Configured for comprehensive protection, control, and real-time monitoring of distribution feeders across low, medium, and high voltage power systems, the GE Multilin 350-E-P1-G5-H-S-N-1E-H (350-E-P1-G5-H-S-N-1E-H Feeder Protection System) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

• 350-E-P1-G5-H-S-N-1E-H: Advanced microprocessor-based feeder protection relay variant equipped with three-phase 5 A current inputs, a 5 A ground input, high-range auxiliary power supply capabilities, silver-alloy Form-C relay contacts, and standard communication interfaces.

Hardware Specifications

Profinet and Deterministic Network Processing

The internal digital signal processor executes high-speed sampling of feeder currents and voltages to evaluate overcurrent, cold load pickup, and multi-shot recloser elements within sub-cycle intervals. Communication interfaces support deterministic network protocol integration via Modbus RTU and DNP3.0, enabling remote supervisory control, event record downloading, and oscillography buffer extraction without interrupting primary protection functions. Hardware isolation barriers protect internal microelectronics from high-voltage transients and electromagnetic interference originating from electrical switchgear environments.

Frequently Asked Questions

Q: Does this protective relay support live draw-out extraction while the auxiliary control power and current transformer inputs are energized?

A: Hot-plugging or unlatching the unit while energized is restricted; auxiliary power supplies and external current transformer shorting blocks must be fully secured before servicing.

Q: How are historical oscillography records extracted from the device locally?

A: Waveform data buffers can be downloaded directly through the front-panel USB port at a communication rate of 115 kbps using compatible configuration software.

Q: What mechanisms ensure secure access control for relay settings?

A: The system implements hierarchical password control protocols to prevent unauthorized configuration changes and ensure centralized management security.

Field Installation Guidelines

• Verify that all current transformer (CT) secondary circuits are short-circuited externally at test switches before servicing or wiring the relay.
• Ensure that control power wiring and protective earth ground connections conform to substation standards to maintain noise immunity and personnel safety.
• Route communication cables and serial loops through dedicated shielded conduits separated from high-voltage power leads and motor starter feeds.