GE UR7KH (UR-7KH) | Multilin UR Series Dual-Channel Single-Mode Fiber Communication Module

UR7KH Module

I. Product Positioning

GE Multilin (now GE Vernova) UR General Protection Device-specific 7-type optical communication sub-card, plug-in type rear-ｉｎｓｅｒｔ module, used for long-distance optical fiber longitudinal communication in line differential and transformer protection devices, compatible with the entire series of UR protection relays (T60 transformer protection, F60 feeder, B30 bus differential, L90 line differential, etc.).

Key Optical Parameters

Optical path specification: Dual independent channels, 1300nm laser, single-mode optical fiber SM

Interface: ST optical fiber connector (standard), each channel independent Tx emission + Rx reception (CH1 on top, CH2 below vertically arranged)

Transmission distance: Single-mode optical fiber can reach up to 30km+, strong anti-electromagnetic interference (preferred for substations with strong electromagnetic field environment)

Power consumption: Overall ≤ 3W, module net weight ≈ 0.72kg; Form: 263×58×28mm, standard slot size of UR chassis

Core Functions

Longitudinal Differential Protection Communication: L90 line differential, T60 ratio differential, B30 bus differential POTT / permissive protection optical interconnection, real-time relay protection tripping data interaction

Device-to-device point-to-point optical networking, replacing copper wire serial ports, eliminating interference and malfunctions;

Companion software: EnerVista UR configuration, channel fault diagnosis, optical power monitoring, online firmware upgrade, fault recording export;

Dual-channel redundancy: Dual optical paths serve as backups, single-channel optical fiber break does not interrupt protection logic.

 Distinction of 7-digit Series Optical Cards (Selection Comparison) Table

Model Optical Fiber Type Wavelength Interface Usage

UR7KH Single-mode SM 1300nm Laser ST Long-distance 30km+; Main line protection for longitudinal connection

UR7DH Multi-mode MM 1300nm ST Station internal short-distance ≤ 2km; Cabinet interconnection

UR7HH Single-mode 1550nm 1550nm ST Extra-long distance 50km+ for long-distance transmission lines

Compatible Host Models

T60 (primary), L90, B30, F60, C60, M60 - the entire series of UR microcomputer protection devices, and the accessories for the high-voltage / main transformer protection screens of substations.

Application Scenarios

Thermal power / hydropower power station booster stations, substations 110kV - 500kV transformers, relay protection systems for transmission lines.