Description
The WM1 is a moulded case circuit breaker (MCCB) for AC 50 Hz circuits rated up to 800 V (400 V for WM1-63) and up to 800 A, with a rated insulation voltage of 800 V. It is used for infrequent switching and infrequent motor starting, and protects circuits and equipment against overload, short circuit and under-voltage.
Protection
- Thermal-magnetic protection against overload and short circuit.
- Under-voltage protection to safeguard connected equipment.
- Rated insulation voltage 800 V; working voltage up to 800 V (400 V for WM1-63).
Where it fits
- Distribution boards and control panels as a feeder or sub-main breaker.
- Motor and machinery circuits requiring infrequent switching.
- Building, utility and OEM equipment where a compact breaker is needed.
Selection and ordering
Provide the system voltage, the load current, the pole configuration and the required breaking capacity, and confirm whether the circuit is a distribution or motor circuit. We will confirm the correct rating and trip type and provide a quotation.
FAQ
How do I pick the rated current for an MCCB?
Choose a rating that protects the cable and load without tripping at normal operating current. Share your voltage, load current and application and we will recommend the correct model.
Is the WM1 suitable for motor starting?
Yes. It is suitable for infrequent motor starting and infrequent switching within its rated current.
What breaking capacity do I need?
Match the breaking capacity to the prospective short-circuit current at the installation point; it is higher closer to the supply transformer.
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.
