Circuit breaker for transformer protection PKZM0-T Push-In 2.5..4A PKZM0-4-T-PI 199170

Transformer protection switch – reliability and quick installation

This three-pole PKZM0-4-T-PI switch from Eaton is a robust solution for protecting transformers in electrical installations. Designed to operate at voltages up to 690V AC, it effectively protects circuits against overload and short circuit, ensuring uninterrupted power supply and user safety. The device combines thermal and electromagnetic protection functions, offering comprehensive protection without the need for additional fuses.

Construction and installation

The PKZM0-4-T-PI switch features a modern mounting solution – Push-in terminals. This technology allows for quick and tool-free connection of wires, reducing wiring time by up to 50% compared to traditional screw terminals. The spring-loaded terminals also provide high resistance to vibration and shock, guaranteeing a stable connection and minimizing the risk of loosening. The possibility of mounting on a DIN rail provides installation flexibility.

Application and benefits

The PKZM0-4-T-PI switch is ideal for protecting single-phase and three-phase transformers in control circuits, switchboards and low-voltage installations of the SELV/PELV/FELV type. Its compact design allows for optimal use of space in control cabinets. The rated short-circuit breaking capacity of 150 kA at 400 V AC guarantees effective protection even in the event of serious disturbances in the network.

• Quick installation: Push-in technology reduces wiring time and simplifies installation.
• High reliability: Spring-loaded terminals ensure a stable connection resistant to vibration.
• Comprehensive protection: Overload and short-circuit protection in one device.
• Wide voltage range: Operation at voltages up to 690 V AC ensures versatility.
• Durable construction: Robust materials guarantee long device life.
• Compliance with standards: Meets the requirements of IEC/EN 60947 standards, ensuring safety.

In addition, the switch has an adjustable overload release setting from 2.5 to 4A, allowing for precise adjustment to the characteristics of the protected circuit. The rated continuous current (Iu) is 4A, and the short-circuit breaking capacity (Icu) at 400 V, 50 Hz is as high as 150 kA – this confirms the high class of the device.