Eaton's reliable and robust motor protection circuit breakers are the perfect solution for your motor protection needs, providing protection from electrical faults such as an overload of high voltages, short circuits or relay shutdowns.

Down-time of machinery can be detrimental to a business and its operations, Eaton's PKZM0 motor protection range of circuit breakers has been created and designed to act as an intermediary between your devices, protecting vital equipment in the event of unforeseen incidents. This reduces the amount of downtime of machinery to enable operations to continue running smoothly.

The PKZM0 motor protection circuit breakers are matched to the DIL contactor series making the ideal configuration or motor starter combinations. This motor protection range of circuit breakers has a short circuit breaking capacity rated to 150 kA up to 12 A and 50kA up to 32 A. Accessories including auxiliary contacts, trip indicating auxiliary contacts, voltage release and shunt trips can be installed without tools and greatly reduce installation time.

• Manually-actuated motor protective circuit breaker
• Rotating handle with clear switch position (ON and OFF)
• DIN-rail mounting
• Forms part of the xStart family of control gear products
• Rated operating voltage 690Vac
• Typical motor protection accessories – Shunt release 492-1709 & 492-1715, lockable rotary handle 244-0113

MPCBs are more critical now than ever. Most infrastructures now rely on a motor behind the scenes to power critical uninterruptible systems such as heating, ventilation and cooling. These systems are vital in ensuring business continues as usual, therefore must be protected against overcurrent's, thermal overloads and similar problems.

Need a reliable solution to protect your motors from electrical faults? This robust motor-protection circuit breaker (MPCB) from Eaton will terminate power supplies in the event of voltage overloads, short circuits or relay shutdowns. As an intermediary between electrical circuits and applications, it prevents damage to devices and equipment. It's suitable for motors in fans, pumps and compressors. Use this unit to reduce the downtime of instruments and prevent interruptions to workflows. By reducing the chance of electrical fire, it also contributes to workplace safety.

• Short circuit breaking capacity ensures the unit trips the power before damage is caused to equipment
• Accessories like auxiliary contacts and shunt trips can be fitted without using additional tools
• IP20 (ingress protection) rating indicates this MPCB is touch-proof and protected from items over 12mm

Excess current causes a bimetallic strip in the MPCB to trip. This releases a switch, which moves the electrical contact points apart to confine the arc. The arc is divided and cooled by an insulated metal strip. The contacts close again once the fault has been fixed.