GE Multilin L90-W00-HQH-F8L-H6A-L6C-NXX-SXX-UXX-W7D Line Current Differential Relay

Overview

The GE L90-W00-HQH-F8L-H6A-L6C-NXX-SXX-UXX-W7D is a versatile Multilin L90 Line Current Differential Relay. It protects high-voltage transmission lines with fast, accurate current differential protection. This relay handles dual-breaker, series-compensated, and three-terminal line configurations. Additionally, it uses synchronized sampling and adaptive algorithms for secure fault detection.

Technical Specifications

Model: L90-W00-HQH-F8L-H6A-L6C-NXX-SXX-UXX-W7D

Protection Functions:

• Phase-segregated current differential protection

• 5-zone distance protection with independent compensation

• Dynamic charging current compensation

Communication:

• Three independent Ethernet ports (fiber or copper)

• IEEE 1588 time synchronization

• IEC 61850 Ed. 1 & 2 support, including GOOSE and R-GOOSE

Cybersecurity:

• Integrated CyberSentry™ features

• Compliance with modern cybersecurity standards

Display and Metering:

• Full-color HMI with bay mimic and phasor visualization

• Detailed metering of voltage, current, power (active, reactive, apparent), energy, frequency, power factor

Event and Fault Recording:

• High-resolution event and fault records

• COMTRADE compliant (IEEE C37.111-1999/2013, IEC 60255-24 Ed 2.0)

Clock Synchronization:

• Precise distributed time synchronization

• Supports IRIG-B time signals

Environmental and Mounting:

• Operating temperature: -40°C to +85°C

• Designed for horizontal 19-inch rack mounting