R-K Electronics, Inc. Protection Relays & Systems TVM-300-21-0002

The TVM-300-21-0002 is a three-phase voltage relay designed to protect motor circuits against overvoltage, undervoltage, phase loss, and incorrect phase rotation. It is a plug-in device with an 8-pin octal termination and a dust cover, weighing approximately 4.5 ounces. The relay operates on 100 to 600 VAC, 50/60 Hz, with the 300 series setting an input voltage range of 350 to 420 VAC and a fixed over/under voltage threshold of 13% of nominal voltage. The output contacts are rated at 10 A at 250 VAC, 1/2 HP at 250 VAC, 1/3 HP at 125 VAC, and 10 A at 30 VDC. It features a 0.5-second fixed pick-up and drop-out delay, a status LED, and operates within ambient temperatures of 0°C to 40°C, with storage from -40°C to 85°C. The model is configured for over and under voltage protection (Mode 2).