Protection device Multifunctional network protection

designed for:
- realisation of constant control of electrical parameters of the supply network, such as voltage in the network and current flowing through each of the phases;
- de-energising the retracting winding of the external switching relay (starter) in case of exceeding the set current value or in case of voltage mismatch with the set values, in order to protect electrical equipment from damage;
- protection of electrical equipment under indirect impact of lightning discharges and impulse overvoltages arising as a result of switching transients;
- control of serviceability of the replaceable protection unit (hereinafter referred to as "RPC");
- providing the possibility of remote monitoring of supply network parameters, control of external switching relay (starter);

MCZU1 are used in single-phase AC electrical circuits with voltage 220V, MCZU2, MCZU3 are used in three-phase AC electrical circuits with voltage 380V.
The devices allow constant operation, both in remote control mode and in autonomous, not controlled from a computer mode. In the case of stand-alone use only, the settings and modes of operation will be determined either by the factory setting or by the settings made by the user when the units are connected to the remote control network.