Residual current circuit breaker with overcurrent protection KZS-4M 3p+N AC C20/0.03 002174025

Residual Current Circuit Breaker with Overcurrent Protection KZS-4M is a comprehensive solution ensuring the safety of electrical installations and connected devices. It protects against electric shock, short circuits and overloads, making it an indispensable element in any modern electrical circuit. Designed for use in TN-S, TN-C-S, TT and IT networks where the neutral and earth conductors are separated.

Protection and functionality

This four-pole switch (3P+N) combines the functions of an overcurrent and residual current circuit breaker, offering a double layer of protection. A rated differential current of 0.03A ensures a quick response to earth leakage currents, minimizing the risk of electric shock. Characteristic C allows for trouble-free starting of devices with motors that generate short-term current surges – the switch will not trip unnecessarily when turning on a refrigerator or washing machine. The rated short-circuit breaking capacity of 6kA guarantees effective disconnection of the circuit in the event of a serious failure.

Installation and parameters

The KZS-4M switch occupies 4 modules in width, making it easy to install in standard distribution boards. It accepts conductor cross-sections from 1 to 35 mm² (multi-stranded) and from 1 to 25 mm² (solid core), providing flexibility in cable selection. The IP20 degree of protection provides protection against finger contact, which is important from the point of view of safety. A test button allows for regular checking of the correct operation of the residual current device. Additionally, the ability to seal the lever in the ON/OFF position increases safety and prevents accidental switching of the breaker.

For the installer and user

For the installer, this means quick and reliable installation and a guarantee of reliable installation protection. For the user – peace of mind resulting from knowledge of comprehensive protection against electrical hazards. This switch is an ideal solution both in newly built installations and during the modernization of existing ones. Its solid construction and compliance with standards ensure long-term and trouble-free operation.