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 341 - 360 of 373 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 Power Rating
RS Stock No. 608-8371
Mfr. Part No.GV2LE06
$109.71
Each
units
1.6 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.5mm 89 x 44.5 x 78.5 mm - GV2L -
RS Stock No. 243-6984
Mfr. Part No.3RV1011-0AA10
BrandSiemens
$95.61
Each
units
0.11 0.16 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1 -
RS Stock No. 243-7066
Mfr. Part No.3RV1011-0HA10
BrandSiemens
$211.53
Each
units
0.55 0.8 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1 -
RS Stock No. 774-0143
Mfr. Part No.PKE12/XTU-1,2
BrandEaton
$279.22
Each
units
0.3 1.2 A 3P - 100 kA Screw 690 V ac - 101mm 45mm 102.5mm 101 x 45 x 102.5 mm - PKE -
RS Stock No. 875-1122
Mfr. Part No.3RV2031-4VA10
BrandSiemens
$352.66
Each
units
35 45 A 3 Sirius Innovation 4 kA Screw 690 V - 140mm 55mm 149mm 140 x 55 x 149 mm Motor Protection 3RV2 -
RS Stock No. 619-4684
Mfr. Part No.PKZM4-16
BrandEaton
$232.09
Each
units
10 16 A 3P - 60 kA Screw 690 V ac - 140mm 55mm 160mm 140 x 55 x 160 mm - PKZM 4 -
RS Stock No. 136-7841
Mfr. Part No.SM1R1400
BrandLovato
$95.99
Each
units
9 14 A 3 - 100 (Ics) kA, 100 (Icu) kA Screw 690 V Rotary Knob 44.8mm 91.1mm 96.6mm 44.8 x 91.1 x 96.6 mm High IE3 Efficiency Value Motors SM1R -
RS Stock No. 392-8119
Mfr. Part No.3RV1011-0DA20
BrandSiemens
$142.30
Each
units
0.28 0.4 A 3P Sirius Innovation 100 kA Cage Clamp 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1 -
RS Stock No. 136-7837
Mfr. Part No.SM1R0250
BrandLovato
$88.87
Each
units
1.6 2.5 A 3 - 100 (Ics) kA, 100 (Icu) kA Screw 690 V Rotary Knob 44.8mm 91.1mm 96.6mm 44.8 x 91.1 x 96.6 mm High IE3 Efficiency Value Motors SM1R -
RS Stock No. 136-7834
Mfr. Part No.SM1R0063
BrandLovato
$69.86
Each
units
0.4 0.63 A 3 - 100 (Ics) kA, 100 (Icu) kA Screw 690 V Rotary Knob 44.8mm 91.1mm 96.6mm 44.8 x 91.1 x 96.6 mm High IE3 Efficiency Value Motors SM1R -
RS Stock No. 136-7846
Mfr. Part No.SM1R4000
BrandLovato
$184.15
Each
units
30 40 A 3 - 10 (Ics) kA, 20 (Icu) kA Screw 690 V Rotary Knob 44.8mm 91.1mm 96.6mm 44.8 x 91.1 x 96.6 mm High IE3 Efficiency Value Motors SM1R -
RS Stock No. 136-7873
Mfr. Part No.SM1Z1710R
BrandLovato
$61.65
Each
units
- - - - - - - 100mm 137.8mm 159mm 100 x 137.8x 159 mm SM1P Motor Protection Circuit Breakers, SM1R Black Handle SM1Z -
RS Stock No. 706-1721
Mfr. Part No.3RV2011-0CA10
BrandSiemens
$92.21
Each
units
0.18 0.25 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2 -
RS Stock No. 684-3581
Mfr. Part No.0916603
$30.90
Each
units
- - CLIPLINE - Screw 28 V dc, 240 V ac - 86mm 12.3mm 96mm 86 x 12.3 x 96 mm - UT 6-TMC M 0.5A -
RS Stock No. 492-1507
Mfr. Part No.PKZM01-1
BrandEaton
$116.97
Each
units
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 Stock No. 706-1850
Mfr. Part No.3RV2021-4AA20
BrandSiemens
$128.51
Each
units
11 16 A 3P Sirius Innovation 4 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - - -
RS Stock No. 136-7852
Mfr. Part No.SM1X1311
BrandLovato
$26.60
Each
units
10 A 2 - - Screw 690 V - 9mm 80mm 90mm 9 x 80 x 90 mm SM1 Motor Protection Circuit Breakers SM1X -
RS Stock No. 136-7862
Mfr. Part No.SM1X18200
BrandLovato
$62.42
Each
units
- - - - - - - 200 (Rod)mm - - - SM1R Motor Protection Circuit Breakers SM1X -
RS Stock No. 774-0140
Mfr. Part No.PKE12/XTU-4
BrandEaton
$263.30
Each
units
1 4 A 3P - 100 kA Screw 690 V ac - 101mm 45mm 102.5mm 101 x 45 x 102.5 mm - PKE -
RS Stock No. 797-5560
Mfr. Part No.EMS-RO-T-2.4-24VDC
BrandEaton
$314.21
Each
units
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 - EMS -
Related Products
The Phoenix Contact LR H3-I-PT-24DC/500AC-9 is a forward ...
Description:
The Phoenix Contact LR H3-I-PT-24DC/500AC-9 is a forward running 3-phase hybrid motor This starter is designed for DIN rail mounting where you need an adjustable overload shutdown and push-in connections. It is used for controlling motor. • Adjustable current for ...
Thanks to the internal interlocking circuit and load ...
Description:
Thanks to the internal interlocking circuit and load wiring, wiring expense in reduced to a minimum Contactron switches motors up to 4kW quickly and reliably. Forward running Motor protection Emergency stop75% less space required75% less wiring time10 times longer service ...
Thanks to the internal interlocking circuit and load ...
Description:
Thanks to the internal interlocking circuit and load wiring, wiring expense in reduced to a minimum Contactron switches motors up to 4kW quickly and reliably. Forward running Motor protection Emergency stop75% less space required75% less wiring time10 times longer service ...
Covers motors up to 16A (75kW)Local isolator Protects ...
Description:
Covers motors up to 16A (75kW)Local isolator Protects against overloads, short circuits, phase failure and faults in cabling or wiring These Motor Starters can be used in conjunction with ABB Contactors, stock no. 445-0897 typically Accessories available from auxiliary/signal contacts ...