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Why Choose CWNE Moulded Case Circuit Breakers

CWNE produces the WM1 range under ISO 9001, ISO 14001 and OHSAS 18001 management systems with CCC-certified products. Thermal-magnetic, electronic and residual current versions cover distribution and motor circuits, and custom requirements are supported.

Applications

Moulded Case Circuit Breaker FAQ

What current range do the WM1 series cover?

The WM1 range covers rated currents up to 800 A with a rated insulation voltage of 800 V.

When should I choose an electronic MCCB?

Choose an electronic MCCB when you need adjustable, selective protection such as overload long-time and short-circuit short-time settings for coordinated systems.

Do you offer residual current MCCBs?

Yes. The WM1L and WM1EL series add residual current (earth-leakage) protection to protect against earth faults.

How to Choose a Moulded Case Circuit Breaker

Choose a moulded case circuit breaker by rated current and voltage, breaking capacity and trip type, then decide whether residual current protection is needed.

Choose the trip type

ModelTypeNotes
WM1Thermal-magneticGeneral distribution and motor protection, up to 800 A
WM1EElectronicAdjustable overload and short-circuit settings for selectivity
WM1LResidual currentAdds earth-fault protection for 400 V, up to 630 A
WM1ELResidual current operatedIntegrates residual current relay and contactor for four-wire systems

Confirm the parameters

  • Rated current and voltage, and the required breaking capacity.
  • Whether adjustable or electronic protection is needed for selectivity.
  • Whether earth-leakage protection is required.

What to send for a quotation

Provide the system voltage, load current, pole configuration, required breaking capacity, trip type and any earth-leakage requirement.

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