Residual current circuit breaker with overcurrent protection KZS-4M 3P+N AC C16/0.03 002174024

Reliable protection of electrical circuits with KZS-4M circuit breaker

The KZS-4M residual current circuit breaker with overcurrent protection is a comprehensive solution ensuring the safety of electrical installations. It protects against electric shock, short circuits and overloads, making it an ideal choice for both professional installers and end-users. The device is designed for use in TN-S, TN-C-S, TT and IT networks where the neutral and earth conductors are separated.

Functionality and technical parameters

The circuit breaker combines the functions of an overcurrent and residual current device, providing double protection. A rated differential current of 0.03A effectively reacts to leakage currents to ground, minimizing the risk of electric shock. Characteristic C allows it to react more slowly to short current surges, therefore it tolerates well the starting of devices with a motor. The rated short-circuit breaking capacity of 6kA guarantees effective disconnection of the circuit in the event of a failure. The design of the device allows connection of conductors with a cross-section from 1 mm² to 35 mm², which provides flexibility during installation.

• Thanks to the rated current of 16A, the circuit breaker is suitable for most standard household and commercial circuits.
• The C tripping characteristic provides optimal protection against overloads and short circuits, especially in circuits with inductive devices.
• High short-circuit breaking capacity of 6kA guarantees effective disconnection of the circuit in the event of a failure.
• Protection class IP20 protects against touching dangerous live parts and against access of solid objects.
• The 4-pole (3P+N) design provides comprehensive protection of the entire circuit, including the neutral conductor.
• AC sensitivity allows detection of alternating residual currents.

Comfort of installation and use

The KZS-4M circuit breaker is characterized by a compact design occupying 4 modules in width, which facilitates installation in a switchboard. It also has a function of contact status indication and the possibility of sealing the lever in the ON/OFF position, which increases safety and prevents accidental adjustment. Connection terminals allow the use of both solid (up to 25 mm²) and stranded (up to 35 mm²) conductors. Additionally, the manufacturer offers the possibility of mounting auxiliary contacts PS KZS-2M/4M to extend the functionality of the device.