Eaton PKZM0-25 25A 3P

Eaton PKZM0-25 motor circuit breaker, 25 A, 3-pole

Eaton's PKZM0-25 motor circuit breaker is a compact device designed to reliably protect three-phase motors from the effects of short circuits and overloads, featuring a manual rotary drive with an easy-to-read status indication. The apparatus provides selective, fast and repeatable protection response, enabling safe control and disconnection of circuits in apLications of industrial and building.

• Motor rated current setting range of up to 25 A with precise, stepped adjustment.
• Integrated short-circuit and overload protection in accordance with IEC/EN standards.
• Manual rotary drive with clear I/0 position marking and interlocking capability.
• Compact modular housing for DIN rail or backplane mounting.
• High switching capacity and coordination with Eaton switchgear and contactors.
• Expandable with auxiliary contacts and additional signaling and mounting accessories.

Application and protection functions

The PKZM0-25 motor circuit breaker is designed for direct protection of three-phase motors, pumps, fans, compressors and machine drives in industrial environments. It protects motor windings from the effects of long-term overload thanks to the thermal module, and from short circuits thanks to the high-speed electromagnetic module. The device can serve as a motor switch, allowing frequent manual switching on and off of the drive without the need for additional switches. It also works with contactors, creating starting and reversing systems with the required degree of coordination.

The apparatus is suitable for use in switchgear and control cabinets where high reliability and ease of servicing are required. Thanks to its compact dimensions, it saves space in control fields and modular power distribution systems. Adjustable setting current allows the protection to be matched to the specific motor parameters specified on the nameplate, minimizing the risk of unwanted shutdowns at start-up. The PKZM0-25 is designed for operation in typical industrial conditions, ensuring stable operation at varying ambient temperatures.

Design, installation and operation

The PKZM0-25 motor circuit breaker has a robust, enclosed housing made of insulating plastic with high mechanical and electrical strength. On the front of the apparatus, there is a large drive knob for convenient manual control, as well as a current setting scale that allows precise setting of the value in accordance with the rated current of the motor. The operating positions are clearly marked, making it easy to quickly check the status of the device. The built-in tripping mechanism operates independently of the operating speed, guaranteeing proper tripping of the protection under overload or short-circuit conditions.

The apparatus is suitable for mounting on a standard DIN rail, which simplifies integration into existing switchgear systems and allows quick replacement in the event of installation upgrades. The connection terminals allow for safe and secure connection of power cables and load, while maintaining the appropriate screw tightening torque. The unit's design includes the ability to retrofit auxiliary contacts, triggers and other Eaton accessories to support extensive signaling and remote diagnostic functions in automation systems.

Safety expLoatation and integration in systems

The PKZM0-25 meets the requirements of the relevant standards for low-voltage switchgear and protection apparatus, ensuring adequate selectivity and level of protection for motor loads. The switching capacity of the apparatus is selected to effectively reduce the effects of short circuits in typical low-voltage networks, while limiting damage to the installation. The use of materials with high ciepLn resistance and the appropriate design of current paths reduce the risk of overheating and extend the expLoatation life of the switch.

Thanks to its compatibility with other components of Eaton's power distribution and control systems, the PKZM0-25 motor circuit breaker can be easily incorporated into extensive automation systems. Coordinated sets with contactors and overload protection can be created, simplifying the design of starting systems and motor control solutions. Clear markings and available technical documentation facilitate the selection of the apparatus in terms of motor current, category of use and environmental requirements.

Eaton's PKZM0-25 motor circuit breaker combines effective motor protection and manual switch function in a single, compact enclosure, simplifying design and expLoatation of installations. Thanks to its compatibility with Eaton's system solutions and expandability with accessories, it is a flexible component of modern automation and power distribution systems.