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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Description Prix Current Range Number of Poles Range Breaking Capacity Terminal Type Voltage Rating Reset Method Length Width Depth Dimensions For Use With Series
N° de stock RS 124-3101
Référence fabricant3RV2021-1DA10
MarqueSiemens
69,21 €
Each
Unité
2.2 → 3.2 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
N° de stock RS 818-176
Référence fabricant072737 & PKZM0-4
MarqueEaton
63,70 €
Each
Unité
2.5 → 4 A 3P - 60 kA - 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
N° de stock RS 818-160
Référence fabricant072736 & PKZM0-2,5
MarqueEaton
63,70 €
Each
Unité
1.6 → 2.5 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
N° de stock RS 706-1819
Référence fabricant3RV2011-1GA10
MarqueSiemens
66,33 €
Each
Unité
4.5 → 6.3 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
N° de stock RS 246-4989
Référence fabricant3RV1031-4GA10
MarqueSiemens
268,64 €
Each
Unité
36 → 45 A 3P Sirius Innovation 4 kA Screw 690 V - 140mm 55mm 149mm 140 x 55 x 149 mm - 3RV1
N° de stock RS 305-2228
Référence fabricantGV2P20
101,72 €
Each
Unité
13 → 18 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
N° de stock RS 400-1439
Référence fabricantGV2ME21
79,20 €
Each
Unité
17 → 23 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
N° de stock RS 706-1822
Référence fabricant3RV2011-1HA10
MarqueSiemens
66,33 €
Each
Unité
5.5 → 8 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
N° de stock RS 706-1875
Référence fabricant3RV2021-4EA10
MarqueSiemens
124,20 €
Each
Unité
27 → 32 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
N° de stock RS 243-7094
Référence fabricant3RV1011-1AA10
MarqueSiemens
67,86 €
Each
Unité
1.1 → 1.6 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
N° de stock RS 706-1796
Référence fabricant3RV2011-1DA10
MarqueSiemens
66,33 €
Each
Unité
2.2 → 3.2 A 3P Sirius Innovation 10 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
N° de stock RS 706-1774
Référence fabricant3RV2011-1AA10
MarqueSiemens
63,54 €
Each
Unité
1.1 → 1.6 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
N° de stock RS 246-4894
Référence fabricant3RV1021-1KA10
MarqueSiemens
82,16 €
Each
Unité
9 → 12.5 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 96mm 97 x 45 x 96 mm - 3RV1
N° de stock RS 211-4482
Référence fabricant046988 & PKZM0-20
MarqueEaton
80,08 €
Each
Unité
16 → 20 A 3P - 40 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
N° de stock RS 797-5572
Référence fabricant192394 & EMS2-ROS-T-3-24VDC
MarqueEaton
133,95 €
Each
Unité
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 - -
N° de stock RS 305-2199
Référence fabricantGV2P10
85,55 €
Each
Unité
4 → 6.3 A 3P TeSys 6 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
N° de stock RS 413-1596
Référence fabricantGV2ME083
66,60 €
Each
Unité
2.5 → 4 A 3P TeSys - Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
N° de stock RS 818-148
Référence fabricant072734 & PKZM0-1
MarqueEaton
59,05 €
Each
Unité
0.63 → 1 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
N° de stock RS 608-8517
Référence fabricantGV2P04
80,66 €
Each
Unité
0.4 → 0.63 A 3P TeSys 100 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
N° de stock RS 866-1307
Référence fabricantXTPR6P3BC1
MarqueEaton
72,12 €
Each
Unité
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 - -