R-K Electronics, Inc. Protection Relays & Systems TVM-400-20

The TVM-400-20 is a three-phase voltage relay designed for monitoring and protecting electrical systems. It operates within a line voltage range of 410 to 490VAC and is suitable for 50/60Hz applications. The relay features adjustable over and under voltage settings, with a tolerance of ¬±10%, 13%, or 16% of the nominal voltage. It includes a phase loss and phase rotation detection capability, ensuring that the output contacts only energize when all phases are present and within the specified voltage range. The device has a fixed pick-up and drop-out delay of 0.5 seconds, and its output rating is 10 Amps at 250VAC, making it suitable for various motor applications. The relay is housed in a plug-in package with an 8-pin octal termination and operates within an ambient temperature range of 0¬8C to 40¬8C. The TVM-400-20 is equipped with a status LED that indicates normal operating conditions when the relay is energized. This product is ideal for engineers looking for reliable protection against voltage fluctuations in three-phase systems.