R-K Electronics, Inc. Protection Relays & Systems TVM-400-10-0002

The TVM-400 is a three-phase voltage relay designed to protect motors by monitoring line voltage, phase rotation, and phase loss. It mounts as a plug-in device with an 8-pin octal termination and includes a status LED. The device operates on 410 to 490VAC, three-phase, at 50/60Hz, with a fixed 0.5-second pick-up and drop-out delay. Output contacts are rated at 10 amps at 250VAC, 1/2 HP at 250VAC, 1/3 HP at 125VAC, and 10 amps at 30VDC. Operating temperature ranges from 0°C to 40°C, with storage from -40°C to 85°C. It consumes 1.5VA and includes a dust cover. Weight is approximately 4.5 ounces.