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

Overview

The GE Multilin L90-W00-HQH-F8L-H6A-L6C-NXX-SXX-UXX-W7D is a high-performance line differential relay. It protects transmission lines with secure, fast fault detection. The relay supports dual-breaker and complex power system applications. It provides advanced distance protection and phase-segregated differential protection. Users benefit from integrated PMU, flexible communications, and real-time bay visualization. The L90 series ensures reliability under harsh industrial conditions.

Technical Specifications

Core Features

• Phase-segregated differential protection for single-pole tripping.
• High-speed phase and ground distance protection with five zones.
• Dynamic charging current compensation and channel asymmetry adjustment.
• Phasor Measurement Unit support per IEEE C37.118 and IEC 61850-90-5.
• CyberSentry™ cybersecurity for secure relay operation.
• IEC 61850 Ed.1 and Ed.2 certified with process bus support.
• Routable GOOSE (R-GOOSE) for wide-area protection.
• Integrated full-color display for real-time monitoring and control.

Electrical & Communication

• Input Voltage: 24V DC.
• Communication Protocol: Modbus TCP/IP.
• Three independent Ethernet ports, fiber or copper.
• Time synchronization supported via IEEE 1588.
• AC voltage withstand: continuous 260 V to neutral, 1 min/hr at 420 V.
• DCMA input impedance: 379 Ω ±10%.
• IRIG-B input amplitude modulation: 1–10 V pk-pk.
• LED test duration approximately three minutes.

Environmental & Physical

• Operating Temperature: –40°C to +70°C.
• Rugged design suitable for harsh industrial environments.
• Supports 1 to 16 data logging channels.