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. 243-7173
Fabrikantnummer3RV1011-1JA10
FabrikantSiemens
79,65 €
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7 → 10 A 3P Sirius Innovation 50 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 122-0735
FabrikantnummerMPW18-3-U018
FabrikantWEG
65,51 €
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12 → 18 A 3 - 10 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18
RS-stocknr. 492-1541
FabrikantnummerPKZM01-63
FabrikantEaton
54,43 €
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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-stocknr. 755-2927
Fabrikantnummer3RV2311-1FC10
FabrikantSiemens
68,90 €
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5 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
RS-stocknr. 305-2183
FabrikantnummerGV2P08
85,55 €
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2.5 → 4 A 3P TeSys 8 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS-stocknr. 351-5347
Fabrikantnummer140M-C2E-B16
FabrikantAllen Bradley
75,90 €
Each
Aantal stuks
1 → 1.6 A 3P - 100 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
RS-stocknr. 797-5576
FabrikantnummerEMS-ROS-T-9-24VDC
FabrikantEaton
156,00 €
Each
Aantal stuks
1.5 → 6.5 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. 619-4684
FabrikantnummerPKZM4-16
FabrikantEaton
150,70 €
Each
Aantal stuks
10 → 16 A 3P - 60 kA Screw 690 V ac - 140mm 55mm 160mm 140 x 55 x 160 mm - PKZM 4
RS-stocknr. 706-1787
Fabrikantnummer3RV2011-1BA10
FabrikantSiemens
66,33 €
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Aantal stuks
1.4 → 2 A 3P Sirius Innovation 10 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 305-2161
FabrikantnummerGV2P06
85,55 €
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Aantal stuks
1 → 1.6 A 3P TeSys 100 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS-stocknr. 445-0314
FabrikantnummerMS116-0.4
FabrikantABB
55,50 €
Each
Aantal stuks
- 3P - - - 690 V ac - - - - - - MS116
RS-stocknr. 351-5369
Fabrikantnummer140M-C2E-B40
FabrikantAllen Bradley
78,50 €
Each
Aantal stuks
2.5 → 4 A 3P - 100 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
RS-stocknr. 136-7862
FabrikantnummerSM1X18200
FabrikantLovato
36,60 €
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Aantal stuks
- - - - - - - 200 (Rod)mm - - - SM1R Motor Protection Circuit Breakers SM1X
RS-stocknr. 445-0320
FabrikantnummerMS116-0.63
FabrikantABB
55,50 €
Each
Aantal stuks
- 3P - - - 690 V ac - - - - - - MS116
RS-stocknr. 706-1746
Fabrikantnummer3RV2011-0FA20
FabrikantSiemens
55,80 €
Each
Aantal stuks
0.35 → 0.5 A 3P Sirius Innovation 100 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 124-3095
Fabrikantnummer3RV2011-0HA15
FabrikantSiemens
74,97 €
Each
Aantal stuks
0.55 → 0.8 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
Nieuw
RS-stocknr. 196-3571
Fabrikantnummer3VA21635MQ360AA0
FabrikantSiemens
956,86 €
Each
Aantal stuks
25 → 63 A 3 Sentron 85 @ 240 V kA Box, Front 690 V ac - 105mm 107mm 181mm 105 x 86 x 181 mm Motor Protection 3VA2
RS-stocknr. 122-0746
FabrikantnummerMPW18i-3-U016
FabrikantWEG
61,75 €
Each
Aantal stuks
16 A 3 - 10 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18i
RS-stocknr. 755-2814
Fabrikantnummer3RV1341-4MC10
FabrikantSiemens
388,24 €
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Aantal stuks
100 A 3P Sirius Innovation 50 kA Screw 690 V ac/dc - 165mm 70mm 174mm 165 x 70 x 174 mm - -
RS-stocknr. 122-1368
FabrikantnummerMPW40t-3-D004
FabrikantWEG
52,52 €
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Aantal stuks
0.25 → 0.4 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40t
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