2173302 Диф. автоматичний вимикач KZS-2M B 10/0,3 тип AC (10kA)

The ETI KZS-2M series differential automatic circuit breaker is designed to protect electrical lines against overload, short circuit, and residual current. It is used in distribution boards of residential, administrative, and commercial facilities where combined overcurrent and differential protection is required in a single device. By integrating the functions of an automatic circuit breaker and a residual current protective device, it helps reduce the number of separate modules in the panel and simplifies circuit arrangement. This model has a 1+N pole configuration, meaning one protected pole and a neutral conductor. The rated current is 10 A, which makes it suitable for group circuits with moderate load. The B tripping characteristic is intended for circuits with low inrush currents, such as lighting lines and standard household consumers. The rated residual current of 0.3 A provides tripping when the leakage current exceeds the specified threshold, helping monitor insulation condition and increasing electrical safety in the installation. The AC type indicates that the device is designed to respond to sinusoidal alternating residual current. The breaking capacity of 10 kA allows use in networks where higher short-circuit currents may occur, provided this matches the design requirements of the installation. The rated frequency of 50/60 Hz ensures compatibility with common power systems. The permissible conductor cross-section range of 1–25 mm² broadens installation options and supports connection in various internal power distribution schemes. The device complies with IEC/EN 61009, the standard governing residual current operated circuit breakers with integral overcurrent protection. This compliance confirms that the product is intended for use as a protective element in electrical distribution boards and meets the technical requirements applicable to this equipment class. With its 10 A current rating, 0.3 A residual current setting, B curve, AC type, 1+N pole design, and 10 kA breaking capacity, this device is a practical solution for protecting group circuits in modern electrical installations.