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

61 - 80 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. 246-4894
Fabrikantnummer3RV1021-1KA10
FabrikantSiemens
80,90 €
Each
Aantal stuks
9 → 12.5 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 96mm 97 x 45 x 96 mm - 3RV1
RS-stocknr. 211-4482
FabrikantnummerPKZM0-20
FabrikantEaton
93,06 €
Each
Aantal stuks
16 → 20 A 3P - 40 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 818-744
FabrikantnummerPKZM0-10
FabrikantEaton
86,35 €
Each
Aantal stuks
6.3 → 10 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 351-5375
Fabrikantnummer140M-C2E-B63
FabrikantAllen Bradley
78,50 €
Each
Aantal stuks
4 → 6.3 A 3P - 100 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
RS-stocknr. 755-2729
Fabrikantnummer3RV1042-4MA10
FabrikantSiemens
526,00 €
Each
Aantal stuks
100 A 3P Sirius Innovation 100 kA Screw 690 V ac/dc - 165mm 70mm 174mm 165 x 70 x 174 mm - -
RS-stocknr. 684-3581
Fabrikantnummer0916603
FabrikantPhoenix Contact
11,29 €
Each
Aantal stuks
- - 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-stocknr. 492-1743
FabrikantnummerPKZM01-16
FabrikantEaton
76,02 €
Each
Aantal stuks
10 → 16 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS-stocknr. 608-8365
FabrikantnummerGV2L32
147,99 €
Each
Aantal stuks
23 → 32 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
RS-stocknr. 395-0346
FabrikantnummerGV2ME01
59,35 €
Each
Aantal stuks
0.1 → 0.16 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
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
RS-stocknr. 413-1580
FabrikantnummerGV2ME073
72,55 €
Each
Aantal stuks
1.6 → 2.5 A 3P TeSys - Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-stocknr. 351-5331
Fabrikantnummer140M-C2E-B10
FabrikantAllen Bradley
73,70 €
Each
Aantal stuks
0.63 → 1 A 3P - 100 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
RS-stocknr. 243-7167
Fabrikantnummer3RV1011-1HA10
FabrikantSiemens
66,80 €
Each
Aantal stuks
5.5 → 8 A 3P Sirius Innovation 50 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 608-8359
FabrikantnummerGV2L22
116,26 €
Each
Aantal stuks
16 → 24 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
RS-stocknr. 818-104
FabrikantnummerPKZM0-0,16
FabrikantEaton
55,52 €
Each
Aantal stuks
0.1 → 0.16 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 619-4713
FabrikantnummerPKZM4-63
FabrikantEaton
254,76 €
Each
Aantal stuks
55 → 65 A 3P - 60 kA Screw 690 V ac - 140mm 55mm 160mm 140 x 55 x 160 mm - PKZM 4
RS-stocknr. 619-4735
FabrikantnummerPKZM4-50
FabrikantEaton
240,92 €
Each
Aantal stuks
40 → 50 A 3P - 60 kA Screw 690 V ac - 140mm 55mm 160mm 140 x 55 x 160 mm - PKZM 4
RS-stocknr. 243-7101
Fabrikantnummer3RV1011-1BA10
FabrikantSiemens
66,80 €
Each
Aantal stuks
1.4 → 2 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 706-1765
Fabrikantnummer3RV2011-0JA10
FabrikantSiemens
64,80 €
Each
Aantal stuks
0.7 → 1 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 121-6848
FabrikantRS PRO
27,69 €
Each
Aantal stuks
0.63 → 1 A 3 - 100 kA @ 230 V Screw 690 V Automatic 45mm 89.5mm 78.5mm 45 x 89.5 x 78.5 mm Motor Protection Switches MS32
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 ...