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. 123-6694
Mfr. Part No.9000-41042-0401000
kr 1 014,66
Each
Units
4 A, 6 A, 8 A, 10 A 2 MICO Intelligent - Cage Clamp 24 V dc - 36mm 80mm 90mm 36 x 80 x 90 mm - -
RS Stock No. 395-0289
Mfr. Part No.GV2ME06
kr 444,40
Each
Units
1 → 1.6 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 395-0245
Mfr. Part No.GV2ME10
kr 457,02
Each
Units
4 → 6.3 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 395-0223
Mfr. Part No.GV2ME16
kr 504,24
Each
Units
9 → 14 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 395-0267
Mfr. Part No.GV2ME07
kr 457,02
Each
Units
1.6 → 2.5 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 212-7955
Mfr. Part No.PKZM0-16
BrandEaton
kr 555,96
Each
Units
10 → 16 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS Stock No. 395-0194
Mfr. Part No.GV2ME32
kr 866,58
Each
Units
24 → 32 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 413-1625
Mfr. Part No.GV2ME163
kr 527,72
Each
Units
9 → 14 A 3P TeSys 6 kA Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 395-0217
Mfr. Part No.GV2ME20
kr 519,90
Each
Units
13 → 18 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 395-0239
Mfr. Part No.GV2ME14
kr 483,03
Each
Units
6 → 10 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 395-0295
Mfr. Part No.GV2ME05
kr 415,87
Each
Units
0.63 → 1 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 711-6452
Mfr. Part No.MS132-1.0
BrandABB
kr 699,89
Each
Units
- 3P - - - 690 V ac - - - - - - MS132
RS Stock No. 395-0302
Mfr. Part No.GV2ME04
kr 399,46
Each
Units
0.4 → 0.63 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 492-1535
Mfr. Part No.PKZM01-4
BrandEaton
kr 458,14
Each
Units
2.5 → 4 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS Stock No. 305-2161
Mfr. Part No.GV2P06
kr 533,28
Each
Units
1 → 1.6 A 3P TeSys 100 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS Stock No. 395-0251
Mfr. Part No.GV2ME08
kr 457,02
Each
Units
2.5 → 4 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 243-7044
Mfr. Part No.3RV1011-0FA10
BrandSiemens
kr 661,01
Each
Units
0.35 → 0.5 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 243-7167
Mfr. Part No.3RV1011-1HA10
BrandSiemens
kr 789,62
Each
Units
5.5 → 8 A 3P Sirius Innovation 50 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 123-6690
Mfr. Part No.9000-41034-0401000
kr 1 713,98
Each
Units
4 A, 6 A, 8 A, 10 A 4 MICO Intelligent - Cage Clamp 24 V dc - 70mm 80mm 90mm 70 x 80 x 90 mm - -
RS Stock No. 706-1872
Mfr. Part No.3RV2021-4DA20
BrandSiemens
kr 1 086,73
Each
Units
20 → 25 A 3P Sirius Innovation 4 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -