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
Nieuw
RS-stocknr. 203-3956
Fabrikantnummer3RV2011-1KA25
FabrikantSiemens
€ 99,50
Each
Aantal stuks
9 → 12.5 A 3 SIRIUS 4000 A Cage Clamp 690 V - - - - - - -
Nieuw
RS-stocknr. 203-3907
Fabrikantnummer3RV2411-1AA10
FabrikantSiemens
€ 81,80
Each
Aantal stuks
1.1 → 1.6 A 1 SIRIUS 100000 A Screw 690 V - - - - - - -
RS-stocknr. 711-6464
FabrikantnummerMS132-2.5
FabrikantABB
€ 84,41
Each
Aantal stuks
- 3 - - - 690 V ac - - - - - - MS132
RS-stocknr. 124-3093
Fabrikantnummer3RV2011-0AA20
FabrikantSiemens
€ 55,44
Each
Aantal stuks
0.11 → 0.16 A 3 Sirius Innovation 100 kA @ 400 V ac Cage Clamp 690 V ac Manual 45mm 96.9mm 106mm 45 x 106 x 96.9 mm Three Phase Motors 3RV2
RS-stocknr. 899-5183
FabrikantnummerDC1CU2L
FabrikantAltech
€ 23,65
Each
Aantal stuks
- 1 - 10 kA - - - - - - - - L
RS-stocknr. 755-2927
Fabrikantnummer3RV2311-1FC10
FabrikantSiemens
€ 68,90
Each
Aantal stuks
5 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
RS-stocknr. 706-1762
Fabrikantnummer3RV2011-0KA10
FabrikantSiemens
€ 63,54
Each
Aantal stuks
0.9 → 1.25 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 866-1329
Fabrikantnummer156398 & PKZM0-32/AK
FabrikantEaton
€ 123,55
Each
Aantal stuks
25 → 32 A 3P - 60 kA Screw 690 V ac Manual 45mm 93mm 94mm 45 x 93 x 94 mm - PKZM 0
RS-stocknr. 706-1793
Fabrikantnummer3RV2011-1CA20
FabrikantSiemens
€ 66,33
Each
Aantal stuks
1.8 → 2.5 A 3P Sirius Innovation 10 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 124-3094
Fabrikantnummer3RV2011-0EA15
FabrikantSiemens
€ 71,01
Each
Aantal stuks
0.28 → 0.4 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-stocknr. 136-7834
FabrikantnummerSM1R0063
FabrikantLovato
€ 39,87
Each
Aantal stuks
0.4 → 0.63 A 3 - 100 (Ics) kA, 100 (Icu) kA Screw 690 V Manual 44.8mm 91.1mm 96.6mm 44.8 x 91.1 x 96.6 mm High IE3 Efficiency Value Motors SM1R
RS-stocknr. 711-6480
FabrikantnummerMS132-25
FabrikantABB
€ 117,30
Each
Aantal stuks
- 3 - - - 690 V ac - - - - - - MS132
RS-stocknr. 136-9688
Fabrikantnummer3RV2031-4JA10
FabrikantSiemens
€ 205,20
Each
Aantal stuks
54 → 65 A 3 Sirius Innovation 65 kA Screw 690 V - 55mm 140mm 149.3mm 55 x 140 x 149.3 mm Motor Protection 3RV2
RS-stocknr. 124-3107
Fabrikantnummer3RV2031-4DA10
FabrikantSiemens
€ 144,00
Each
Aantal stuks
18 → 25 A 3 Sirius Innovation 100 kA @ 400 V ac Screw 690 V ac Manual 55mm 149.4mm 140mm 55 x 140 x 149.4 mm Three Phase Motors SRV2
RS-stocknr. 122-1338
FabrikantnummerMPW40i-3-U040
FabrikantWEG
€ 110,66
Each
Aantal stuks
40 A 3 - 30 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40i
Nieuw
RS-stocknr. 203-3905
Fabrikantnummer3RV2021-1CA10
FabrikantSiemens
€ 76,90
Each
Aantal stuks
1.8 → 2.5 A 3 SIRIUS 10000 A Screw 690 V - - - - - - -
RS-stocknr. 711-6461
FabrikantnummerMS132-1.6
FabrikantABB
€ 84,41
Each
Aantal stuks
- 3 - - - 690 V ac - - - - - - MS132
Nieuw
RS-stocknr. 203-3904
Fabrikantnummer3RV2011-4AA25
FabrikantSiemens
€ 103,00
Each
Aantal stuks
11 → 16 A 1 SIRIUS 4000 A Cage Clamp 690 V - - - - - - -
RS-stocknr. 351-5511
Fabrikantnummer140M-D8E-C25
FabrikantAllen Bradley
€ 131,00
Each
Aantal stuks
18 → 25 A - - 30 kA Screw 575 V - 90mm 72mm 84mm 90 x 72 x 84 mm - 140M
RS-stocknr. 899-5189
FabrikantnummerDC1CU25L
FabrikantAltech
€ 23,65
Each
Aantal stuks
Maximum of 25 A 1 - 10 kA Screw 125 V dc Manual 17.5mm 109mm 66.5mm 17.5 x 109 x 66.5 mm - L
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