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Overcurrent Protection: Reclosers

G&W offers a variety of solid dielectric reclosers designed to provide overcurrent protection on distribution systems rated 15.5 through 38kV, 800A continuous current and 12.5kA symmetrical interrupting. The units are comprised of epoxy encapsulated vacuum interrupters attached through a drive rod to a high speed magnetic actuator. Tradenamed “Viper” reclosers, there are four models available.

  • Compact, lightweight — The solid dielectric Viper recloser weighs considerably less than comparably rated oil insulated devices. No special lifting equipment is required.

  • Latest Solid Dielectric Technology — Solid dielectric Viper reclosers utilize G&W’s time proven EPOX polymer system to fully encapsulate the vacuum interrupters. This system provides excellent insulation properties while providing fully shielded, void-free construction. All overcurrent protection modules are UV protected and 100% factory tested for partial discharge. Dual ratio current transformers are encapsulated within each module providing either 500:1 or 1000:1 protection characteristics. CT ratios can be changed in the field.

  • Operator Safety - Vacuum fault interrupters are sealed within solid dielectric insulation providing dead tank construction. A hookstick operable, manual trip and lockout handle prohibits operation either from the control or remotely. A mechanical blocking device further assures against accidental close through the handle. The handle is operable from ground level. An open and closed contact indicator verifies contact position. Contact status and lockout condition can also be verified at the control.

  • Maintenance-free - Solid dielectric insulation provides a maintenance-free installation. Electronic equipment associated with the operation of the magnetic actuator is located in the control.

  • Application Flexibility – Recloser units are designed for overhead, substation and padmount applications. Polemounted units can be equipped with either horizontal or vertical insulators. Removable silicone insulators are standard for overhead applications. This feature permits easy field replacement if an insulator is damaged. Higher external BIL rated insulators can also be used in high pollution areas and can be retrofitted if necessary.

  • Padmount Application - For applications where space is limited at the substation or where underground feeders require protections, Viper solid dielectric reclosers can provide an ideal solution using a dead-front padmount design.


  Product Name  Model   
Viper-LT® Solid Dielectric, Triple Option Reclosers
Viper-LT® Solid Dielectric, Triple Option Reclosers

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Viper-ST and Viper-S with 6 Voltage Sensors
Viper-ST and Viper-S with 6 Voltage Sensors
6 Internal Low Energy Analog Voltage Sensor monitoring
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Viper-ST® Solid Dielectric, Triple Option Reclosers
Viper-ST® Solid Dielectric, Triple Option Reclosers
For 15.5kV: VIP378ER-12-1-ST For 27kV: VIP388ER-12-1-ST For 38kV: VIP398ER-12-1-ST
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Viper-S® Solid Dielectric, Three Phase Reclosers
Viper-S® Solid Dielectric, Three Phase Reclosers
For 15.5kV: VIP378ER-12S For 27kV: VIP388ER-12S For 38kV: VIP398ER-12S
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Viper-SP® Solid Dielectric, Single Phase Reclosers
Viper-SP® Solid Dielectric, Single Phase Reclosers
For 15.5kV: VIP178ER-12-SP For 27kV: VIP188ER-12-SP For 38kV: VIP198ER-12-SP
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Viper Recloser Control Package
Viper Recloser Control Package

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