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.


...
Read more Read less

Filters

Viewing 1 - 20 of 143 products
Results per page
Description Price Current Range Number of Poles Range Breaking Capacity Terminal Type Voltage Rating Reset Method Length Width Depth Dimensions For Use With Series
RS Stock No. 246-5011
Mfr. Part No.3RV1041-4JA10
BrandSiemens
$410.31
Each
units
45 → 63 A 3P Sirius Innovation 50 kA Screw 690 V - 165mm 70mm 174mm 165 x 70 x 174 mm - 3RV1
RS Stock No. 246-4850
Mfr. Part No.3RV1021-1GA10
BrandSiemens
$187.38
Each
units
4.5 → 6.3 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 96mm 97 x 45 x 96 mm - 3RV1
RS Stock No. 246-4894
Mfr. Part No.3RV1021-1KA10
BrandSiemens
$185.17
Each
units
9 → 12.5 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 96mm 97 x 45 x 96 mm - 3RV1
RS Stock No. 706-1819
Mfr. Part No.3RV2011-1GA10
BrandSiemens
$235.53
Each
units
4.5 → 6.3 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 706-1866
Mfr. Part No.3RV2021-4CA10
BrandSiemens
$134.53
Each
units
17 → 22 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 243-7123
Mfr. Part No.3RV1011-1DA10
BrandSiemens
$266.78
Each
units
2.2 → 3.2 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 706-1822
Mfr. Part No.3RV2011-1HA10
BrandSiemens
$110.20
Each
units
5.5 → 8 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 246-4901
Mfr. Part No.3RV1021-4AA10
BrandSiemens
$322.40
Each
units
11 → 16 A 3P Sirius Innovation 50 kA Screw 690 V - 97mm 45mm 96mm 97 x 45 x 96 mm - 3RV1
RS Stock No. 243-7167
Mfr. Part No.3RV1011-1HA10
BrandSiemens
$120.40
Each
units
5.5 → 8 A 3P Sirius Innovation 50 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 706-1829
Mfr. Part No.3RV2011-1JA10
BrandSiemens
$312.30
Each
units
7 → 10 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 243-7139
Mfr. Part No.3RV1011-1EA10
BrandSiemens
$120.40
Each
units
2.8 → 4 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 243-7101
Mfr. Part No.3RV1011-1BA10
BrandSiemens
$121.50
Each
units
1.4 → 2 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 706-1796
Mfr. Part No.3RV2011-1DA10
BrandSiemens
$110.20
Each
units
2.2 → 3.2 A 3P Sirius Innovation 10 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 243-7072
Mfr. Part No.3RV1011-0JA10
BrandSiemens
$265.53
Each
units
0.7 → 1 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 243-7050
Mfr. Part No.3RV1011-0GA10
BrandSiemens
$77.23
Each
units
0.45 → 0.63 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 755-2729
Mfr. Part No.3RV1042-4MA10
BrandSiemens
$592.17
Each
units
100 A 3P Sirius Innovation 100 kA Screw 690 V ac/dc - 165mm 70mm 174mm 165 x 70 x 174 mm - -
RS Stock No. 124-3105
Mfr. Part No.3RV2021-1JA10
BrandSiemens
$120.37
Each
units
7 → 10 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 Stock No. 243-7094
Mfr. Part No.3RV1011-1AA10
BrandSiemens
$115.71
Each
units
1.1 → 1.6 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 875-1125
Mfr. Part No.3RV2031-4WA10
BrandSiemens
$347.98
Each
units
42 → 52 A 3 Sirius Innovation 4 kA Screw 690 V - 140mm 55mm 149mm 140 x 55 x 149 mm Motor Protection 3RV2
RS Stock No. 755-2794
Mfr. Part No.3RV1331-4DC10
BrandSiemens
$202.63
Each
units
25 A 3P Sirius Innovation 50 kA Screw 690 V ac/dc - 140mm 55mm 149mm 140 x 55 x 149 mm - -