EATON (MOELLER) PKZM0-32 278489

Eaton (Moeller) PKZM0-32 Motor Protective Circuit Breaker

Description

The PKZM0-32 from Eaton’s Moeller series is a high-performance motor protective circuit breaker designed for switching and protecting three-phase induction motors up to 15 kW (at 400V AC). It provides combined short-circuit and overload protection in a single compact device. This unit features a rotary handle for manual operation and a clear trip indication. This specific assembly includes a front-mounted NHI-E-11-PKZ0 auxiliary contact.

Specifications

• Manufacturer: Eaton (Moeller)
• Model: PKZM0-32
• Part Number: 278489
• Number of Poles: 3
• Overload Release Setting Range: 25 – 32 A
• Rated Operational Voltage (Ue): up to 690V AC
• Release System: Thermal-magnetic
• Frequency: 50/60 Hz
• Auxiliary Contact: Includes 1x NHI-E-11-PKZ0 (1 NO + 1 NC)

Label Info

• Uimp: 6000 V
• Standards: IEC/EN 60947, UL, CSA, ATEX
• Short-circuit breaking capacity (Icu) at 400V: 50 kA

Application

Ideal for motor protection in a wide range of industrial applications, including conveyor systems, pumps, fans, and machine tools. Its ATEX certification also allows for use in potentially explosive atmospheres.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned item, you are helping to avoid the production of a new one, saving an estimated 14 kg of CO2 emissions. This is comparable to the emissions from driving a car for 70 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the difference between the PKZM0-32 and a standard thermal overload relay?

The PKZM0-32 is a Motor Protective Circuit Breaker (MPCB). It combines both thermal overload protection (adjustable, for overcurrent) and magnetic short-circuit protection in a single, self-contained unit. A standard thermal overload relay only provides overcurrent protection and must be used in conjunction with a separate short-circuit protection device like a fuse or circuit breaker.

Can this PKZM0-32 be used for single-phase motor protection?

Yes, while designed for three-phase applications, it can be used for single-phase motors. To do this, you must wire the three poles in series according to the manufacturer’s instructions to ensure proper thermal sensing and tripping characteristics for the single-phase load.

What is the purpose of the auxiliary contact NHI-E-11-PKZ0 attached to this unit?

The NHI-E-11-PKZ0 is an auxiliary contact block that provides additional signaling contacts. It has one normally open (NO) and one normally closed (NC) contact. These contacts can be used in a control circuit to indicate the status (ON/OFF/TRIP) of the MPCB to a PLC, indicator light, or to interlock it with other devices in the control system.

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Last Update: Friday, March 13, 2026