O - Optional Accessory S - Standard Feature (–) - Not Applicable

Wall mounted parking stands may beattached to the sides of the switch or to thevault.

Parking stands are standard on LPG6 andare located next to each bushing as shownabove.

Photo shows typical parking stand arrange-ment for PG6 and HPG6 switches.

S t a n d a rd Options and Accessories

Key Interlocks

Key interlock provisions may beadded to switch operating handlesto coordinate operation with otherequipment such as preventingaccess to an energized compart-ment. The stainless steel bolt-oninterlock provision will accept anystandard B1E keylock. Whenordering, specify desired lockingarrangement: lock in closed posi-tion; lock in open position; or lockin both open and closed position.

SF6 Refill Cylinders

SF6 refill cylinders provide a light-weight, convenient method ofadding SF6 to a switch in the fieldshould it ever become necessary.Tank contains enough SF6 forseveral refills.Kit includestank, regu-lator,valve andhoseconnection tothe fill valve onthe switch.

Fused PufferPak Switches*

Fused PufferPak Switches provideovercurrent protection for cableruns, transformers, motors, capaci-tor banks and other distributionsystem equipment.

SF6 Power Fuses, rated 3 thru200 Amp, are non-venting andcontained within bushing-connected molded rubber fuse-holders. Fuses are deadfront,submersible, hotstick replaceableand elbow-connected to the load-side.

Current Limiting Fuse

Current limiting fuses, rated 40Amp maximum, are containedwithin drywell fuseholders attachedto the switch. The fuseholderseals and protects the fuseduring operation and allowshotstick removal andreplacement.

Remote Cable Operators

Remote cable operators provideremote manual switching wherehookstick, rope, or motor-driveswitching prove impractical. A flexi-ble, armored cable connects theswitch operating handle to aremote rotary crank. Turning thecrank operates the switch.Included are position indicators,padlock provisions and mountingbrackets for bolt-on attachment toswitch. Standard cable length is 20feet with other lengths available in10 foot increments.

Standard Options and Accessories

16

Remote cableoperatorconnection toswitch tankand operatinghandle.

Remote Operation with SCADAInterface

PufferPak SF6 switches can beeasily upgraded for SCADA or fullyautomatic operation with the addi-tion of state-of-the-art motor oper-ators, controls, and current andvoltage sensors as required.

Standard operating voltage is 24VDC using a self-contained batteryand charger which can beconnected to any convenientcustomer-supplied 120 VACsource. For manual override inemergency situations, the motoroperators are fitted with quickdisconnect pins, which allowmanual operation of the switch inthe normal manner.

Control of the motor operators isattained using state-of-the-artcurrent-sensing logic, eliminatingthe need for mechanical limitswitch adjustment in the field.

Electronic controls are containedin a NEMA 4 enclosure, withswing-out panel, and a hinged,padlockable door, along with 20 ft.of control cable for each motor.NEMA 6P bolted cover style enclo-sures are also available forsubmersible applications.

SCADA interface is provided toaccept either customer suppliedRTU, or a complete packageincluding RTU can be supplied.Various protocols are supported.Consult factory for details.

Automatic Transfer Control

The micro-processor based auto-transfer control is ideal for main-taining power to critical loads suchas hospitals, airports, shoppingcenters, etc. A user-friendly LCDdisplay allows field personnel toscroll through various parameters,following explicit, easy instructions.

The auto-transfer control is basi-cally a IED with on board SCADAcapability, removing need for sepa-rate RTU in various applications.

Several configurations are avail-able including preferred/non-preferred feeder selection, as wellas make before break on thereturn transfer to prevent a secondoutage to customers.

For non-protected loads, fault indi-cators are supplied to preventtransfer of a feeder onto a faultedcircuit.

Switch Automation Options

17

Pushbutton and SCADA control components

Quick disconnect motor attachmentVoltage and current sensors are

available for both200 or 600 Amp

elbows.

