Residual current circuit breaker with overcurrent protection KZS-4M 3P+N AC B16/0.03 002174004

Residual Current Device with Overcurrent Protection KZS-4M 3p+N AC B16/0.03 is a reliable and proven solution for protecting electrical installations. It is used to protect against electric shock, both direct and indirect, and to protect devices from fire in the event of insulation damage. Additionally, it protects circuits against short circuits and overloads.

This four-pole switch (3 protected poles + N pole) is designed for use in TN-S, TN-C-S, TT and IT networks where the neutral and earth conductors are separated. Its B-type tripping characteristic ensures a quick response to current increase, which is particularly important in circuits with devices with high inrush current. AC sensitivity means that the switch reacts to alternating differential currents.

Application and benefits:

• Comprehensive protection: Protects against electric shock, short circuits and overloads in one device.
• Versatility: Can be used in various types of electrical networks (TN-S, TN-C-S, TT, IT).
• Fast response: B characteristic ensures quick disconnection of the circuit in case of overload or short circuit.
• High breaking capacity: The rated short-circuit breaking capacity is 6 kA, which guarantees effective disconnection of the circuit in the event of a failure.
• Safety of use: It has a test button to check functionality and a contact position indicator for easy identification of the device status (ON/OFF).
• Easy installation: 4 module width makes it easy to install in a distribution board.
• Connection flexibility: Possibility of connecting solid conductors with a cross-section of 1…25 mm² and stranded conductors 1…35 mm².

Construction and parameters:

The KZS-4M switch is characterized by a solid construction and high quality workmanship. It has a protection degree of IP20, which means protection against touching with a finger and against the ingress of solid objects larger than 12.5 mm. The rated current of the device is 16 A at a rated voltage of 400 V and a frequency of 50/60 Hz. The rated differential current is 0.03 A, providing adequate protection against electric shock. The installation depth is 69 mm, which should be taken into account when planning the installation. The energy limitation class is 3 - provides adequate protection in the event of an electric arc.