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. 413-1653
FabrikantnummerGV2ME223
106,40 €
Each
Aantal stuks
20 → 25 A 3P TeSys 4 kA Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 900-7066
FabrikantnummerRP2330
FabrikantAltech
149,56 €
Each
Aantal stuks
- 2 - 1250 A - - - - - - - - RP
RS-stocknr. 136-7849
FabrikantnummerSM1X1202
FabrikantLovato
7,20 €
Each
Aantal stuks
10 A 2 - - Screw 690 V - 9mm 80mm 90mm 9 x 80 x 90 mm SM1 Motor Protection Circuit Breakers SM1X
RS-stocknr. 136-7841
FabrikantnummerSM1R1400
FabrikantLovato
55,04 €
Each
Aantal stuks
9 → 14 A 3 - 100 (Ics) kA, 100 (Icu) kA Screw 690 V Rotary Knob 44.8mm 91.1mm 96.6mm 44.8 x 91.1 x 96.6 mm High IE3 Efficiency Value Motors SM1R
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. 122-0745
FabrikantnummerMPW18i-3-U010
FabrikantWEG
61,75 €
Each
Aantal stuks
10 A 3 - 50 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18i
RS-stocknr. 122-0741
FabrikantnummerMPW18i-3-D016
FabrikantWEG
52,52 €
Each
Aantal stuks
1.6 A 3 - 100 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18i
RS-stocknr. 900-7053
FabrikantnummerRP2230
FabrikantAltech
123,99 €
Each
Aantal stuks
- 2 - 1250 A - - - - - - - - RP
RS-stocknr. 608-8545
FabrikantnummerGV2P32
184,90 €
Each
Aantal stuks
24 → 32 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS-stocknr. 122-1374
FabrikantnummerMPW40t-3-U010
FabrikantWEG
73,35 €
Each
Aantal stuks
6.3 → 10 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40t
RS-stocknr. 122-1344
FabrikantnummerMPW40-3-D025
FabrikantWEG
56,27 €
Each
Aantal stuks
1.6 → 2.5 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40
RS-stocknr. 243-7044
Fabrikantnummer3RV1011-0FA10
FabrikantSiemens
55,80 €
Each
Aantal stuks
0.35 → 0.5 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 122-1340
FabrikantnummerMPW40-3-C025
FabrikantWEG
48,43 €
Each
Aantal stuks
0.16 → 0.25 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40
RS-stocknr. 122-0722
FabrikantnummerMPW40-3-U001
FabrikantWEG
52,66 €
Each
Aantal stuks
0.63 → 1 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 44.8 x 97.5 x 97.2 mm Motors MPW40
RS-stocknr. 706-1728
Fabrikantnummer3RV2011-0DA10
FabrikantSiemens
60,30 €
Each
Aantal stuks
0.22 → 0.32 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 123-6688
Fabrikantnummer9000-41034-0100400
145,10 €
Each
Aantal stuks
1 → 4 A 4 MICO Intelligent - Cage Clamp 24 V dc - 70mm 80mm 90mm 70 x 80 x 90 mm - -
RS-stocknr. 900-2086
FabrikantnummerMA1.0UM
FabrikantAltech
92,00 €
Each
Aantal stuks
- 3P - 42 kA - - - - - - - - MA
RS-stocknr. 122-1376
FabrikantnummerMPW40t-3-U020
FabrikantWEG
78,49 €
Each
Aantal stuks
16 → 20 A 3 - 50 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40t
RS-stocknr. 127-1496
Fabrikantnummer3RV2021-0KA10
FabrikantSiemens
71,40 €
Each
Aantal stuks
0.9 → 1.25 A 3 Sirius Innovation 100 kA @ 690 V ac Screw 690 V ac Manual 45mm 96.9mm 97mm 45 x 96.9 x 97 mm Three Phase Motors 3RV2
RS-stocknr. 351-5296
Fabrikantnummer140M-C2E-A16
FabrikantAllen Bradley
66,50 €
Each
Aantal stuks
0.1 → 0.16 A 3P - 100 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
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