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:
Eaton's reliable and robust motor protection circuit breakers
are the perfect solution for protecting your motors from faults such as an overload of high voltages, short circuits or relay shutdowns. Down-time of machinery can be detrimental to a business and ...
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:
DIN rail mounted, mechanically reset protection devices.Transformer short
circuit and overload protectionThe short circuit release is set to 20 x Iu, so even transformers that have high inrush currents have protectionRotary handle for ease of trip indication after a fault ...
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, ...
