Solid Dielectric, Triple Option Reclosers€¦ · Viper ST 2011 r3_9253_FINAL 3/28/11 1:20 PM Page 8. Page 9 PADMOUNT APPLICATIONS For applications where space is limited at the substation

CATALOG VST11April, 2011

• Reliable performance

• Works directly with the popular SEL-651R control

• Operator safety including mechanical block

• Maintenance-free operation

• Overhead, substation and dead-front padmount designs

• Ease of installation

• Ease of automation

• Internal voltage sensing

• Application flexibility

• Various module configurationsfor circuit connection flexibility

• Smart Grid/LazerTM solutions

• RUS accepted

Solid Dielectric,Triple Option ReclosersProviding electronic overcurrent protection for

single or three phase operation on systems

rated through 38kV, 800A continuous current,

12.5kA symmetrical interrupting

Viper ST 2011 r3_9253_FINAL 3/28/11 1:20 PM Page 1

G&W’s Viper-ST solid dielectric tripleoption recloser combines the time-proven reliability of electronically controlled, vacuum fault interrupterswith the maintenance-free benefits ofa solid dielectric insulated device. Thetriple option feature offers user flexibil-ity by permitting three distinctmechanical operating modes.• 1� trip /1� lockout• 1� trip /3� lockout• 3� trip /3� lockout

The Viper-ST provides overcurrentprotection for systems through 38kVmaximum, 800A continuous currentand 12.5kA symmetrical interrupting.

FEATURESReliable Performance - Viper-STreclosers utilize G&W’s time-provenepoxy polymer system to fully encapsulate the vacuum interrupters.This system provides excellent insulation while providing fully shield-ed, void-free construction. All mod-ules are UV protected and 100% factory tested for partial discharge. The Viper-ST recloser utilizes thelatest in magnetic actuator technology. The interrupter andactuator assembly has been tested forover 10,000 mechanical operations toassure a long operating life.

Operator Safety - Vacuum interrupters are sealed within soliddielectric insulation providing deadtank construction. A hookstick operable, manual trip and lockout handle prohibits operation either fromthe control or remotely. A mechanicalblocking device further assuresagainst accidental close through thehandle. An open and closed contactindicator verifies contact position.Contact status and lockout conditioncan also be verified at the control.

Maintenance-free – Solid dielectricinsulation provides a maintenance-free installation. Electronic equipmentassociated with the operation of themagnetic actuator(s) are located in thecontrol.

Ease of Operation -The Viper-ST is compatible with theSchweitzer SEL-651R control.

Ease of Installation - The Viper-ST islightweight and compact. Site-readydesigns provide all accessories includ-ing bracket, arresters and voltagetransformers preassembled prior toshipment significantly reducing instal-lation time. One single control cablebrings all current, breaker status andtrip/close information into the control.

Application Flexibility - Units aredesigned for overhead, substation andpadmount applications. Polemountedunits can be equipped with either horizontal or vertical insulators. Viperreclosers are designed with IEEEinterface apparatus bushings permit-ting the use of either silicone insula-tors for overhead applications orelbow connectors for padmount orriser applications. Removable sili-cone insulators are standard for over-head applications. This feature permits easy field replacement if aninsulator is damaged. Higher externalBIL rated insulators can also be usedin high pollution areas and can beretrofitted if necessary.

Smart Grid / LazerTM AutomationSolutions - The Viper-ST is automa-tion ready, simplifying conversion forany future automation requirements. A multi-ratio current transformer isencapsulated within the module. Thecurrent transformer is provided atratios of 500:1 and 1000:1. Inputs tothe control are field changeable. CTaccuracy is +/-1%. Capacitive stylevoltage sensors encapsulated withineach module permit voltage readingfor network reconfiguration while elimi-nating the need for add-on sensors

15kV Viper-ST recloser with polemount center bracket

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Silicone insulators are removablepermitting easy replacement in thefield if damaged or if higher external BIL level is required.


and cabling. Voltage sensing accu-racy is +/-3% over the temperaturerange +65°C through -20°C when tested as a system. The accuracy is +/-5% at -20°C through -60°C.External voltage and current sensorscan also be used depending on application requirements.

