2173307 Диф. автоматичний вимикач KZS-2M B 32/0,3 тип AC (10kA)

This ETI KZS-2M differential circuit breaker is intended for protecting electrical lines against overload, short circuit, and leakage current. It is used in distribution boards of residential, commercial, and small industrial installations where overcurrent protection and residual-current protection need to be combined in a single modular device. The 1+N pole configuration provides switching of the phase and neutral conductors, which makes the device suitable for single-phase circuits. The device is rated at 32 A and has a B tripping characteristic. This means it is designed for circuits with relatively low inrush currents, such as lighting circuits and socket-outlet groups. The AC type indicates operation with sinusoidal alternating residual currents. The rated residual current of 0.3 A defines the sensitivity of leakage protection and allows the breaker to disconnect a damaged circuit in time when insulation faults occur or leakage current exceeds the set threshold. A breaking capacity of 10 kA makes the device suitable for networks where higher short-circuit currents may be present. This parameter is important in modern distribution systems, as it helps ensure safe interruption of fault currents at the protected line. The rated frequency of 50/60 Hz allows use in electrical networks with standard supply frequencies. The permissible conductor cross-section is 1–25 mm², which gives flexibility during installation and compatibility with commonly used cable sizes. The product complies with IEC/EN 61009, the standard for residual current circuit breakers with overcurrent protection. This is a significant specification when selecting modular equipment for electrical panels, as it confirms the device category and its intended application. ETI KZS-2M can be used as a compact solution for branch-circuit protection in installations where one modular unit must perform both overcurrent and leakage-current functions.