GE UR1HH Ruggedized Power Supply Module for Harsh Environments

Product Overview

GE UR1HH Ruggedized Power Supply Module for Harsh Environments

The GE UR1HH is a ruggedized DC 125–250V, 35W power supply card engineered for the General Electric UR Series protection relay platform — one of the most widely deployed digital protection and control architectures in critical power infrastructure worldwide. Designed to operate continuously in environments characterized by wide voltage fluctuations, electromagnetic interference, high ambient temperatures, vibration, and industrial dust ingress, the UR1HH delivers the stable, conditioned power that every UR Series chassis demands for uninterrupted protection functions.

In substations, power generation facilities, and heavy industrial switchgear rooms, the power supply card is the heartbeat of the relay system. A degraded or failed power card can cascade into loss of protection coverage across entire feeder bays, transformer banks, or motor protection circuits. The UR1HH is built to prevent exactly that scenario — providing regulated, noise-filtered DC power to the relay’s CPU card, I/O modules, communications processors, and analog input boards within the same UR chassis.

TOPNLMS maintains verified stock of the GE UR1HH, sourced through established industrial supply channels, individually inspected, and shipped with a 12-month replacement warranty. Every unit undergoes functional verification prior to dispatch, ensuring that the module you receive is ready for immediate installation or held as a critical spare in your maintenance inventory.

Rugged Specifications Table

Comprehensive Protection Solutions

The UR1HH does not operate in isolation — it is the power foundation upon which an entire UR Series relay system depends. Within a typical UR chassis, the power card supplies regulated voltage to the GE UR CPU card (the relay’s processing core), the GE UR DSP module responsible for real-time signal processing, and the various GE UR analog input cards that interface with current transformers and voltage transformers in the field. Without a reliable UR1HH, none of these downstream modules can perform their protection and metering functions.

In a complete substation protection scheme, the UR Series relay communicates with station-level SCADA systems via GE UR communications processor cards supporting protocols such as IEC 61850 GOOSE, DNP3, and Modbus. These communications modules rely on the UR1HH’s stable power rail to maintain continuous data exchange with control room HMIs and RTUs. Similarly, GE UR digital I/O modules — which interface with circuit breaker trip coils, auxiliary contacts, and alarm annunciators — require the clean, regulated supply that the UR1HH provides.

For facilities running mixed protection architectures, the UR1HH-equipped relay often sits alongside complementary equipment such as GE Multilin 750/760 feeder protection relays, GE Multilin 469 motor management relays, and GE Multilin 239 motor protection relays. In transformer protection applications, the UR Series T60 transformer protection relay — powered by the UR1HH — coordinates with GE Multilin 350 feeder protection relays on the secondary bus. Across all these configurations, the UR1HH’s role as the power supply backbone remains constant and critical.

Control cabinet integrators frequently pair UR Series relays with Phoenix Contact or Weidmüller terminal blocks for field wiring termination, Schneider Electric or ABB 24VDC auxiliary power supplies for panel instrumentation, and Moxa or Hirschmann industrial Ethernet switches for IEC 61850 substation LAN connectivity. The UR1HH’s robust design ensures it coexists reliably with all of these components in the same panel environment, even under the high-frequency switching noise generated by adjacent variable frequency drives or DC-DC converters.

Application in Critical Infrastructure

The GE UR1HH power supply module is deployed across the most demanding sectors of critical infrastructure, where relay availability is directly tied to operational safety and regulatory compliance.

Power Generation & Transmission: In coal, gas, hydro, and nuclear generating stations, UR Series relays protect generator step-up transformers, unit auxiliary transformers, and high-voltage bus sections. The UR1HH sustains relay operation through the wide DC battery voltage swings that occur during station blackstart and load-shedding events, where battery charger output can fluctuate significantly across the 125V–250V input range.

Oil & Gas Facilities: Offshore platforms and onshore processing plants operate in environments with explosive atmospheres, salt-laden air, and extreme temperature cycling. UR Series relays installed in pressurized control rooms or Ex-rated enclosures depend on the UR1HH to maintain protection of high-voltage motors driving compressors, pumps, and separators. An unplanned relay outage in these environments can trigger emergency shutdowns with significant production and safety consequences.

Mining Operations: Underground and open-cut mines subject electrical equipment to severe vibration, coal dust, and high humidity. The UR1HH’s robust construction allows it to maintain stable power delivery to protection relays guarding dragline motors, conveyor drives, and mine dewatering pump systems — all of which are classified as critical loads where protection failure is unacceptable.

Water & Wastewater Treatment: Municipal water authorities rely on continuous pump operation for water supply and sewage treatment. UR Series relays protecting high-voltage pump motors at intake stations and treatment plants require the UR1HH to sustain protection coverage 24/7, including during utility voltage disturbances that stress the DC supply system.

Metallurgy & Heavy Industry: Steel mills, aluminum smelters, and cement plants operate large synchronous motors and arc furnaces that generate intense electromagnetic interference. The UR1HH’s EMI-hardened design ensures that protection relay operation is not compromised by the harsh electrical environment characteristic of these facilities.

Security & Quality FAQ

Q1: What does the 12-month warranty cover for the GE UR1HH?
The 12-month warranty covers functional failure of the UR1HH module under normal operating conditions from the date of shipment. If the unit fails to perform its specified DC power supply function within the warranty period, TOPNLMS will provide a replacement module at no additional cost. The warranty applies to both new surplus and tested refurbished units as specified at the time of order.

Q2: How is each UR1HH tested before shipment?
Every UR1HH unit in our inventory undergoes a pre-shipment functional inspection that verifies input voltage acceptance across the DC 125–250V range, output power delivery at rated 35W load, and absence of physical damage to the card edge connector, PCB, and housing. Units that do not pass inspection are quarantined and not offered for sale. A test report summary is available upon request for critical spare applications.

Q3: Is the UR1HH compatible with all UR Series relay models?
The UR1HH is the standard DC high-voltage power supply card for the GE UR Series universal relay platform and is compatible with all UR chassis variants including the C30, C60, C70, D60, F35, F60, L90, M60, T60, and related models that specify DC 125–250V power input. Always verify your relay’s power supply slot specification against the UR1HH datasheet before installation. TOPNLMS technical support can assist with compatibility confirmation prior to purchase.

Q4: Can TOPNLMS support long-term or repeat procurement of the UR1HH?
Yes. TOPNLMS maintains ongoing stock of the GE UR1HH and related UR Series spare parts to support utilities, EPCs, and maintenance contractors with both immediate replacement needs and planned spare parts programs. We can provide quantity pricing for stocking orders and support scheduled procurement aligned with your maintenance planning cycles. Contact our team to discuss long-term supply arrangements.