R-K Electronics, Inc. Protection Relays & Systems TVM-400-12

The TVM-400-12 is a three-phase voltage relay designed to protect motors by monitoring line voltage, phase rotation, and phase loss. It is packaged as a plug-in module with an 8-pin octal termination and fits a dust cover. The relay operates on 410 to 490VAC, three-phase, at 50/60Hz, and features a fixed 0.5-second pick-up and drop-out delay. Output contacts are rated at 10A at 250VAC, 1/2 HP at 250VAC, 1/3 HP at 125VAC, and 10A at 30VDC. It includes a status LED and operates within ambient temperatures of 0°C to 40°C, with storage from -40°C to 85°C. The unit has an over/under voltage dropout range of 13% of nominal voltage, and phase rotation is preset to A-B-C. Weight is approximately 4.5 oz.