General

This specification outlines therequirements for manually oper-ated SF6 filled load break switchesfor:

m Subsurface

m Padmount applications

m Pole Top

The switch shall be:

m Single phase

m Three phase, withm 2-way m 5-waym 3-way m 6-waym 4-way m other

circuit configuration. The unit willinclude 200 Amp deepwell or 600Amp bushings per ANSI/IEEE 386.A one line diagram indicating thecircuit configuration, number ofswitched ways, and type of bush-ings required will accompany thisspecification.

Switches must be furnishedfactory filled with an electricalgrade of non-toxic, non-flammableSF6 gas, conforming to ASTM D-2472. A pressure gauge whichprovides visual status of both theinsulating and interrupting dielec-tric must be included. 100%production testing shall include amass spectrometer leak test,contact resistance, AC one minutewithstand and corona extinctiontests.

The completed unit must be capa-ble of withstanding internal failurewithout explosion or fire and shallbe capable of being mounted inany position for best cable trainingand operation.

Switch Construction

The switch shall use deadfront,compact, sealed construction. Thecontact system, interconnectingbus, operating mechanisms, andbushings shall be enclosed by acorrosion-resistant mild or stain-less steel tank. The switch mustbe maintenance free, all weldedconstruction, eliminating the use ofgasketed seals. T.I.G. inert gaswelding with stainless steel fillerrod shall be used to eliminatepinhole leaks and corrosion.

The operating shafts must besealed by a flexible metal bellows(O-ring type seals are not accept-able).

Unless otherwise specified, cableconnections, and operating acces-sories shall be located so onlysingle side access is required foroperation and installation.Operating handles shall be capa-ble of being removed and storedor permanently attached.

Movement of the operatinghandles will actuate an internalspring mechanism causing theswitch contacts to open or closeand latch into position.

The spring operator will usecompression springs for long lifeand will provide positive positionindication. The switch contacts andinterconnecting bus shall be platedcopper with Belleville washers andlocking fasteners to provideconsistent pressure at boltedconnections. The contacts shall beself-aligning, wiping type, incorpo-rating tungsten copper arcing tipsto prevent wear.

A puffer contact system for fast arcextinction along with a specialinternal absorbent shall be usedfor improved performance and toprevent arc by-products.

Switches shall Include:

• Operating handles with padlockprovisions in the open andclosed position, capable of oper-ation by hookstick or rope withdirection of movement clearlyindicated.

• Stainless steel nameplatesproviding information includingratings, contact position indica-tion, circuit configuration andphase identification.

• Color coded pressure gauge forvisual indication of normal oper-ating range, enclosed in aprotective housing to preventdamage.

• Brass filled valve for field addi-tion of SF6, protected andsealed with a removable cap.

• 4/0 AWG clamp type groundlugs, one for each set of bushings.

• Stainless or mild steel switchtank for maximum corrosionresistance.

• 200 Amp deepwell or 600 Ampbushings, with protective ship-ping caps (elbows and insertsfurnished by user).


Typical Specifications

18

Ratings and Performance

The load break switch shall betested and rated per ANSI C37.71and C37.72.

Padmount EnclosureConstruction

For padmount installations, atamper-resistant housing shall beprovided. The enclosure will beconstructed of 12-gauge-thick mildsteel, stiffened and cross-kinkedfor watershed and rigidity. Allflanges shall overlap and interlockto discourage unauthorized entry.The design shall incorporate singleside access to minimize thenecessary space required foroperation. Access to the switchand cable compartments shall bethru lightweight hinged doors andhood. The enclosure will becompletely removable from theswitch to facilitate installation,maintenance, and, if necessary,replacement.

Padmount enclosures shallinclude:

• Recessed, 5/8"-11 threaded lift-ing provisions.

• Recessed padlock provision withpenta-head security bolt.

• Mounting provisions using inter-nal flange for anchoring.

• 300 series stainless steel hard-ware with the enclosure painteddark green (Munsell #7.0 GY3.29/1.5) 3 MIL thick over a zincrich primer.