Complete Lazer automation pack-ages are available offering a pre-engineered solution for applicationsrequiring intelligent automatic switch-ing and power restoration. The pack-ages feature one or more protectiverelays (typically Schweitzer),equipped with distribution and com-munication capabilities. Availablecommunication devices include fiberoptic transceivers and wireless radio.

DEAD-LINE OPERATIONThe unique design of the Viper-ST magnetic actuator system provides forlocal and remote operation of the recloser in the event that the ACsource power is lost or interrupted.

OPERATION PRINCIPLEThe Viper-ST recloser monitors the circuit using internal multi-ratio currenttransformers and voltage sensors.The unit is powered by an external120 VAC or 125 VDC source. In theevent AC power is lost, the unit oper-ates through the batteries located inthe control.

Recloser sequence operations, trip-ping and overcurrent sensing is anautomatic function of the electroniccontrol. Each phase module incorpo-rates a magnetic actuator and driveassembly. Each magnetic actuatoruses a permanent magnet to hold asolenoid plunger in the closed positionwhile maintaining a charge on theopening spring. Trip/close operation issimply accomplished by energizingthe trip coil which generates a mag-netic flux in the opposite direction andreleases the trip spring. The control

may be set for three distinct operatingmodes to allow for maximum applica-tion flexibility: • 1� trip /1� lockout• 1� trip /3� lockout• 3� trip /3� lockout

MANUAL TRIP OPERATIONOperation of the hookstick operablemanual trip handle trips and locks outthe recloser. Pulling the handle downtrips and locks out the selected phase.A contact position indicator is providedindicating open or closed status of thecontacts for each phase. Module contact status is also displayed at thecontrol. Operation of the manual triphandle disables any local or remote closing operation until the handle isreset. A mechanical blocking devicefurther assures against accidentalclose through the handle. The han-dle is operable from ground level.Once reset, the recloser can beclosed using the control.

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Manual trip handle prohibits electronicclosing operation through the control.


CONTROL CAPABILITIESThe Viper-ST works directly with thepopular Schweitzer SEL-651R control. Typical features of the SEL-651R include:• Six voltage inputs necessary for loop scheme designs• Full line metering capabilities using the voltage inputs from the internal sensors• Programming to recognize seasonal loads and shift between three phase and single phase trip/close modes for optimal system efficiency• For loop schemes the control can be programmed to act as a recloser “looking” in either direction• Minimum trip for phase, ground and sensitive earth faults• Capable of up to four shots to lockout• Sequence coordination• Harmonics up to the 15th for the THD analysis • Cold load pickup

CONTROL CONNECTIONSA twist lock style connector makesthe cable connection between thecontrol and the interrupter controlbox. AC power provides the normalsupply power to the control.

SOLID DIELECTRIC MODULESThe Viper-ST modules are manufactured with an IEEE apparatus bushing interface.Removable silicone insulators arestandard for all overhead applications. If higher external BILratings are required due to localenvironmental conditions, higherrated insulators can be provided initially or retrofitted in the field byutility personnel. For dead-front,padmounted applications 600Aapparatus or 200A deep well bushings are available.

CATALOG NUMBER15.5kV . . . . . . . .VIP378ER-12-1-ST27kV . . . . . . . . .VIP388ER-12-1-ST38kV . . . . . . . . .VIP398ER-12-1-STApproximate weight (for a singlephase module less bracket) = 125lbs.(57kg)

APPLICATIONS• Sectionalizing schemes• Distributed automatic transfer• Distribution automation• Circuit breaker alternative• Relay protection• Revenue grade metering• Open bus tie

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Schweitzer SEL-651R front accesscontrol (above) for conventional recloser applications. Front/backaccess control cabinets are available.

Control cable with twist lockconnectors permit easy fieldinstallation.

Cabling from each recloser module isterminated inside a junction box permit-ting a single cable to go to the control.Cable entry can be using either strainrelief or twist lock style connectors.


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Riser application using elbow connectors for theload side. G&W Viper-S style shown.

15.5kV 27kV 38kV

A 49 (1245) 54 (1372) 58 (1473)

B 36 (925) 41 (1040) 45 (1140)

Approx. Dimensions - ins. (mm)

Polemount Center BracketDimensions are approximate. Do not use for construction. Brackets are aluminum as standard.Galvanized and stainless steel brackets are available.


