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.


...
Lees meer Lees minder

Filters

21 - 40 van 498 producten worden weergegeven
Resultaten per pagina
Omschrijving Prijs Current Range Number of Poles Range Breaking Capacity Terminal Type Voltage Rating Reset Method Length Width Depth Dimensions For Use With Series
RS-stocknr. 744-6882
FabrikantnummerGV2RT07
€ 87,05
Each
Aantal stuks
1.6 → 2.5 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.5mm 89 x 44.5 x 78.5 mm - GV2R
RS-stocknr. 395-0223
FabrikantnummerGV2ME16
€ 81,95
Each
Aantal stuks
9 → 14 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 395-0217
FabrikantnummerGV2ME20
€ 83,20
Each
Aantal stuks
13 → 18 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 246-5027
Fabrikantnummer3RV1041-4KA10
FabrikantSiemens
€ 254,00
Each
Aantal stuks
57 → 75 A 3P Sirius Innovation 50 kA Screw 690 V - 165mm 70mm 174mm 165 x 70 x 174 mm - 3RV1
RS-stocknr. 305-2161
FabrikantnummerGV2P06
€ 93,20
Each
Aantal stuks
1 → 1.6 A 3P TeSys 100 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS-stocknr. 706-1778
Fabrikantnummer3RV2011-1AA20
FabrikantSiemens
€ 68,60
Each
Aantal stuks
1.1 → 1.6 A 3P Sirius Innovation 100 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 492-1541
FabrikantnummerPKZM01-63
FabrikantEaton
€ 54,43
Each
Aantal stuks
4 → 6.3 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS-stocknr. 351-5375
Fabrikantnummer140M-C2E-B63
FabrikantAllen Bradley
€ 71,90
Each
Aantal stuks
4 → 6.3 A 3P - 100 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
RS-stocknr. 212-7961
FabrikantnummerPKZM0-25
FabrikantEaton
€ 110,00
Each
Aantal stuks
20 → 25 A 3P - 40 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 706-1822
Fabrikantnummer3RV2011-1HA10
FabrikantSiemens
€ 71,60
Each
Aantal stuks
5.5 → 8 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 818-176
FabrikantnummerPKZM0-4
FabrikantEaton
€ 74,58
Each
Aantal stuks
2.5 → 4 A 3P - 60 kA - 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 706-1800
Fabrikantnummer3RV2011-1EA10
FabrikantSiemens
€ 71,60
Each
Aantal stuks
2.8 → 4 A 3P Sirius Innovation 6 kA Screw 690 V - 109mm 45mm 91mm 109 x 45 x 91 mm - 3RV2
RS-stocknr. 395-0289
FabrikantnummerGV2ME06
€ 70,50
Each
Aantal stuks
1 → 1.6 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 706-1863
Fabrikantnummer3RV2021-4DA10
FabrikantSiemens
€ 106,00
Each
Aantal stuks
20 → 25 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 706-1787
Fabrikantnummer3RV2011-1BA10
FabrikantSiemens
€ 71,60
Each
Aantal stuks
1.4 → 2 A 3P Sirius Innovation 10 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 312-5231
FabrikantnummerPKZM0-0,63-T
FabrikantEaton
€ 64,79
Each
Aantal stuks
0.4 → 0.63 A 3P - 150 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 246-5011
Fabrikantnummer3RV1041-4JA10
FabrikantSiemens
€ 228,00
Each
Aantal stuks
45 → 63 A 3P Sirius Innovation 50 kA Screw 690 V - 165mm 70mm 174mm 165 x 70 x 174 mm - 3RV1
RS-stocknr. 246-4967
Fabrikantnummer3RV1031-4EA10
FabrikantSiemens
€ 165,00
Each
Aantal stuks
22 → 32 A 3P Sirius Innovation 4 kA Screw 690 V - 140mm 55mm 149mm 140 x 55 x 149 mm - 3RV1
RS-stocknr. 331-3646
FabrikantRS PRO
€ 36,77
Each
Aantal stuks
4 → 6 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS-stocknr. 246-5049
Fabrikantnummer3RV1041-4MA10
FabrikantSiemens
€ 300,00
Each
Aantal stuks
80 → 100 A 3P Sirius Innovation 50 kA Screw 690 V - 165mm 70mm 174mm 165 x 70 x 174 mm - 3RV1
Related Products
Low voltage squirrel-cage motor with aluminum frame are ...
Description:
Low voltage squirrel-cage motor with aluminum frame are suitable for a wide range of standard drive tasks in the industrial environment. Thanks to their particular low weight, they are predestined for applications in pumps, fans, compressors, conveyor systems and lifting ...
SIRIUS 3RM1 motor starters are compact devices 22.5 ...
Description:
SIRIUS 3RM1 motor starters are compact devices 22.5 mm wide, combining a large number of functions in a single enclosure.They consist of combinations of relay contacts, power semiconductors (hybrid technology), and a solid-state overload relay for switching induction under normal ...
Modular Motor Protective Circuit Breakers designed for use ...
Description:
Modular Motor Protective Circuit Breakers designed for use with add-on contactor modules and accessories which provide isolation, short circuit and thermal protection. The units are DIN-rail mounting and part of the xStart family of control gear products, and a range ...
Designed to be used in conjunction with the ...
Description:
Designed to be used in conjunction with the Allen Bradley 100-C contactor range to provide type 2 co-ordination without oversizing of the contactor, in rating up to 22kW. The breaker may be customised to suit individual requirements. Trip Class 10Short ...