The Model SSS-120/208VAC-PG was designed specifically as a Primary Stage protection device for a grounded Three Phase WYE 120/208VAC feeder.

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Highlights:

  • High-Energy MOV Protection
  • Lightweight, high-strength Polycarbonate enclosure
  • Clear cover for easy inspection
  • 100% field repairable
  • All components are UL Listed
  • Operating Temperature Range: -40 to +70°C

Features:

  • High-Energy MOV Primary Stage Protection for both Line-to-Line and Line-to-Ground
  • All-Mode protection including both Phase-to-Phase and Phase-to-Ground
  • Equipped with 3/4" Conduit Offset Nipple for easy mounting to a Service Entrance Panel

Electrical Specifications

208 VAC (Phase-to-Phase) Protection Levels

  • Maximum No Conduction AC Voltage = 280 Vrms
  • Maximum 1mA Conduction Voltage = 396 Vrms
  • Maximum single pulse energy = 1,200 Joules
  • Maximum single pulse current = 70,000 Amperes
  • Clamping evel = 720 Volt peak @ 500 Amperes

120 VAC (Phase-to-Ground) Protection Levels

  • Maximum No Conduction AC Voltage = 140 Vrms
  • Maximum 1mA Conduction Voltage = 198 Vrms
  • Maximum single pulse energy = 600 Joules
  • Maximum single pulse current = 70,000 Amperes
  • Clamping evel = 360 Volt peak @ 500 Amperes

Mechanical & Temperature Specifications:

  • Length = 5 in.
  • Width = 5 in.
  • Depth = 4 in.
  • Weight = 1 lb.
  • Equipped with 3/4" Conduit Offset Nipple for easy mounting to a Service Entrance Panel
  • Operating Temperature Range: -40 to +70°C

Dimensions:

Functional Wiring Diagram:

Summary:

This unit is designed to protect a standard 120/208VAC 3-phase WYE configurations (center grounded), AC power feeder. This unit will protect in all modes. That is, differential protection Phase-to-Phase and also each Phase-to-Ground. This is a primary stage protector and would be connected at the Breaker / Distribution Panel before the power is distributed throughout the Signal House or Case.



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