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 246-5011
Référence fabricant3RV1041-4JA10
MarqueSiemens
225,34 €
Each
Unité
45 → 63 A 3P Sirius Innovation 50 kA Screw 690 V - 165mm 70mm 174mm 165 x 70 x 174 mm - 3RV1
N° de stock RS 875-1125
Référence fabricant3RV2031-4WA10
MarqueSiemens
203,40 €
Each
Unité
42 → 52 A 3 Sirius Innovation 4 kA Screw 690 V - 140mm 55mm 149mm 140 x 55 x 149 mm Motor Protection 3RV2
N° de stock RS 243-7139
Référence fabricant3RV1011-1EA10
MarqueSiemens
71,28 €
Each
Unité
2.8 → 4 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
N° de stock RS 706-1718
Référence fabricant3RV2011-0BA10
MarqueSiemens
55,44 €
Each
Unité
0.14 → 0.2 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
N° de stock RS 706-1784
Référence fabricant3RV2011-1CA10
MarqueSiemens
66,33 €
Each
Unité
1.8 → 2.5 A 3P Sirius Innovation 10 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
N° de stock RS 246-4967
Référence fabricant3RV1031-4EA10
MarqueSiemens
207,00 €
Each
Unité
22 → 32 A 3P Sirius Innovation 4 kA Screw 690 V - 140mm 55mm 149mm 140 x 55 x 149 mm - 3RV1
N° de stock RS 243-7145
Référence fabricant3RV1011-1FA10
MarqueSiemens
71,28 €
Each
Unité
3.5 → 5 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
N° de stock RS 124-3108
Référence fabricant3RV2031-4EA10
MarqueSiemens
154,80 €
Each
Unité
22 → 32 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
N° de stock RS 706-1863
Référence fabricant3RV2021-4DA10
MarqueSiemens
98,10 €
Each
Unité
20 → 25 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
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 706-1829
Référence fabricant3RV2011-1JA10
MarqueSiemens
74,34 €
Each
Unité
7 → 10 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
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 706-1875
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 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 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 706-1774
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 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 706-1762
Référence fabricant3RV2011-0KA10
MarqueSiemens
63,54 €
Each
Unité
0.9 → 1.25 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
N° de stock RS 706-1800
Référence fabricant3RV2011-1EA10
MarqueSiemens
66,33 €
Each
Unité
2.8 → 4 A 3P Sirius Innovation 6 kA Screw 690 V - 109mm 45mm 91mm 109 x 45 x 91 mm - 3RV2