(855) 355-2724Circuit Breaker Undervoltage Releases
An undervoltage release (UVR) trips a circuit breaker when its control voltage drops or is lost, and prevents the breaker from being closed again until the voltage is restored. BRAH Electric lists 18 undervoltage releases, all direct substitutes for General Electric parts on Power Break I insulated case breakers: nine for the small frame (800A to 2000A) and nine for the large frame (2500A to 4000A). Each frame size is covered in nine control voltages, AC and DC. Listings show the family, type, voltage and the breaker frame size.
A part that replaces an OEM part number is listed under that number as well as under its BRAH part number, so the results count below can be higher than the number of parts.
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Undervoltage releases for GE Power Break I breakers
Overview
The nine voltages are 12VDC, 24VDC, 48VDC, 125VDC, 250VDC, 120VAC, 240VAC, 480VAC and 600VAC. Part numbers starting TPUV are for the small frame breakers, frame types TRLA, TRLL, TRPA, TRPP, TRL and TRP. Part numbers starting TSUV are for the large frame breakers, frame types TPS, THS, TPSS and THSS. BRAH part numbers add a BE- prefix to the General Electric number, so BE-TPUV8 replaces TPUV8 and BE-TSUV1 replaces TSUV1.
To choose, identify the frame first, since the small frame and large frame releases are separate parts. Then match the voltage of the circuit the release monitors, and whether it is AC or DC. The number on the release being replaced settles both at once.
An undervoltage release works the opposite way to a shunt trip: a shunt trip needs voltage applied to trip the breaker, and a UVR trips when voltage goes away. That makes a UVR the part to use where the breaker must open on loss of control power. Undervoltage releases carry a 2-year warranty from the date of invoice.
Need help confirming a match? Call (855) 355-2724.