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. 818-182
FabrikantnummerPKZM0-6,3
FabrikantEaton
74,58 €
Each
Aantal stuks
4 → 6.3 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 492-1535
FabrikantnummerPKZM01-4
FabrikantEaton
58,71 €
Each
Aantal stuks
2.5 → 4 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS-stocknr. 492-1529
FabrikantnummerPKZM01-2,5
FabrikantEaton
68,97 €
Each
Aantal stuks
1.6 → 2.5 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS-stocknr. 492-1507
FabrikantnummerPKZM01-1
FabrikantEaton
63,02 €
Each
Aantal stuks
0.63 → 1 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS-stocknr. 818-132
FabrikantnummerPKZM0-0,63
FabrikantEaton
68,20 €
Each
Aantal stuks
0.4 → 0.63 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 312-5269
FabrikantnummerPKZM0-2,5-T
FabrikantEaton
73,11 €
Each
Aantal stuks
1.6 → 2.5 A 3P - 150 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 818-160
FabrikantnummerPKZM0-2,5
FabrikantEaton
74,58 €
Each
Aantal stuks
1.6 → 2.5 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 818-176
FabrikantnummerPKZM0-4
FabrikantEaton
74,58 €
Each
Aantal stuks
2.5 → 4 A 3P - 60 kA - 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
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. 818-148
FabrikantnummerPKZM0-1
FabrikantEaton
71,28 €
Each
Aantal stuks
0.63 → 1 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 211-4482
FabrikantnummerPKZM0-20
FabrikantEaton
93,06 €
Each
Aantal stuks
16 → 20 A 3P - 40 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 866-1307
FabrikantnummerXTPR6P3BC1
FabrikantEaton
144,00 €
Each
Aantal stuks
4 → 6.3 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. 619-4735
FabrikantnummerPKZM4-50
FabrikantEaton
240,92 €
Each
Aantal stuks
40 → 50 A 3P - 60 kA Screw 690 V ac - 140mm 55mm 160mm 140 x 55 x 160 mm - PKZM 4
RS-stocknr. 492-1743
FabrikantnummerPKZM01-16
FabrikantEaton
76,02 €
Each
Aantal stuks
10 → 16 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
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. 818-744
FabrikantnummerPKZM0-10
FabrikantEaton
86,35 €
Each
Aantal stuks
6.3 → 10 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 492-1490
FabrikantnummerPKZM01-063
FabrikantEaton
48,88 €
Each
Aantal stuks
0.4 → 0.63 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS-stocknr. 619-4713
FabrikantnummerPKZM4-63
FabrikantEaton
254,76 €
Each
Aantal stuks
55 → 65 A 3P - 60 kA Screw 690 V ac - 140mm 55mm 160mm 140 x 55 x 160 mm - PKZM 4
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. 797-5576
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 - -