General Information

Core Description

The UR1HH is a premium GE Multilin modular protection and control relay platform built on a unified hardware architecture. Featuring fast phase distance and segregated line current differential protection, this unit integrates advanced automation logic and robust CyberSentry™ security. It works seamlessly across critical modern power grids to deliver customizable substation automation, high-accuracy metering, and uninterrupted network availability via zero-delay PRP redundancy.

Specific Application

• Transmission Line & Substation Protection: Provides high-end phase-segregated line current differential and sub-cycle distance protection for multi-terminal transmission systems.
• Generator & Transformer Automation: Implements comprehensive primary and backup protection for medium-to-large generation assets, featuring 100% stator and field ground fault detection.
• Wide Area Protection & Control (WAPC): Deploys synchrophasors streamed via Routable GOOSE (R-GOOSE) to enable predictive maintenance and real-time automated load shedding across wide area grids.

Ordering Information

System Compatibility

Software Integration: Fully programmed and managed via EnerVista Launchpad, Viewpoint Monitoring, and Viewpoint UR Engineer.

Network Protocols: Native compliance with IEC 61850 Edition 1 & 2 (including 9-2 process bus and 90-5 synchrophasor streaming), DNP 3.0, Modbus TCP/IP, and IEC 60870-5-104.

Hardware Interoperability: Compatible with standard 1 A and 5 A CTs, VTs, standard DS0 multiplexer channel banks, and HardFiber Process Bus Systems.

Alternative Models & Functional Differences

G60 / G30: Tailored specifically for Generator and Combined Generator-Transformer setups, focusing heavily on stator ground and turbine diagnostics. The core UR1HH platform provides broader modular flexibility across line, bus, and feeder assets.

D90Plus / D60: Optimized as standalone, dedicated Transmission Distance Protection relays utilizing sub-cycle fault detection algorithms. The universal UR platform synthesizes both differential and distance functions into a single box.

L90 / L60: Engineered strictly for high-end phase-segregated line current or phase comparison protection. The baseline modular platform can be retrofitted or scale up/down beyond line protection to accommodate general industrial networks.

Installation & Troubleshooting FAQ

Q1: How do I eliminate dedicated IRIG-B time synchronization wiring during substation installation?

A: You can utilize the built-in Precision Time Protocol (IEEE 1588 v2) support. By connecting the device to an IEEE 1588 compatible substation LAN, the relay synchronizes its clock to within 1 microsecond accuracy over the existing network architecture, rendering separate copper IRIG-B cabling unnecessary.

Q2: What should I check if GOOSE messages fail to transmit beyond the local substation perimeter?

A: Verify that Routable GOOSE (R-GOOSE) is properly enabled in your SCL settings configuration file and that network routers support network layer routing. Standard GOOSE is bound to the local data link layer (Layer 2), whereas R-GOOSE must be explicitly configured to map onto network protocols to cross wide area networks (WAN).

Q3: Why is the relay reporting an asymmetrical channel delay alarm over long-distance pilot communication lines?

A: Asymmetrical routing of communication paths between local and remote relays can skew differential time calculations. To troubleshoot, enable GPS satellite clock time synchronization on both ends. This allows the platform's asymmetrical channel delay compensation logic to correct for dynamic discrepancies up to 10 ms.

Q4: The front HMI shows a continuous hardware self-test failure at startup. What steps must be taken?

A: The device executes continuous runtime diagnostics along with a comprehensive startup health check covering DC voltage supplies, memory channels, and the integrity of CT/VT input circuitry. Access the internal Event Recorder or a SCADA Syslog server to retrieve the exact error code. If the internal DC power supply rails fall outside specified bounds, the modular power supply card must be un-plugged and serviced.