Site-Specific Solutions

The Model SSS-120/240VAC-AM was designed specifically as a Primary Stage Protection device for the standard single phase, split 120/240VAC House Power. This device incorporates all-mode protection (both Line-to-Line and Line-to-Ground).

Downloadable and printable product page (PDF)

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
Equipped with 3/4" Conduit Offset Nipple for easy mounting to a Service Entrance Panel

Electrical Specifications

120 VAC (Line-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

240 VAC (Line-to-Line) Protection Levels

Maximum No Conduction AC Voltage = 275 Vrms
Maximum 1mA Conduction Voltage = 387 Vrms
Maximum single pulse energy = 990 Joules
Maximum single pulse current = 70,000 Amperes
Clamping evel = 710 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 120/240VAC grounded AC Power feeder (same as a residential power main's feeder). This unit will protect in all modes. That is, differential protection Line-to-Line and also each Line-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.