Description

The GE UR6UH represents the pinnacle of grid protection technology within GE’s Multilin Universal Relay series, engineered for ultra-high-speed fault clearance and cyber-resilient operation in mission-critical transmission and generation assets. Designed to meet stringent utility requirements, the GE UR6UH delivers sub-cycle tripping (<16 ms) through its multi-core processing architecture, combining synchronized phasor measurement (PMU) and traveling-wave fault location with traditional protection functions. This relay excels in EHV applications up to 765 kV, featuring adaptive auto-reclosing logic and RFC 6272-compliant cybersecurity for smart grid interoperability.

Leveraging GE’s Hyperstream™ sampling technology (256 samples/cycle), the GE UR6UH captures transient phenomena with unmatched resolution while maintaining IEEE C37.118 Class P PMU accuracy during frequency ramps. Its modular design supports hot-swappable fiber-optic IED modules and hardware security tokens, enabling zero-downtime security upgrades. As the cybersecurity flagship of the UR platform, the GE UR6UH incorporates quantum-resistant encryption and runtime firmware integrity checks to defend against evolving grid threats.

Technical Specifications

Main Features and Advantages

Grid-Sensing Intelligence: Hyperstream™ ADC technology enables 0.1° phase angle resolution for precise impedance measurement during swing conditions. Integrated traveling-wave detection locates faults within ±150 meters on 500 km lines, accelerating restoration.

Cyber-Physical Defense: Dedicated security co-processor performs runtime anomaly detection, while hardware-enforced role separation isolates protection and monitoring functions. Supports air-gapped key injection via USB HSM tokens.

Resilient Communications: Quad-redundant fiber ports with PRP/HSR protocols ensure<5ms failover. GOOSE messaging with IEC 62351-6 encryption prevents spoofing in multi-vendor substations.

Adaptive Protection: Machine learning algorithms predict voltage instability and dynamically adjust zone reach during load swings. Inertia monitoring triggers underfrequency load shedding with grid-wide coordination.

Application Field

The GE UR6UH secures backbone transmission infrastructure, including 400kV+ interconnects and cross-border tie-lines, where sub-cycle clearing prevents cascading outages. In HVDC converter stations, it protects transformers against DC bias saturation and valve-side harmonics. Nuclear plants utilize its<2ms bus differential protection for Class 1E safety systems.

For renewable integration, the relay enables low-inertia grid stability through PMU-based synthetic inertia calculation and renewable curtailment logic. Metro power networks deploy the GE UR6UH in tunneled cable sections for arc-flash detection using distributed fiber temperature sensing. In offshore wind farms, its pressurized enclosure withstands 100% humidity and salt corrosion while synchronizing collection platforms via PTPv2.

Related Products

GE UR6DH: Cybersecurity-focused relay for sub-345kV applications

GE UR8UH: Modular chassis platform with 32-bit processing

GE D90: Line differential system with IEC 61850-9-3 PTP

GE L90: Ultra-high-speed distance relay

GE F35: Feeder protection with auto-sectioning

GE C70: Distance relay with power swing blocking

GE T60: Transformer protection system

GE SPS: System Protection Server for wide-area control

Installation and Maintenance

Pre-installation preparation: Conduct insulation resistance tests (>100 MΩ @ 5kV) on CT circuits before connection. Validate GPS/PTP time source stratum level (Stratum 1 recommended). Pressurize enclosure to 1.2 bar for 24 hours to verify IP55 seal integrity. Pre-load digital certificates via GE’s Key Management Server.

Maintenance recommendations: Perform quarterly travelling-wave system calibration using pulsed laser test sets. Annually validate PMU accuracy with dynamic frequency ramps (45–65 Hz). Replace HSM tokens every 24 months and conduct dielectric tests on fiber connectors biannually. Monitor security event logs for anomalous access patterns.