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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Omschrijving Prijs Current Range Number of Poles Range Breaking Capacity Terminal Type Voltage Rating Reset Method Length Width Depth Dimensions For Use With Series
RS-stocknr. 395-0201
FabrikantnummerGV2ME22
€ 104,60
Each
Aantal stuks
20 → 25 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 351-5533
Fabrikantnummer140M-F8E-C45
FabrikantAllen Bradley
€ 234,00
Each
Aantal stuks
32 → 45 A - - 65 kA Screw 575 V - 110mm 54mm 109.5mm 110 x 54 x 109.5 mm - 140M
RS-stocknr. 243-7101
Fabrikantnummer3RV1011-1BA10
FabrikantSiemens
€ 66,80
Each
Aantal stuks
1.4 → 2 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 123-6693
Fabrikantnummer9000-41042-0100600
€ 92,79
Each
Aantal stuks
1 A, 2 A, 4 A, 6 A 2 - - Cage Clamp 24 V dc - 36mm 80mm 90mm 36 x 80 x 90 mm - -
RS-stocknr. 121-6847
FabrikantRS PRO
€ 28,24
Each
Aantal stuks
0.4 → 0.63 A 3 - 100 kA @ 230 V Screw 690 V Automatic 45mm 89.5mm 78.5mm 45 x 89.5 x 78.5 mm Motor Protection Switches MS32
RS-stocknr. 706-1844
Fabrikantnummer3RV2011-4AA10
FabrikantSiemens
€ 83,50
Each
Aantal stuks
11 → 16 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
RS-stocknr. 608-8567
FabrikantnummerGV2RT08
€ 87,05
Each
Aantal stuks
2.5 → 4 A 3P TeSys - - 690 V - 89mm 44.5mm 78.5mm 89 x 44.5 x 78.5 mm - GV2R
RS-stocknr. 246-4945
Fabrikantnummer3RV1021-4DA10
FabrikantSiemens
€ 103,00
Each
Aantal stuks
20 → 25 A 3P Sirius Innovation 50 kA Screw 690 V - 97mm 45mm 96mm 97 x 45 x 96 mm - 3RV1
RS-stocknr. 492-1513
FabrikantnummerPKZM01-1.6
FabrikantEaton
€ 57,19
Each
Aantal stuks
1 → 1.6 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS-stocknr. 395-0318
FabrikantnummerGV2ME03
€ 59,35
Each
Aantal stuks
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-stocknr. 492-1529
FabrikantnummerPKZM01-2,5
FabrikantEaton
€ 68,97
Each
Aantal stuks
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-stocknr. 122-1342
FabrikantnummerMPW40-3-C063
FabrikantWEG
€ 50,37
Each
Aantal stuks
0.4 → 0.63 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40
RS-stocknr. 754-6660
Fabrikantnummer3RV1011-0EA15
FabrikantSiemens
€ 82,70
Each
Aantal stuks
0.4 A 3P Sirius Innovation 100 kA Screw 690 V ac/dc - 90mm 45mm 81mm 90 x 45 x 81 mm - -
RS-stocknr. 608-8551
FabrikantnummerGV2RT06
€ 87,05
Each
Aantal stuks
1 → 1.6 A 3P TeSys - - 690 V - 89mm 44.5mm 78.5mm 89 x 44.5 x 78.5 mm - GV2R
RS-stocknr. 900-2074
FabrikantnummerMA0.25UM
FabrikantAltech
€ 85,87
Each
Aantal stuks
Maximum of 0.25 A 3 - 42 kA Cage Clamp 480Y/277 V ac Manual 52.5mm 89.5mm 74mm 52.5 x 89.5 x 74 mm Motors, Power Supplies, 3 Phase Transformers MA
RS-stocknr. 305-2199
FabrikantnummerGV2P10
€ 93,20
Each
Aantal stuks
4 → 6.3 A 3P TeSys 6 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS-stocknr. 797-5572
FabrikantnummerEMS-ROS-T-2.4-24VDC
FabrikantEaton
€ 156,00
Each
Aantal stuks
0.18 → 2.4 A 1 ATEX 3 A Screw 24 V dc, 550 V ac Manual 123.5mm 157mm 30mm 123.5 x 157 x 30 mm - -
RS-stocknr. 764-9075
FabrikantnummerMS116-20
FabrikantABB
€ 86,00
Each
Aantal stuks
16 → 20 A 3 MS Range 15 kA Screw 690 V ac - 97.8mm 45mm 86.6mm 97.8 x 45 x 86.6 mm - MS116
RS-stocknr. 121-6853
FabrikantRS PRO
€ 32,30
Each
Aantal stuks
6.3 → 10 A 3 - 100 kA @ 230 V Screw 690 V Automatic 45mm 89.5mm 78.5mm 45 x 89.5 x 78.5 mm Motor Protection Switches MS32
RS-stocknr. 608-8365
FabrikantnummerGV2L32
€ 147,99
Each
Aantal stuks
23 → 32 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
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