• Door stops and stays to preventaccidental closing.

Pole Top Construction

For Pole Top installations, thebushings shall be designed andtested per ANSI 386 in 200 Ampdeepwell or 600 Amp apparatusstyle as required for elbowconnections or shall be 600 Ampstyle fitted with molded rubberinsulators for connection to airinsulated distribution lines.

Fault Interrupting SwitchConstruction

The load taps of padmount orsubmersible style switches shallbe complete with a ResettableFault Interrupter (RFI).

The interrupter shall be resettablewith no consumable parts (e.g.fuses). As a safety precaution, theinterrupter shall incorporate a tripfree mechanism, which will causethe device to trip open in the eventthat the operator should close intoa fault, with no effect felt throughthe operating handle.

The interrupter shall be a truethree-phase internal mechanism.Devices that are mechanicallyganged externally are not acceptable.

The interrupter shall also act as athree-phase group operated load-break switch.

Interrupter status shall be providedby means of a mechanical positionindicator consisting of a magneticstrip activated by a vertical rodconnected to the moving contactof the vacuum interrupter.

Over current sensing shall beaccomplished with an electronictrip control. The control shall useexternal current transformers tosense and monitor load currents.Trip and time-current curves shallbe field selectable. Trip settingmay be changed while switch is energized so that service is notinterrupted.

An optional LCD display, or RS232port shall be provided in order toobtain real time current data andtime and cause of last trip.

Electronic control shall be suitablefor future remote trip and/or resetvia supervisory control.

Typical Specifications

19

Typical Switch Installation

PufferPak switches are shippedfactory filled with SF6 and includeall necessary accessories forinstallation except for elbows,which are furnished by the user.

1. Uncrate, attach handles, andcheck operation.

2. Mount switch into position,leaving sufficient room for cabletraining and operation. Install tofloor, ceiling, or walls for bestutilization of space.

3. Train and connect cables andground leads. Elbow adaptorsand extensions may be used toaid cable training or facilitate200 Amp connections.

4. Energize and operate switchwithin its ratings.

Switch Operation

To open or close switch, moveoperating handle toward desiredposition. At the end of the handletravel, an internal spring-operatedmechanism will move contacts toposition shown on indicator. Theswitch may be operated remotelyusing a hookstick or rope and maybe padlocked into position.

Application and Practical Usageof SF6

The application of gas-filled equip-ment requires some knowledge ofthe practical handling of SF6. Thefollowing considerations can helpin establishing the proper operat-ing procedures.

A. Availability andSpecifications

SF6 is readily available from anyof several suppliers, including

Allied Chemical and Air Products.The use of commercial-grade SF6per ASTM D-2472 is recom-mended and may be obtained incylinder sizes ranging from 6 to115 lbs. SF6 is a colorless, odor-less, non-toxic, and non-flammablegas.

B. Operating and Maintenance

PufferPak switches have beendesigned and evaluated using thelevels established by ANSI C37.71standards, which assures thenormal life of the equipment with-out any maintenance. In practice,as long as the design ratings arenot exceeded, the only mainte-nance required is the regularmonitoring of SF6 pressure andchecking of the equipment forproper working condition. Theswitch is equipped with a color-coded pressure gauge which indi-cates the quantity of SF6 gas andthe quality of the sealing system.

C. Field Adding of SF6

Switches are shipped factory filledwith SF6 to approximately 10PSIG. Although gauge pressurevaries with temperature, the switchshould always be operated withinits normal pressure range of 2-15PSIG. If field addition of SF6becomes necessary, add the SF6through the fill valve provided onthe tank.

Installation and Operation

20

Typical Padmount Application

Subsurface Switch withOptional Padmount Enclosure Subsurface Application Subsurface Vault Application

Contentsitepeyac.com/wp-content/uploads/2017/09/sf6.pdf · • ANSI C57.12.28 Standard for Padmount Enclosures Tests were conducted at recog-nized, independent power testing laboratories,

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