Residual current circuit breaker with overcurrent protection KZS-2M AC B10/0.03 002173102

Residual Current Device with Overcurrent Protection KZS-2M AC B10/0.03 is a reliable and proven device designed to protect people and electrical installations. It protects against electric shock, both in case of direct and indirect contact with live parts, and also protects against fire hazard resulting from insulation damage. Additionally, it provides protection against the effects of short circuits and overloads in electrical circuits.

This model of circuit breaker is particularly useful in TN-S, TN-C-S, TT and IT networks, where the neutral and earth conductors are separated. Its compact design – it occupies only 2 modules – makes it easy to install in distribution boards. The rated differential current of 0.03A provides effective protection against dangerous leakage currents.

Construction features and application

The KZS-2M AC B10/0.03 circuit breaker combines the functions of an overcurrent circuit breaker (with B characteristic) and a residual current circuit breaker (type AC). Characteristic B means that the circuit breaker reacts quickly to an increase in short-circuit current, but is more tolerant to short-term current surges, which is important when connecting devices with electric motors or other loads with high starting current. Type AC means sensitivity to alternating residual currents – i.e. those most commonly found in domestic and industrial installations.

The application of this circuit breaker includes:

• Protection of circuits with a rated current of 10A
• Protection of electrical installations in residential and public buildings
• Protection of electrical devices against damage caused by short circuits and overloads
• Ensuring the safety of users against electric shock

Operating parameters and installation

The KZS-2M AC B10/0.03 circuit breaker is designed to operate in ambient temperatures from -25°C to 40°C. The possibility of connecting conductors with a cross-section from 1 to 25 mm² (solid or stranded) provides flexibility during installation. The degree of protection IP20 guarantees protection against finger contact, but does not protect against the action of water. The circuit breaker also has a disconnectable N pole, which increases safety during maintenance and repairs. The test button allows the user or installer to regularly check the functionality of the residual current circuit breaker. Additionally, the possibility of sealing the switching lever prevents accidental change of the device status. The rated short-circuit breaking capacity is 10kA at 240V AC and 50Hz frequency.