GE 350-E-P5-G5-H-E-S-N-N-1E-D-N
GE 350-E-P5-G5-H-E-S-N-N-1E-D-N - Image 2

GE 350-E-P5-G5-H-E-S-N-N-1E-D-N

Product Introduction
The 350-E-P5-G5-H-E-S-N-N-1E-D-N is an advanced microprocessor-based feeder protection relay system manufactured by GE Multilin. It is specifically engineered to provide primary and backup overcurrent protection, control, and monitoring for medium and low-voltage power distribution feeders in utility substations and industrial power systems.

Request Quote
Category:

Description

GE 350-E-P5-G5-H-E-S-N-N-1E-D-N

Technical Specifications

  • Phase Current Rating: 5A three-phase current inputs (P5).
  • Ground Current Rating: 5A ground current input (G5).
  • Power Supply: 125-250 VDC / 120-240 VAC (H).
  • Faceplate: Standard LCD with full menu, 8 Inputs, and 7 Outputs (2 Form-A, 5 Form-C) (S).
  • Protection Type: Standard Overcurrent Protection (50P, 50G, 50N, 51P, 51G, 51N) (N).
  • Control: No Selection (N).
  • Communications: Front USB, Rear RS485 supporting Modbus RTU, DNP3.0, and IEC 60870-5-103 (1E).
  • Case Design: Draw-out chassis for fast installation and replacement (D).
  • Harsh Environment: No special coating (N).

Functional Features

  • Comprehensive Protection: Includes standard overcurrent, ground fault, negative sequence, and directional elements.
  • Advanced Signal Processing: Processes up to four current waveforms per cycle, utilizing phasors to eliminate harmonics and fault current transients for highly reliable protection without overreach.
  • Programmable Setpoints: Features extensive programmable setpoints grouped into flexible categories for inputs, outputs, system settings, and protection curves.
  • Phase Sequence Programming: User-programmable phase sequence (ACB or ABC rotation) for flexible installation.

Application Scenarios
Deployed in utility substations, petrochemical plants, and heavy industrial manufacturing facilities to manage and protect high-voltage distribution feeders.

Performance Parameters

  • Dielectric Voltage Test Level: 2.3 kV.
  • Conducted RF Immunity Test Level: Level 3.
  • Operating Temperature: -40°C to +60°C.
  • Humidity Tolerance: 5% to 95%, non-condensing.

Material Composition
Housed in a rugged industrial enclosure with a conformal coating option for harsh environments. Internal components feature dual 32-bit microprocessors for redundant, high-speed processing.

Structural Characteristics
Features a compact, draw-out chassis design that significantly reduces installation time and eliminates the need for rewiring during maintenance. Includes a 40-character LCD display with a navigation keypad and front USB port.

Working Principle
The relay continuously samples phase and ground currents via instrument transformers. The dual microprocessors calculate phasors to filter out transients and harmonics, comparing the processed values against programmable ANSI protection curves. If a fault is detected, it instantly triggers the output relays to trip the circuit breaker.

Installation Requirements
Must be installed according to Chapter 2 of the GE Multilin 350 Protection Instruction Guide. Correct transformer polarity and phase sequence are critical; when wired correctly, the relay accurately indicates positive power flow direction.

Usage Precautions
Phase and ground current ratings must strictly match (e.g., P5 requires G5). Mixing 5A and 1A inputs causes severe operational issues. Always use the EnerVista 350 setup software for configuration and verify all wiring against the typical connection diagrams before energizing.

Related products