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Polemount Site-Ready AssemblyPreassembly of all auxiliary equipment significantly reduces recloser preparationtime for product installation in the field.Includes potential transformers or voltagetransformers, arresters, aerial lugs,terminal/junction boxes, wildlife protectorsand all associated wiring. Control cables areconnectorized on both ends and cut tolength for a cleaner installation. User identification markers can be preapplied toeach unit prior to shipment further reducinginstallation time.

Wildlife protectors

Lightning arresters

Primarywiring

Recloser

Voltage transformer

Terminal junction box

User ID markers


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15.5kV 27kV 38kV

A 42 (1067) 50 (1270) 58 (1473)


Horizontal Insulator BracketDimensions are approximate. Do not use forconstruction. This configuration is ideal for overhead applications where all three phaseconductors are on the same side of the pole or for congested installations with minimal phase spacing. Galvanized bracket is standard. Stainless steel is available.

15.5kV 27kV 38kV

A 48 (1473) 52 (1321) 56 (1422)

B 80 (2032) 88 (2235) 92 (2337)

C 50 (1270) 55 (1397) 59 (1499)


Polemount Cluster BracketDimensions are approximate. Donot use for construction. Aluminumbracket is standard.


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Substation Mount RecloserDimensions are approximate. Do not usefor construction. Frame is adjustable.Photo and drawings below show a threephase gang mounted unit. Galvanized isstandard. Stainless steel is available.

Drawing shows 45° anglemounting for applicationsrequiring the same loadand line side connectorheight.

Brackets can be supplied for each individualmodule permitting customized substation configurations. See photo inset below.

15.5kV 27kV 38kV

A 46 (1168) 51 (1295) 55 (1397)



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PADMOUNT APPLICATIONSFor applications where space islimited at the substation orwhere underground feedersrequire protection, Viper-STsolid dielectric reclosers canprovide an ideal solution usinga dead-front padmount design.In this configuration, the cableconnections can be providedwith either a standard IEEE600A apparatus or 200A deep-well interface for elbow connec-tors. Separate compartmentsare provided for accessing thecables and operators. Controlscan be mounted directly to therecloser frame or within a separate adjacent enclosure.

Padmount Reclosers withFront / Back AccessDimensions are approximate.Do not use for construction.Drawing shows separate compartments for access tocables and operators.Galvanized steel enclosure isstandard. Stainless steel isoptional.

Module Configurations

“C” Module “Z” Module


A. GENERALThis specification covers the require-ments for an electronically controlled,solid dielectric vacuum recloser withTriple Option trip/close capabilitiesfor use on distribution systemsthrough 38kV. The recloser shall bemanufactured by G&W ElectricCompany designated as Viper-STsolid dielectric recloser. Recloserconfiguration shall be (check one):___ Polemount, center___ Polemount, side horizontal___ Polemount, cluster___ Substation, 90°___ Substation, 45°___ Padmount, dead-front

B. DESIGN RATINGS AND STANDARDSReclosers shall be designed, testedand built per IEEE C37.60 latest ver-sion, IEC 1109-Section 5.3.4, AnnexC. Certified test reports shall be pro-vided. The recloser shall be rated:(select column):

Voltage Class, kV ....................15 ........25........35Max. System Voltage,kV ....................15.5 ......27........38BIL, kV ................110 ......125 ....150Continuous Current, A ......................800 ......800 ....8008 Hr. Overload, @20°C..............960 ......960 ....960Interrupting Rating, RMS, kA ..........12.5 ....12.5 ..12.5Making Current, RMS, asym, kA ....................20 ........20 ......20Peak, asym, kA ..32 ........32........32Short Circuit Current, kA sym, 3 second ..........12.5 ....12.5 ..12.560Hz Withstand, kV rms ....Dry, 1 min. ........50 ........60........70Wet, 10 sec.......45 ........50........60Mechanical Operations ..............................10k ......10k ....10k

C. RECLOSER CONSTRUCTIONC1: Mechanism EnclosureThe magnetic actuator and corre-sponding linkage assembly shall behoused within a high impact, UV sta-ble, air insulated, poly-carbonateenclosure. A contact position indica-tor and air vent shall be provided.Lifting provisions shall be provided.

