With fixed actuation threshold voltage asymmetry.
Three phase monitors serve to protect the three-phase electric motors supplied from three-phase mains, against phase collapse in at least one phase or against phase-to-phase voltage asymmetry, threatening to damage the motor.

Monitor with action delay 0,5 sec.
Three phase monitors serve to protect the  three-phase electric motors supplied from three-phase mains, against phase collapse in at least one phase or against phase-to-phase voltage asymmetry, threatening to damage the motor.

Multi-point temperature transducer with Modbus RTU communication.
Up to 10 external DS18B20 digital temperature sensors.
Sensor bus: 1-Wire.
Measuring range: −55 to 125°C.
System interface: RS-485.
Temperature sensors must be selected separately.

Multi-point temperature transducer with Modbus RTU communication.
Up to 30 external DS18B20 digital temperature sensors.
Sensor bus: 1-Wire.
Measuring range: −55 to 125°C.
System interface: RS-485.
Temperature sensors must be selected separately.

How to protect against phase loss, changes in the direction of rotation of an electric motor, and voltage anomalies?

Principle of operation ofthe CKF-318 phase sequence and loss sensor without a neutral wire.

How to control voltage in a single-phase network? 
Protecting single-phase receivers against the effects of voltage increases or decreases.

Use of theCP-710 voltage relay

Power supply for single-phase receivers from a three-phase network.
Maintaining the continuity of power supply to a single-phase receiver when the phase from which it is powered disappears or its parameters fall below the standard.

Principle of operation of thePF-431 automatic phase switch