Motor protection circuit breakers act as protection devices for electric motors, monitoring the electrical supply in motor circuits of 50-60Hz. They protect against phase unbalances and losses, which are detrimental to motors, offer protection against current overload, and prevent short circuits.
What are motor protection circuit breakers used for?
Motor protection circuit breakers are useful in industrial and building applications such as chillers, compressors, heat pumps and cooling towers, to prevent damages from short circuits or power surges. In the manufacturing industry, circuit breakers interrupt electrical faults below the breaking capacity, which protects machinery and equipment from blowouts.
Types of motor protection circuit breakers
Motor protection circuit breakers come in A type or B type classifications, dependent on utilisation and function.
The A type breaker is not explicitly intended for selectivity and does not allow intentional short time delay under short circuit conditions.This means that the system interrupts immediately when current or voltage levels match the breaking capacity.
Type B breakers allow for an intentional and adjustable short time delay under short circuit conditions, which enables the system to continue for a short while with currents exceeding breaking capacity levels.
Description:
Professional range of motor protection switches from the
MS32 series. The switches can be either vertically or horizontally mounted onto 35 mm DIN Rail. The switches incorporate an automatic switch-off at current and thermal and magnetic releases. 35 mm DIN ...
Description:
SM1 is a series of motor protection circuit
breakers with an integrated magnetic trip indicator which avoid closing operations during short-circuit conditions.This range of circuit breakers features thermal and magnetic releases and high breaking capacity.
Description:
The Siemens circuit-breaker for motor protection used screw
terminal type and trip class 10. It has standard switching capacity and its size of contactor is S00. The contactor assemblies have screw and snap on onto 35mm standard mounting rails. Overload ...
Description:
Protecting your motors from faults such as an
overload of high voltage, short circuits, or relay shutdowns is vital in an age where any downtime can be detrimental to a business and its operations. Schneider Electric has built a reliable, ...
