The General Electric UR RHV, also cataloged as the RHV Power Supply module, operates as a dedicated hardware component for converting line-level input voltage into stable DC power rails required by Multilin Universal Relay (UR) platform circuitry. This module provides the necessary voltage regulation and isolation to support the internal backplane bus, CPU modules, and associated I/O hardware within the relay chassis.

Hardware Specifications

Backplane Bus Communication and Power Regulation

The UR RHV module integrates with the relay backplane to deliver clean, regulated DC voltage to all system components. The module incorporates internal voltage monitoring circuitry that continuously assesses the health of the output rails, ensuring that any deviation from the nominal operating voltage is reported to the central processor. Reliable power delivery is necessary to maintain the timing accuracy of protection algorithms and the deterministic nature of data transmission across the backplane bus.

Frequently Asked Questions

Q: Can the UR RHV module handle wide-ranging input voltages?

A: The UR RHV is designed for specific input ranges typical of industrial control environments. Refer to the module’s nameplate and the UR system technical manual to confirm the supported nominal input voltage and tolerance before installation.

Q: Is this power supply unit capable of being hot-swapped?

A: No. The UR RHV module is not intended for hot-swapping. The host relay chassis must be de-energized to prevent arcing at the backplane connection points and to avoid unexpected system resets or logic errors during module replacement.

Field Installation Guidelines

1. Ensure the Multilin UR relay chassis is de-energized and all AC/DC power sources are physically disconnected.
2. Align the UR RHV module with the dedicated power supply slot in the chassis, ensuring the connector pins are correctly oriented.
3. Seat the module firmly into the chassis, ensuring the locking latches are fully engaged to provide a secure mechanical and electrical connection.
4. Verify that the primary input power wiring to the chassis is secure and within the specified voltage range.
5. Restore power to the unit and check the front panel LED indicators to confirm that the power supply is outputting the correct voltage levels.
6. Use the relay diagnostic menu to verify that the internal power health status is reported as normal before proceeding with system operation.