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. 122-0732
FabrikantnummerMPW18-3-D063
FabrikantWEG
53,70 €
Each
Aantal stuks
4 → 6.3 A 3 - 100 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18
RS-stocknr. 122-0735
FabrikantnummerMPW18-3-U018
FabrikantWEG
65,51 €
Each
Aantal stuks
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. 122-1363
FabrikantnummerMPW40i-3-U020
FabrikantWEG
64,60 €
Each
Aantal stuks
20 A 3 - 50 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40i
RS-stocknr. 122-1361
FabrikantnummerMPW40i-3-U010
FabrikantWEG
61,19 €
Each
Aantal stuks
10 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40i
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. 122-0737
FabrikantnummerMPW18i-3-C025
FabrikantWEG
45,11 €
Each
Aantal stuks
0.25 A 3 - 100 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18i
RS-stocknr. 122-1364
FabrikantnummerMPW40i-3-U025
FabrikantWEG
77,31 €
Each
Aantal stuks
25 A 3 - 50 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40i
RS-stocknr. 122-0731
FabrikantnummerMPW18-3-U004
FabrikantWEG
53,70 €
Each
Aantal stuks
2.5 → 4 A 3 - 100 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18
RS-stocknr. 122-1365
FabrikantnummerMPW40i-3-U032
FabrikantWEG
95,41 €
Each
Aantal stuks
32 A 3 - 50 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40i
RS-stocknr. 122-0744
FabrikantnummerMPW18i-3-D063
FabrikantWEG
52,52 €
Each
Aantal stuks
6.3 A 3 - 100 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18i
RS-stocknr. 122-1357
FabrikantnummerMPW40i-3-D016
FabrikantWEG
52,62 €
Each
Aantal stuks
1.6 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40i
RS-stocknr. 122-1362
FabrikantnummerMPW40i-3-U016
FabrikantWEG
61,64 €
Each
Aantal stuks
16 A 3 - 50 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40i
RS-stocknr. 122-0723
FabrikantnummerMPW40t-3-U001
FabrikantWEG
58,63 €
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 Transformers MPW40t
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. 122-0729
FabrikantnummerMPW18-3-D016
FabrikantWEG
53,70 €
Each
Aantal stuks
1 → 1.6 A 3 - 100 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18
RS-stocknr. 122-1343
FabrikantnummerMPW40-3-D016
FabrikantWEG
56,27 €
Each
Aantal stuks
1 → 1.6 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40
RS-stocknr. 122-1346
FabrikantnummerMPW40-3-D063
FabrikantWEG
56,27 €
Each
Aantal stuks
4 → 6.3 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40
RS-stocknr. 122-1350
FabrikantnummerMPW40-3-U032
FabrikantWEG
110,94 €
Each
Aantal stuks
25 → 32 A 3 - 50 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40
RS-stocknr. 122-1358
FabrikantnummerMPW40i-3-D025
FabrikantWEG
52,24 €
Each
Aantal stuks
2.5 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40i
RS-stocknr. 122-0733
FabrikantnummerMPW18-3-U010
FabrikantWEG
63,26 €
Each
Aantal stuks
6.3 → 10 A 3 - 50 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18