GE Multilin 350-E-P5-G5-H-E-M-N-P-SN-P-N Feeder Protection Relay

Overview

The GE Multilin 350-E-P5-G5-H-E-M-N-P-SN-P-N is a microprocessor-based feeder protection relay. It offers advanced protection, control, and monitoring for medium and low-voltage feeders. Designed for both primary and backup roles, it suits utility substations and industrial power systems. Its compact, draw-out chassis ensures fast installation and simplified maintenance. The relay supports multiple communication protocols, making it easy to integrate into SCADA or automation systems.

Technical Specifications

Protection Functions

• Overcurrent: ANSI 50/51
• Ground Fault: Detects ground faults quickly
• Negative Sequence: Monitors unbalanced currents
• Directional Elements: Phase and ground directionality
• Arc Flash Detection: Reduces incident energy levels

Measurement Inputs

• Current Inputs: 1 A phase CTs (P5)
• Voltage Inputs: 3-phase voltage sensing

I/O Capabilities

• Digital Inputs: 10 opto-isolated
• Digital Outputs: 7 outputs (2 Form-A, 5 Form-C)

Power Supply

• Range: 90–300 VDC or 70–265 VAC

Display & Interface

• Display: 40-character LCD with navigation keypad
• Front Port: USB for local configuration
• Rear Port: RS485 for remote access

Communication Protocols

• Supported: Modbus RTU, DNP3.0

Environmental Ratings

• Coating: Conformal coating for harsh conditions
• Operating Temperature: −40°C to +60°C
• Humidity: 5% to 95%, non-condensing

Mechanical Design

• Mounting: Draw-out chassis for fast replacement
• Software Support: Compatible with EnerVista 350