BUY EVM31-050 https://www.utsource.net/itm/p/1550707.html
BIPOLAR TRANSISTOR MODULES Rating and Specifications
EVM31-050 is a module manufactured by Fuji Electric. It is a three-phase voltage monitoring relay with a built-in timer. It is designed to monitor the voltage of three-phase AC power supply systems. It can be used to detect abnormal voltage conditions such as overvoltage, undervoltage, and phase loss. It can also be used to detect phase unbalance and phase reversal. The built-in timer can be used to set the time for the relay to operate. The EVM31-050 module is suitable for use in various industrial applications, such as motor control, power distribution, and process control. (For reference only)