C2. Operating MechanismThe operating mechanism shall utilize a magnetic actuator for open-ing and closing of the vacuum inter-rupters. The magnetic actuator shallbe powered by capacitors located inthe control enclosure. The manualtrip and lockout handle shall bemade of stainless steel for maximumcorrosion resistance. Vacuum inter-rupter contact position indicationshall be accomplished using green(open) and red (closed) indicatorslocated on the bottom of each mech-anism enclosure and through LEDsinside the control.

C3. Vacuum InterruptersInterruption of the fault or load cur-rent shall be accomplished throughvacuum interrupters located insidethe solid dielectric modules.

C4. Solid Dielectric ModulesThe solid dielectric modules shallutilize a time-proven EPOX soliddielectric epoxy insulation to fullyencapsulate each of the three vacuum interrupters. The soliddielectric modules shall be fullyshielded and incorporate a highimpact poly-carbonate, track resistant, UV stable covering. Theoperating temperature range shallbe -60°C to +65°C. A dual ratio,500:1 and 1000:1, current transformer and voltage sensorshall be integrally molded into eachmodule. CT accuracy shall be +/-1%. Modules shall be moldedwith one (1) source side and one(1) load side, IEEE apparatus bushing interface.

C5. BushingsCable bushings shall be (check one):___ Air insulated, removable

silicone insulators over an IEEE apparatus bushing interface

For Riser Pole___ Air insulated, silicone insulators

for line side and elbow connec-tors on load side.

For Padmount design:___ 600A apparatus bushing___ 200A deep well bushing

D. OPERATIONMonitoring of the circuit shall beaccomplished using internal multi-ratio current transformers and voltage sensors. The unit shall be powered by an external 120 VAC or125 VDC source. In the event ACpower is lost, the unit shall havetrip/close operating capabilitiesthrough the batteries located in thecontrol.

Recloser sequencing, tripping andovercurrent sensing, shall be anautomatic function of the electroniccontrol. If the control is set for single phase trip/lockout, the controlwill trip only the affected phase andnot disturb the other two phases. Ifset for single phase trip, three phaselockout, only the affected phase willtrip, and if the fault is not cleared, allthree phases will lockout. If set forthree phase trip, a fault current onany phase will trip all three phases.

Manual trip and lockout shall be pro-vided by an external, hookstick oper-able handle. Operation of the manu-al trip handle shall activate amechanical block device, disablingany local or remote closing operationuntil the handle is reset.

E. SMART GRID / LAZERAUTOMATIONThe recloser shall be automationready simplifying conversion for anyfuture automation requirements.Capacitive style voltage sensorsshall be encapsulated within eachrecloser module permitting voltagereading for network reconfigurationwhile eliminating the need for add-onsensors and cabling. Voltage sens-ing accuracy shall be +/-3% over thetemperature range +65°C through -20°C when tested as a system. Theaccuracy shall be +/-5% at -20°Cthrough -60°C. Available communi-cations include fiber optic trans-ceivers and wireless radio.

TYPICAL SPECIFICATIONS

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F. MOUNTINGLifting provisions shall be provided.Mounting provisions shall be sup-plied as follows:

___ Aluminum polemount center bracket with arrester provisions on the load and source side. Galvanized and stainless steel optional.

___ Aluminum polemount cluster bracket with arrester provisions on the load and source side.

___ Galvanized polemount side bracket with arrester provisions on the load and source side. Stainless steel optional.

___ Galvanized steel substation frame. Stainless steel optional.

___ Dead-front padmounted design with galvanized steel enclosure. Stainless steel enclosure option-al. (See section G)

___ Polemount site-ready assembly

G. PADMOUNT ENCLOSUREEnclosures shall be made of 12gauge galvanized or stainless steeland manufactured to IEEE C37.72and C57.12.28 standards. Theenclosure shall be mounted independently to facilitate cableinstallation, if desired or for futurereplacement. Enclosures shall betamper-resistant incorporatinghinged access door(s) with penta- head locking bolts(s) and provisions for padlocking. The enclo-sure shall be provided with liftingprovisions and painted with aMunsell 7.0GY3.29/1.5 green finish.

