Motor Protection Circuit Breakers

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.


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Description Price Current Range Number of Poles Range Breaking Capacity Terminal Type Voltage Rating Reset Method Length Width Depth Dimensions For Use With Series
RS Stock No. 900-2080
Mfr. Part No.MA1.6UM
BrandAltech
PHP4,844.98
Each
units
- 3P - 42 kA - - - - - - - - MA
RS Stock No. 899-5189
Mfr. Part No.DC1CU25L
BrandAltech
PHP1,244.81
Each
units
Maximum of 25 A 1 - 10 kA Screw 125 V dc Manual 17.5mm 109mm 66.5mm 17.5 x 109 x 66.5 mm - L
RS Stock No. 900-7041
Mfr. Part No.RP2101
BrandAltech
PHP9,892.73
Each
units
- 2 - 1250 A - - - - - - - - RP
RS Stock No. 900-7050
Mfr. Part No.RP2203
BrandAltech
PHP5,856.02
Each
units
- 2 - 1250 A - - - - - - - - RP
RS Stock No. 899-5240
Mfr. Part No.DC2CU30L
BrandAltech
PHP2,489.61
Each
units
Maximum of 30 A 2 - 10 kA Screw 250 V dc Manual 35mm 109mm 66.5mm 35 x 109 x 66.5 mm - L
RS Stock No. 899-5256
Mfr. Part No.DC2DU10L
BrandAltech
PHP2,489.61
Each
units
- 2 - 10 kA - - - - - - - - L
RS Stock No. 899-5183
Mfr. Part No.DC1CU2L
BrandAltech
PHP1,244.81
Each
units
- 1 - 10 kA - - - - - - - - L
RS Stock No. 899-5243
Mfr. Part No.DC2CU15L
BrandAltech
PHP2,489.61
Each
units
Maximum of 15 A 2 - 10 kA Screw 250 V dc Manual 35mm 109mm 66.5mm 35 x 109 x 66.5 mm - L
RS Stock No. 900-7072
Mfr. Part No.RP4330
BrandAltech
PHP8,933.30
Each
units
- 4 - 1250 A - - - - - - - - RP
RS Stock No. 899-5215
Mfr. Part No.DC1DU1L
BrandAltech
PHP1,244.81
Each
units
Maximum of 1 A 1 - 10 kA Screw 125 V dc Manual 17.5mm 109mm 66.5mm 17.5 x 109 x 66.5 mm - L
RS Stock No. 900-7066
Mfr. Part No.RP2330
BrandAltech
PHP7,874.37
Each
units
- 2 - 1250 A - - - - - - - - RP
RS Stock No. 899-5234
Mfr. Part No.DC2CU10L
BrandAltech
PHP2,489.61
Each
units
Maximum of 10 A 2 - 10 kA Screw 250 V dc Manual 35mm 109mm 66.5mm 35 x 109 x 66.5 mm - L
RS Stock No. 900-2109
Mfr. Part No.MA16UM
BrandAltech
PHP5,302.15
Each
units
- 3P - 14 kA - - - - - - - - MA
RS Stock No. 899-5202
Mfr. Part No.DC1CU8L
BrandAltech
PHP1,244.81
Each
units
- 1 - 10 kA - - - - - - - - L
RS Stock No. 900-7075
Mfr. Part No.RP4403
BrandAltech
PHP12,939.96
Each
units
- 4 - 1250 A - - - - - - - - RP
RS Stock No. 899-5259
Mfr. Part No.DC2CU5L
BrandAltech
PHP2,489.61
Each
units
Maximum of 5 A 2 - 10 kA Screw 250 V dc Manual 35mm 109mm 66.5mm 35 x 109 x 66.5 mm - L
RS Stock No. 900-3792
Mfr. Part No.P95UB
BrandAltech
PHP2,626.66
Each
units
- - - - - - - - - - - 3 Phase UL1077/508 Busbar P95
RS Stock No. 900-2119
Mfr. Part No.MA25UM
BrandAltech
PHP5,843.82
Each
units
- 3P - 20 kA - - - - - - - - MA
RS Stock No. 899-5177
Mfr. Part No.DC1CU10L
BrandAltech
PHP1,244.81
Each
units
- 1 - 10 kA - - - - - - - - L
RS Stock No. 900-7057
Mfr. Part No.RP2303
BrandAltech
PHP7,201.28
Each
units
- 2 - 1250 A - - - - - - - - RP