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. 608-8359
Mfr. Part No.GV2L22
kr 1 192,32
Each
Units
16 → 24 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
RS Stock No. 706-1879
Mfr. Part No.3RV2021-4EA20
BrandSiemens
kr 1 375,86
Each
Units
27 → 32 A 3P Sirius Innovation 4 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
RS Stock No. 492-1541
Mfr. Part No.278483 & PKZM01-6,3
BrandEaton
kr 574,57
Each
Units
4 → 6.3 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS Stock No. 305-2155
Mfr. Part No.GV2P05
kr 1 101,60
Each
Units
0.63 → 1 A 3P TeSys 100 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS Stock No. 492-1484
Mfr. Part No.278477 & PKZM01-0,4
BrandEaton
kr 580,25
Each
Units
0.25 → 0.4 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS Stock No. 818-744
Mfr. Part No.072739 & PKZM0-10
BrandEaton
kr 848,45
Each
Units
6.3 → 10 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS Stock No. 608-8523
Mfr. Part No.GV2P21
kr 1 399,68
Each
Units
17 → 23 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS Stock No. 608-8309
Mfr. Part No.GV2L08
kr 842,40
Each
Units
2.5 → 4 A, 4 → 6 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
RS Stock No. 445-0336
Mfr. Part No.MS116-1.0
BrandABB
kr 583,25
Each
Units
- 3 - - - 690 V ac - - - - - - MS116
RS Stock No. 492-1529
Mfr. Part No.278481 & PKZM01-2,5
BrandEaton
kr 675,97
Each
Units
1.6 → 2.5 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS Stock No. 395-0318
Mfr. Part No.GV2ME03
kr 570,24
Each
Units
0.25 → 0.4 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 706-1740
Mfr. Part No.3RV2011-0GA10
BrandSiemens
kr 625,12
Each
Units
0.45 → 0.63 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 243-7072
Mfr. Part No.3RV1011-0JA10
BrandSiemens
kr 708,87
Each
Units
0.7 → 1 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 706-1780
Mfr. Part No.3RV2011-1BA20
BrandSiemens
kr 734,79
Each
Units
1.4 → 2 A 3P Sirius Innovation 10 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 608-8337
Mfr. Part No.GV2L16
kr 984,96
Each
Units
12 → 18 A, 9 → 13 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
RS Stock No. 124-3114
Mfr. Part No.3RV2321-1EC10
BrandSiemens
kr 775,67
Each
Units
Maximum of 4 A 3 Sirius Innovation 100 kA @ 400 V ac Screw 690 V ac Manual 45mm 96.9mm 97mm 45 x 97 x 96.9 mm Three Phase Motors SRV2
RS Stock No. 413-1574
Mfr. Part No.GV2ME063
kr 764,64
Each
Units
1 → 1.6 A 3P TeSys - Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS Stock No. 413-1631
Mfr. Part No.GV2ME203
kr 894,24
Each
Units
13 → 18 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. 706-1853
Mfr. Part No.3RV2021-4BA10
BrandSiemens
kr 892,32
Each
Units
14 → 20 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 706-1787
Mfr. Part No.3RV2011-1BA10
BrandSiemens
kr 734,79
Each
Units
1.4 → 2 A 3P Sirius Innovation 10 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
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