GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N Feeder Protection Relay

The GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N is a multifunctional digital feeder protection IED from the GE Multilin 3 Series platform, built for medium voltage distribution feeder protection, breaker control, metering and arc flash mitigation in utility and industrial substations. This GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N integrates overcurrent protection, autoreclosing, synchrocheck and fault recording into one compact unit, serving as primary or backup protection for overhead lines, cable feeders and capacitor bank circuits. The GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N is widely supplied as a spare and retrofit protection device for substation cabinet maintenance.

The GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N supports directional phase and ground overcurrent elements with selectable time-current curves, cold load pickup blocking, second harmonic restraint and breaker failure protection logic. The GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N features built-in arc flash detection supervised by overcurrent, which helps reduce incident energy and limit equipment damage during internal faults. Its front-panel HMI and keypad enable local status viewing, setting verification and manual breaker control, while event recording and oscillography capture voltage and current waveforms for post-fault analysis with high-resolution time stamping. It supports CT/VT supervision and trip coil monitoring to check the health of breaker control circuits continuously.

This GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N is equipped with flexible communication ports including Ethernet and serial interfaces, supporting IEC 61850 GOOSE, DNP3, Modbus and IEC 60870-5-104 protocols for SCADA interconnection and inter-relay logic. The GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N supports IRIG-B and IEEE 1588 time synchronization for consistent timestamping across substation automation systems. It is available in draw-out construction, simplifying testing and replacement without removing test switches. Password protection and audit trail functions are included to meet modern substation cybersecurity requirements.

The GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N is commonly deployed in distribution substations, industrial plant switchgear and mining power feeders. Replacing a failed relay with the GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N restores selective feeder protection and bay control rapidly, minimizing outage scope for distribution networks. As a mature Multilin 3 Series protection relay, the GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N delivers reliable fault response and interoperability with other GE Vernova automation devices for distribution automation schemes. Static control should be followed when handling the GE Multilin 350-E-P5-S5-H-E-M-C-P-SN-D-N to protect internal electronics.