Product Overview

The GE UR 7HH is a high-speed communications interface module designed for the Multilin™ Universal Relay (UR) platform. This module provides critical inter-relay and system-level connectivity, enabling seamless data exchange within electrical substation environments. Featuring dual 820 nm multi-mode fiber optic channels, the UR7HH is engineered for low-latency, point-to-point, or networked communication between protection relays. By leveraging fiber optic media, the module ensures total immunity to electromagnetic interference (EMI) and ground potential rise, which are common in high-voltage utility and industrial power settings.

Technical Characteristics

The UR 7HH module is defined by its versatile protocol support and robust fiber optic architecture:

Multi-Mode Optical Interface The module utilizes two dedicated 820 nm multi-mode LED channels. This configuration offers a cost-effective solution for short-to-medium distance inter-relay links, providing high-bandwidth data transmission with significantly lower susceptibility to signal noise compared to traditional copper-based serial links.

Advanced Protocol Integration Designed for modern "Smart Grid" infrastructure, the UR 7HH supports an extensive suite of industrial protocols. These include IEC 61850 for substation automation, DNP 3.0, Modbus TCP/IP, and IEC 60870-5-104. This broad compatibility ensures the module can communicate with a wide variety of SCADA systems and Master Station controllers.

Synchrophasor and Ethernet Support The module is equipped to handle IEEE C37.118 synchrophasors over Ethernet, allowing for real-time monitoring of phase angles across the grid. With three integrated Ethernet ports, the UR 7HH provides redundant path capabilities to mitigate network latency and ensure continuous data availability for time-critical protection functions.

Comprehensive Diagnostic Monitoring Integration with GE’s EnerVista™ software suite allows for real-time health monitoring of the communication channels. Operators can track signal attenuation, trend communication statistics, and perform remote diagnostics, ensuring the hardware maintains optimal performance levels throughout its operational lifecycle.

Technical Specifications

• Brand: General Electric (GE)

• Model Number: UR 7HH / UR-7HH

• Series: Multilin Universal Relay (UR)

• Module Type: Communications Control Module

• Optical Interface: Dual 820 nm Multi-mode Fiber

• Ethernet Ports: 3 Ports (Redundant Support)

• Protocols: IEC 61850, DNP 3.0, Modbus TCP/IP, IEC 60870-5-104

• Standard Compliance: IEEE C37.118 (Synchrophasors)

• Weight: 0.84 kg

• Dimensions: 6.0 x 19.5 x 17.2 cm

• Origin: USA

Application Areas

The UR 7HH is a fundamental component for substation and industrial power control:

• Substation Automation: Facilitating peer-to-peer GOOSE messaging for high-speed interlocking.

• Transmission & Distribution: Enabling synchronized phasor measurements for grid stability.

• Industrial Power Systems: Linking Multilin relays to centralized SCADA networks in refineries and mines.

• Redundant Communications: Providing fail-safe Ethernet paths for critical protection and control data.