PGR-3100 Series - Ground-Fault Indication System

The PGR-3100 indicates the presence of voltage on each phase of a three-phase system. The LEDs on the panel illuminate when voltage is present. When a ground-fault occurs, the voltage on the faulted phase reduces to ground potential, causing the LEDs for the faulted phase to dim. On a resistance grounded or ungrounded system the LEDs for the unfaulted phases become brighter. Ungrounded ac systems are required by the National Electrical Code (NEC®) Article 250.21(B) and the Canadian Electrical Code Part 1, Section 10-106 (2) to have ground detectors, such as the PGR-3100, installed on the system. External potential transformers (PTs) can be used to step down system voltage, allowing the PGR-3100 to be applied to any system voltage. PTs are not required for system voltages up to 600 Vac.



NEC® and CEC Code compliant

Meets National Electrical Code (NEC®) Article 250.21(B) and Canadian Electrical Code Part 1, Section 10-106 (2) requirements for ungrounded systems

Phase LEDs

Indicates presence of a ground fault and the faulted phase as well as phase-to-ground voltage on an energized bus

Redundant LEDs

Redundant long-life LEDs (two per phase) to ensure reliability

Lamp test button

Verifies LEDs are operating

Access specifications, certifications, check availability and order parts below

Catalog #Supply
PGR-3100600 VacN/AN/ACSA; UL