Eaton PKZM0-25/NHI11 Motor Protection with Phase-Failure Sensitivity

The Eaton PKZM0-25/NHI11 is a motor-protective circuit breaker designed for motor protection in industrial electrical systems. It provides adjustable overload and fixed short-circuit protection through a thermomagnetic switching method. Its compact form and DIN-rail mounting support use in machinery panels and motor control assemblies.

- Adjustable overload protection responds within the 20–25 A setting range to match connected motor load requirements.
- Fixed instantaneous short-circuit release operates at 388 A to disconnect fault current conditions.
- Phase-failure sensitivity supports protective tripping behavior in the event of phase loss.
- Rotary actuation provides manual switching control for normal operation and protective reset functions.

- Rated operational voltage reaches 690 V with rated uninterrupted current of 25 A.
- Rated operational power is 5.5 kW at 220/230 V, 12.5 kW at 380/400 V and 440 V, 15 kW at 500 V, and 22 kW at 690 V.
- Rated short-circuit breaking capacity at 400 V AC is 50 kA Icu and 38 kA Ics.
- Three-pole construction uses screw terminals and supports snap-on mounting to 7.5 mm or 15 mm IEC/EN 60715 top-hat rail.
- IP20 protection and pollution degree 3 support installation within control panel environments.

- Motor branch protection in industrial control panels
- Machinery and equipment motor starter assemblies
- Electrical systems requiring adjustable motor overload and short-circuit protection