Differential circuit breaker ETI KZS-2M2p EDI 2P 25A B type A 10kA bottom connection (2172408)

The ETI KZS-2M2p EDI differential circuit breaker is designed to protect electrical circuits against overload, short circuit, and leakage currents. It combines the functions of a circuit breaker and residual current protection in a single modular device, which makes it suitable for use in distribution boards of apartments, private houses, offices, and small commercial facilities. Such protection is especially important in final circuits where both overcurrent control and personal safety against electric shock are required. This model has 2 poles and a rated current of 25 A. The B tripping characteristic is intended for circuits with moderate inrush currents, such as lighting and socket groups. The rated residual current of 0.03 A, or 30 mA, provides protection against leakage currents and supports safe disconnection in emergency conditions. With a breaking capacity of 10 kA, the device can operate in networks where short-circuit currents may reach elevated values. The device is of type A, meaning it responds not only to alternating residual current but also to pulsating direct residual current. This makes it suitable for modern household and office loads that include electronic power supplies and similar equipment. The rated frequency of 50/60 Hz allows use in networks with either of these standard operating frequencies. Bottom connection simplifies wiring in distribution boards and helps arrange conductors according to the installation scheme. The terminal design supports conductor cross-sections from 1 mm² to 25 mm², which provides flexibility when connecting different cable sizes within the permitted range. The device complies with IEC 61009, the standard covering residual current circuit breakers with integral overcurrent protection. In practice, the ETI KZS-2M2p EDI is used wherever it is necessary to combine overcurrent protection and differential protection in one compact modular unit, while maintaining clear installation and reliable circuit separation during fault conditions.