SZR-278

The most important features of the SZR-278 are:
* simultaneous control of two power lines through the measurement of phase voltages on each phase in all power lines.
The control includes:
– control of the presence of phases and correctness of the voltage supply;
– control of the asymmetry of the phase voltages;
– control of the phase sequence.
* control of both contactors and motor-driven switches.
* control of the operation of the switchgear devices;
* monitoring of overcurrent protection activation;
* configurable parameters of controller operation:
– minimum acceptable supply voltage;
– times of the reaction of the controller to incorrect parameters of the power line and return to the correct parameters;
– delay between switching off one line and switching on the next one;
– phase sequence control;
– the power supply of the controller can be provided both via external N1 and N2 power lines, as well as dedicated 50÷350 V AC/DC input of guaranteed power supply;
– can be used in single-phase circuits.