Microprocessor phase sequence and phase failure sensor CKF-317-TRMS

Advanced protection for motors and three-phase installations

The microprocessor-controlled phase sequence and phase failure sensor CKF-317-TRMS is a reliable device designed to protect electric motors powered by a three-phase network. It protects against the effects of voltage loss in one or more phases, phase-to-phase voltage asymmetry, and incorrect phase sequence – factors that can lead to serious damage and downtime. The device is particularly useful in demanding industrial environments, automation systems, and when powered by generators.

Functionality and precision in one device

The CKF-317-TRMS sensor stands out with its precise measurement of the true RMS voltage value, which guarantees correct operation even in power networks with significant interference. It has an adjustable voltage asymmetry threshold, allowing you to adapt the detection sensitivity to the specific operating conditions of the installation. A 4-second disconnection delay prevents accidental motor disconnection during momentary voltage drops. If an irregularity is detected, the sensor prevents the motor from starting, and reconnection only occurs after the correct power parameters are restored.

Installation and technical parameters

The device, only 18 mm wide, is mounted on a standard DIN rail, making it easy to integrate with existing electrical infrastructure. It has screw terminals for connecting wires. It provides contact separation, increasing safety. It is designed to operate in the voltage range of 190-270 V, and its contacts can withstand a load current of up to 10 A. Thanks to its compact dimensions (90 mm height and 65 mm depth), it can be used even in limited space within a switchboard. Built-in LEDs indicate the power control status.