ETI KZS-2M differential circuit breaker 1P+N 16A B type AC 10kA (2173304)

This ETI KZS-2M differential circuit breaker is designed to provide combined protection for electrical circuits against overload, short circuit, and leakage currents. It is used in distribution boards of residential, commercial, and auxiliary premises where overcurrent protection and residual current protection need to be integrated into a single device. The 1P+N configuration means the unit monitors the phase conductor and neutral, which is especially relevant for single-phase installations with increased safety requirements. The device is rated at 16 A, making it suitable for protecting lighting circuits, socket groups, and individual loads with moderate current demand. The B tripping characteristic is intended for circuits without significant inrush currents and ensures fast disconnection under fault conditions. A residual current rating of 0.3 A allows the breaker to respond to dangerous leakage currents, helping reduce the risk of damage to the installation and connected equipment. Type AC indicates compatibility with sinusoidal alternating residual currents, which corresponds to standard AC network applications. The breaking capacity of 10 kA enables the device to interrupt high short-circuit currents, making it appropriate for systems where stronger fault currents may occur. The rated frequency of 50/60 Hz ensures operation in commonly used electrical networks. For installation and wiring, the unit supports conductor cross-sections from 1 mm² to 25 mm², which simplifies connection in standard switchboards and provides flexibility during assembly. Compliance with IEC/EN 61009 confirms that the device is manufactured in accordance with the requirements for differential circuit breakers. Overall, the KZS-2M series model is a practical solution for single-phase lines that require coordinated protection against overload, short circuit, and leakage current in one modular enclosure.