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 81 - 100 of 372 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. 124-3101
Mfr. Part No.3RV2021-1DA10
BrandSiemens
$120.79
Each
units
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
RS Stock No. 706-1825
Mfr. Part No.3RV2011-1HA20
BrandSiemens
$122.32
Each
units
5.5 8 A 3P Sirius Innovation 6 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 706-1737
Mfr. Part No.3RV2011-0DA20
BrandSiemens
$78.42
Each
units
0.22 0.32 A 3P Sirius Innovation 100 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 123-6688
Mfr. Part No.9000-41034-0100400
$250.02
Each
units
1 4 A 4 MICO Intelligent - Cage Clamp 24 V dc - 70mm 80mm 90mm 70 x 80 x 90 mm - -
RS Stock No. 124-3102
Mfr. Part No.3RV2021-1EA10
BrandSiemens
$120.89
Each
units
2.8 4 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. 123-6689
Mfr. Part No.9000-41034-0100600
$315.08
Each
units
1 A, 2 A, 4 A, 6 A 4 MICO Intelligent - Cage Clamp 24 V dc - 70mm 80mm 90mm 70 x 80 x 90 mm - -
RS Stock No. 706-1829
Mfr. Part No.3RV2011-1JA10
BrandSiemens
$346.65
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. 124-3096
Mfr. Part No.3RV2011-0KA15
BrandSiemens
$136.19
Each
units
0.9 1.25 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. 706-1740
Mfr. Part No.3RV2011-0GA10
BrandSiemens
$104.13
Each
units
0.45 0.63 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 774-0159
Mfr. Part No.PKE32
BrandEaton
$111.73
Each
units
8 32 A 3P - 100 kA Screw 690 V ac - 101mm 45mm 102.5mm 101 x 45 x 102.5 mm - PKE
RS Stock No. 706-1762
Mfr. Part No.3RV2011-0KA10
BrandSiemens
$117.25
Each
units
0.9 1.25 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 445-0392
Mfr. Part No.MS116-10
BrandABB
$144.00
Each
units
6.30 10 A 3P - 50 kA Screw 690 V ac - - - - 45 x 90 x 85.6 mm - MS116
RS Stock No. 146-9050
Mfr. Part No.BF26T2A230
BrandLovato
$261.27
Each
units
45 A 4 - - - 230 V ac - 61mm 90mm 90mm 61 x 90 x 90 mm Motor Protection BF
RS Stock No. 124-3111
Mfr. Part No.3RV2321-1AC10
BrandSiemens
$118.89
Each
units
Maximum of 1.6 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. 243-7117
Mfr. Part No.3RV1011-1CA10
BrandSiemens
$139.29
Each
units
1.8 2.5 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS Stock No. 706-1771
Mfr. Part No.3RV2011-0KA20
BrandSiemens
$117.25
Each
units
0.9 1.25 A 3P Sirius Innovation 100 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS Stock No. 706-1875
Mfr. Part No.3RV2021-4EA10
BrandSiemens
$210.17
Each
units
27 32 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
RS Stock No. 706-1857
Mfr. Part No.3RV2021-4BA20
BrandSiemens
$148.64
Each
units
14 20 A 3P Sirius Innovation 4 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
RS Stock No. 124-3103
Mfr. Part No.3RV2021-1GA10
BrandSiemens
$119.52
Each
units
4.5 6.3 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. 706-1724
Mfr. Part No.3RV2011-0CA20
BrandSiemens
$102.35
Each
units
0.18 0.25 A 3P Sirius Innovation 100 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
Related Products
Professional range of motor protection switches from the ...
Description:
Professional range of motor protection switches from the MS32 series. The switches can be either vertically or horizontally mounted onto 35 mm DIN Rail. The switches incorporate an automatic switch-off at current and thermal and magnetic releases. 35 mm DIN ...
SM1 is a series of motor protection circuit ...
Description:
SM1 is a series of motor protection circuit breakers with an integrated magnetic trip indicator which avoid closing operations during short-circuit conditions.This range of circuit breakers features thermal and magnetic releases and high breaking capacity.
Protecting your motors from faults such as an ...
Description:
Protecting your motors from faults such as an overload of high voltage, short circuits, or relay shutdowns is vital in an age where any downtime can be detrimental to a business and its operations. Schneider Electric has built a reliable, ...