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. 608-8321
FabrikantnummerGV2L14
78,85 €
Each
Aantal stuks
5.5 → 8 A, 7 → 10 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
RS-stocknr. 243-7145
Fabrikantnummer3RV1011-1FA10
FabrikantSiemens
66,80 €
Each
Aantal stuks
3.5 → 5 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 492-1507
FabrikantnummerPKZM01-1
FabrikantEaton
63,02 €
Each
Aantal stuks
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-stocknr. 395-0318
FabrikantnummerGV2ME03
59,35 €
Each
Aantal stuks
0.25 → 0.4 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. 124-3108
Fabrikantnummer3RV2031-4EA10
FabrikantSiemens
167,00 €
Each
Aantal stuks
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
RS-stocknr. 124-3101
Fabrikantnummer3RV2021-1DA10
FabrikantSiemens
74,70 €
Each
Aantal stuks
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-stocknr. 312-5269
FabrikantnummerPKZM0-2,5-T
FabrikantEaton
73,11 €
Each
Aantal stuks
1.6 → 2.5 A 3P - 150 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 413-1619
FabrikantnummerGV2ME143
83,45 €
Each
Aantal stuks
6 → 10 A 3P TeSys 10 kA Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 818-132
FabrikantnummerPKZM0-0,63
FabrikantEaton
68,20 €
Each
Aantal stuks
0.4 → 0.63 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 395-0295
FabrikantnummerGV2ME05
70,50 €
Each
Aantal stuks
0.63 → 1 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 413-1568
FabrikantnummerGV2ME053
72,55 €
Each
Aantal stuks
0.63 → 1 A 3P TeSys - Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 395-0201
FabrikantnummerGV2ME22
104,60 €
Each
Aantal stuks
20 → 25 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 706-1829
Fabrikantnummer3RV2011-1JA10
FabrikantSiemens
80,30 €
Each
Aantal stuks
7 → 10 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
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. 243-7094
Fabrikantnummer3RV1011-1AA10
FabrikantSiemens
63,50 €
Each
Aantal stuks
1.1 → 1.6 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 818-160
FabrikantnummerPKZM0-2,5
FabrikantEaton
74,58 €
Each
Aantal stuks
1.6 → 2.5 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 246-4989
Fabrikantnummer3RV1031-4GA10
FabrikantSiemens
212,00 €
Each
Aantal stuks
36 → 45 A 3P Sirius Innovation 4 kA Screw 690 V - 140mm 55mm 149mm 140 x 55 x 149 mm - 3RV1
RS-stocknr. 706-1774
Fabrikantnummer3RV2011-1AA10
FabrikantSiemens
68,60 €
Each
Aantal stuks
1.1 → 1.6 A 3P Sirius Innovation 100 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
Related Products
Covers motors up to 16A (7.5kW)Local isolatorProtects against ...
Description:
Covers motors up to 16A (7.5kW)Local isolatorProtects against overloads, short circuits, phase failure and faults in cabling or wiringThese Motor Starters can be used in conjunction with ABB Contactors, stock no. 445-0897 typicallyAccessories available from auxiliary/signal contacts to under voltage ...
Highly conductive auxiliary contacts with four contact pointsQuick ...
Description:
Highly conductive auxiliary contacts with four contact pointsQuick connect - snap on accessory mountingDistinct contact status indicationUp to four auxiliary contacts can be mountedMechanical interlock only 5mm deepPositive (force) guided contacts (mechanically-linked per IEC)three-pole contactors, 9 to 110A IEC ...
Maximum rated current 100A (45kW @ 400V a.c.)Rated ...
Description:
Maximum rated current 100A (45kW @ 400V a.c.)Rated operational voltage: 690VShort-circuit proof to 50kA @ 400V a.c.Maximum switching frequency; 15 operations/hourMechanical life; 105 operationsAmbient temperature range; –20 to +60 ° CLong term stabilityManual resetLockable in off position.
Overload protection compensated -5 to +40°CLockable in 'OFF' ...
Description:
Overload protection compensated -5 to +40°CLockable in 'OFF' positionShort circuit protection, therefore, no back-up fuse protection is required where the prospective fault level is less than the breaking capacity of the unitExpected life cycles 0.1 x 106Maximum switching frequency 40 ...