R-K Electronics, Inc. Protection Relays & Systems TVM-400-21-2000

The TVM-400-21-2000 is a three-phase voltage relay designed to protect motors by monitoring line voltage, phase rotation, and phase loss. It features a plug-in, 8-pin (octal) package with a dust cover and weighs approximately 4.5 oz. The relay operates on line voltages from 410 to 490 VAC, 3Ø, and has a fixed drop-out delay of 0.5 seconds. Its output contacts are rated for 10 A at 250 VAC, 1/2 HP at 250 VAC, 1/3 HP at 125 VAC, and 10 A at 30 VDC. It provides over and under voltage protection with a 13% adjustable window, and indicates normal operation via a status LED. Operating ambient temperature ranges from 0°C to 40°C, with storage from -40°C to 85°C.