Circuit breaker for transformer protection 25A PKZM0-25-T 278493

Circuit breaker for transformer protection – reliable installation protection

This three-pole PKZM0-25-T circuit breaker with a rated current of 25A is a solid solution for protecting transformers in electrical installations. Designed for long-term and trouble-free operation, it meets the requirements of IEC/EN 60947 standards, ensuring safety and reliability. This circuit breaker is particularly useful in circuits powering transformers, where high inrush currents occur.

Application and functionality

The PKZM0-25-T circuit breaker is designed to protect single-phase and three-phase transformers with a voltage of up to 690V AC. Thanks to the integrated overload and short-circuit protection, it provides comprehensive protection for the electrical installation. The trip characteristic allows for safe starting of transformers generating high inrush currents, which is crucial in such applications. The possibility of mounting on a TH rail facilitates integration with existing switchgear.

Construction and characteristic features

The circuit breaker has screw terminals, providing a secure and durable connection of wires. The trip indicator informs about the operation of the protection, facilitating the diagnosis of any problems. The circuit breaker housing is characterized by a degree of protection of IP20, which provides protection against touch and limited ingress of solid objects. The rated short-circuit breaking capacity at 50kA at 400V guarantees effective protection in the event of a short circuit. The device is made as a permanently mounted element, which ensures stability and reliability of operation.

For installers:

• The PKZM0-25-T circuit breaker offers quick and easy mounting on a TH rail.
• Screw terminals provide a secure connection of wires – remember the correct tightening torque!
• The built-in thermal and electromagnetic tripping mechanism provides comprehensive transformer protection.
• The Irm value (instantaneous trip current) can be found on the front of the device or in the technical documentation – useful for loop impedance measurements.
• Possibility of expansion with auxiliary contacts, signaling and remote tripping devices increases the functionality of the device.

For end users:

• Provides effective protection of the transformer against overload and short circuit – protects your electrical installation!
• Thanks to the high short-circuit breaking capacity, it minimizes the risk of damage in the event of a failure.
• Solid construction guarantees long-term and trouble-free operation of the device for many years.
• The trip indicator makes it easier to identify the cause of any power supply problem.