GE SR735-CASE Power Relays, Feeder Protection, Overcurrent, Voltage, Frequency Protection

The GE Multilin SR735-CASE is a microprocessor-based feeder protection relay designed for primary circuit protection on distribution networks. It is housed in a standard draw-out case (SR735-CASE), facilitating quick replacement and testing without disturbing rear terminal wiring. This relay provides comprehensive protection functions including three-phase overcurrent (50/51), ground overcurrent (50N/51N), negative sequence overcurrent (46), over/under voltage (27/59), and frequency protection (81O/U). Measurement capabilities include current, voltage, power, and frequency. It features configurable digital inputs and outputs, and communication typically via Modbus RTU or DNP 3.0 protocols. The auxiliary supply voltage range commonly supports both AC and DC applications.