Ground Fault Sensors Include Precision Voltage Reference

The CR7310 series ground fault sensors detect ground fault currents in single and multiple phase systems from 100A ac to as low as 10 mA at supply voltages of 120 or 240 Vac. The devices include a precision voltage reference circuit to ensure a highly repeatable trip point. Current carrying wires are routed through the opening of the sensor and when ground current reaches the level set by the trip-point adjustment, a relay is energized, illuminating an LED and providing an output signal. The sensors are available in a variety of relay or solid-state output options, as well as a calibrated dial option that allows adjustment of the LED trip status indicator for viewing of the current trip point.