H. ELECTRONIC CONTROLSThe recloser shall be controlledusing the Schweitzer model SEL-651R control.

I. FACTORY PRODUCTION TESTSEach individual recloser shall under-go a mechanical operation checkverifying contact trip/close velocity,travel profile, timing and phase syn-chronisity. The recloser shall be AChi-pot tested one minute phase-to-

phase, phase-to-ground and acrossthe open contacts. Circuit resistanceshall be checked on all phases.Timing tests shall be conducted toverify TCC performance.

J. STANDARD COMPONENTSThe following shall be included asstandard:1. Lifting provisions2. Grounding provisions3. Operations counter for eachphase located in the control

4. Manual trip and lockout handle(s)

5. SEL-651R control and associated control cable

6. Triple Option trip/close capabilities

7. Solid dielectric epoxy moduleswith internal voltage sensors and dual ratio CT’s

8. Arrester mounting provisions (overhead applications only)

9. Field changeable silicone insulators

10. Junction box with all strain relief connections

K. OPTIONSThe following options shall be supplied: (Check as necessary)___ NEMA 2-hole aerial lugs___ NEMA 4-hole aerial lugs___ Clamp style aerial lugs (#2-500

kcmil)___ Clamp style aerial lugs (250-750

kcmil)___ 4/0 brass eyebolt ground lug___ Galvanized polemount center

bracket with arrester provisionson the load and source side.

___ Stainless steel polemount center bracket with arrester provisions on the load andsource side.

___ Stainless steel polemount sidebracket with arrester provisionson the load and source side.

___ Stainless steel substation frame.

___ Polemount site-ready assembly

___ Lightning arresters ___ Dead-front padmounted

design with stainless steel enclosure.

___ External 1.0 KVA oil transformer(3% accuracy) for 120 VAC

supply power with hardware to mount on standard aluminum frame

___ External 0.75 KVA solid dielec-tric transformer (0.3% accuracy) for 120 VAC supply power with hardware to mount on standard aluminum frame

___ High impact, UV stable wildlife protectors for source and loadinsulators

___ External CTs for current monitoring

___ External voltage sensors___ Junction box with all twist lock

connections ___ Junction box with twist lock

connections for control cable and strain relief for others.

TYPICAL SPECIFICATIONS continued

NEMA 4-hole, 2-hole and clamp styleaerial lugs

Viper-ST reclosers with externalCTs and wildlife protectors

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The Flexibility of Solid Dielectric Technology

G&W ELECTRIC CO.3500 W. 127th StreetBlue Island, IL USA 60406(708) 388-5010Fax: (708) 388-0755Website: www.gwelec.comISO 14001:2004 Certified

© April, 2011 Printed in USA

SHANGHAI G&W ELECTRIC LTD.No. 8 Lane 1505, Zu Chong Zhi Road, Zhang Jiang, Pudong, Shanghai, China 201210+86-21-5895-8648, Fax: +86-21-5895-6829, Website: www.gwelec.com.cn

G&W offers a variety of epoxy encapsulatedproducts including:

Viper®-SP Single Phase Reclosers• To 38 kV, 12.5kA interrupting• Overhead, substation and padmount • Smart Grid/Lazer ready solutions • Work with SEL-351RS controls

Viper®-S Three Phase Reclosers• To 38kV, 12.5kA interrupting• Overhead, substation and padmount • Smart Grid/Lazer ready solutions • Work with SEL-351R controls

Trident® Solid Dielectric Switchgear• To 38kV, 12.5kA interrupting• Submersible vault and padmount• Smart Grid/Lazer ready solutions • Single phase and three phase

Smart Grid / LazerTM Automation• Multiple levels of protection• Open, flexible communication• Pre-engineered, factory tested• Transfer, loop and network applications

ISO 9001:2008 Certified Company


Documents

Solid Dielectric, Triple Option Reclosers€¦ · Viper ST 2011 r3_9253_FINAL 3/28/11 1:20 PM Page 8. Page 9 PADMOUNT APPLICATIONS For applications where space is limited at the substation