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. 331-3652
FabrikantRS PRO
€ 36,77
Each
Aantal stuks
6 → 10 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS-stocknr. 305-2177
FabrikantnummerGV2P07
€ 93,20
Each
Aantal stuks
1.6 → 2.5 A 3P TeSys 8 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS-stocknr. 866-1316
FabrikantnummerPKZM0-10/AK
FabrikantEaton
€ 144,00
Each
Aantal stuks
6.3 → 10 A 3P - 60 kA Screw 690 V ac Manual 45mm 93mm 94mm 45 x 93 x 94 mm - PKZM 0
RS-stocknr. 243-7123
Fabrikantnummer3RV1011-1DA10
FabrikantSiemens
€ 66,80
Each
Aantal stuks
2.2 → 3.2 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 413-1603
FabrikantnummerGV2ME103
€ 72,55
Each
Aantal stuks
4 → 6.3 A 3P TeSys 50 kA Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 818-104
FabrikantnummerPKZM0-0,16
FabrikantEaton
€ 55,52
Each
Aantal stuks
0.1 → 0.16 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 866-1546
FabrikantnummerXTPR2P5BC1
FabrikantEaton
€ 146,77
Each
Aantal stuks
1.6 → 2.5 A 3P - 25 A@ 250 V dc, 32 A@ 690 V ac Screw 690 V ac Manual 45mm 93mm 94mm 45 x 93 x 94 mm - -
RS-stocknr. 351-5319
Fabrikantnummer140M-C2E-A40
FabrikantAllen Bradley
€ 60,40
Each
Aantal stuks
0.25 → 0.4 A 3P - 100 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
RS-stocknr. 608-8309
FabrikantnummerGV2L08
€ 70,46
Each
Aantal stuks
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-stocknr. 706-1813
Fabrikantnummer3RV2011-1GA20
FabrikantSiemens
€ 71,60
Each
Aantal stuks
4.5 → 6.3 A 3P Sirius Innovation 6 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
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. 797-5550
FabrikantnummerEMS-DO-T-2.4-24VDC
FabrikantEaton
€ 115,00
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. 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. 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. 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. 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. 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. 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. 312-5281
FabrikantnummerPKZM0-4-T
FabrikantEaton
€ 73,11
Each
Aantal stuks
2.5 → 4 A 3P - 150 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
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
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