UR-RLH | GE Multilin | Universal Relay 35W Power Board
Manufacturer: GE Fanuc
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Part Number: URRLH
Condition：New with Original Package
Product Type: Relay Power Supply Module
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The URRLH is an authoritative Power Supply Module manufactured by GE Multilin as a fundamental component of the Universal Relay (UR) protection and control series. This module is a mechanical necessity for providing high-stability, low-noise DC power to the relay’s internal processing logic, I/O boards, and communication modules. Specifically designed for the 48V DC battery systems common in utility and industrial substations, the URRLH delivers 35W of continuous power. It serves as a protective barrier, isolating sensitive microprocessor-based protection logic from field-side voltage spikes and transients, ensuring deterministic relay operation during critical fault conditions in generator, transformer, and distribution networks.
Detailed Technical Specifications
| Attribute | Details |
| Manufacturer | GE Multilin / General Electric |
| Model Number | URRLH |
| Series | Universal Relay (UR) Series |
| Product Type | Relay Power Supply Module |
| Input Voltage | 48 VDC (Nominal range 38–60 VDC) |
| Power Output | 35 Watts (Continuous duty) |
| Primary Function | System-wide power distribution for UR chassis |
| Protection Features | Reverse polarity, over-voltage, and short-circuit protection |
| Isolation | 2 kV galvanic isolation between input and logic |
| Diagnostics | Onboard "Power Healthy" status LED and self-test monitoring |
| Efficiency | High-efficiency switching topology for low thermal dissipation |
| Operating Temp | -40 °C to +70 °C (-40 °F to 158 °F) |
| Dimensions | Standard UR Rack Module (220 × 125 × 50 mm) |
| Weight | 1.5 kg |
Engineering and Operational Guidelines
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Power Coordination Expertise: The URRLH is optimized for low-latency power startup. This expertise ensures that the protection relay initializes and reaches a "Ready" state within milliseconds of power application, minimizing the window of unprotected operation during system restarts.
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Transient Voltage Immunity: A trustworthy feature of the URRLH board is its high-frequency noise filtration. In heavy industrial refineries and high-voltage substations, DC bus noise is common; this module de-noises the input to provide clean power for the relay’s high-speed CPU.
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Authoritative Protection Logic: Integrated hardware-level diagnostics monitor the health of the output rails. If the power supply detects an internal rail failure, it immediately triggers the "Relay Fail" output, ensuring that the protection system fails safely and notifies the SCADA system via IEC 61850 or Modbus.
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Modular Integration: Designed for the standard GE Multilin UR chassis, the URRLH slides securely into the dedicated power slot. Its robust mechanical locking mechanism ensures stable electrical contact even in environments prone to high mechanical vibration.
Technical FAQ
Q: Can the URRLH be used in a 125V DC system?
A: No. The URRLH is specifically rated for 48V DC (typically 38–60V range). For 110/125/250V AC/DC systems, an alternative power module (such as the UR-RH or UR-HI) must be utilized to prevent hardware damage.
Q: Is the power supply module hot-swappable?
A: While the UR series is modular, the URRLH supplies the primary power to the entire backplane. Removing it while the system is energized will result in immediate relay shutdown. Professional best practice dictates de-energizing the chassis before module replacement.
Q: What is the significance of the 35W rating?
A: The 35W output is calculated to support a fully loaded UR chassis, including the CPU module and multiple I/O cards. This authoritative headroom ensures stable operation even when multiple output relays are energized simultaneously.