PKZ 2 Motor and System-Protective Circuit-Breakers

Plug-in trip blocks: Fast adaption to engineering changes

Various plug-in trip blocks allow the PKZ 2 to be converted in no time at all. 3-pole and 4-pole trip blocks are available for motor and system protection. Differential signalling clearly indicates the switching states of the circuit-breaker.

Auxiliary contact modules, voltage releases or trip-indicating auxiliary contacts can be fitted quickly and easily.
When used in combination with the PKZ 2 basic unit, the ZMR-PKZ 2 plug-in trip block with overload relay function switches off the downstream contactor rather than disconnecting the circuit-breaker in the event of a motor overload. The PKZ 2 thus remains switched on and does not need to be manually reset.

Locally and remotely: switching and signalling

PKZ 2 has intelligent accessories to allow flexible solutions for a wide range of communication tasks. The RS-PKZ 2 electronic remote operator can be actuated directly, without any coupling elements from the semi-conductor outputs of a PLC (24 V DC).

With electrical isolation between CONTROL and LINE, it can take the power for the switching process from a separate power supply (e.g. 230 V 50 Hz).

On the RE-PKZ 2 – the electronic remote operator for standard applications – CONTROL and LINE are separate inputs, although they use the same potential reference. This allows actuation by low consumption units, such as control circuit devices.