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.


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Beskrivning Pris Current Range Number of Poles Range Breaking Capacity Terminal Type Voltage Rating Reset Method Length Width Depth Dimensions For Use With Series
RS-artikelnummer 608-8545
Tillv. art.nrGV2P32
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24 → 32 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
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Tillv. art.nrGV2RT03
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0.25 → 0.4 A 3P TeSys - - 690 V - 89mm 44.5mm 78.5mm 89 x 44.5 x 78.5 mm - GV2R
RS-artikelnummer 899-5268
Tillv. art.nrDC2DU16L
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- 2 - 10 kA - - - - - - - - L
RS-artikelnummer 305-2183
Tillv. art.nrGV2P08
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604,48 kr
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2.5 → 4 A 3P TeSys 8 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS-artikelnummer 136-7872
Tillv. art.nrSM1X9050
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63 A - - - Screw - - - - - - All Busbar, SM1R Motor Protection Circuit Breakers SM1X
RS-artikelnummer 774-0134
Tillv. art.nrPKE12
VarumärkeEaton
388,98 kr
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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-artikelnummer 755-2915
Tillv. art.nr3RV2311-1DC10
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3.2 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - -
RS-artikelnummer 445-0386
Tillv. art.nrMS116-6.3
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604,89 kr
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- 3P - - - 690 V ac - - - - - - MS116
RS-artikelnummer 146-9052
Tillv. art.nrSM2R6300
VarumärkeLovato
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46 → 63 A 3 - 50 kA Screw 400 V Rotary Knob 55mm 144.6mm 125mm 55 x 144.6 x 125 mm Motor Protection SM2R
RS-artikelnummer 351-5404
Tillv. art.nr140M-C2E-C16
VarumärkeAllen Bradley
795,83 kr
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10 → 16 A 3P - 50 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
RS-artikelnummer 706-1841
Tillv. art.nr3RV2021-4AA10
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11 → 16 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-artikelnummer 122-1343
Tillv. art.nrMPW40-3-D016
VarumärkeWEG
581,87 kr
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1 → 1.6 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40
RS-artikelnummer 413-1603
Tillv. art.nrGV2ME103
VarumärkeSchneider Electric
545,40 kr
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4 → 6.3 A 3P TeSys 50 kA Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS-artikelnummer 124-3112
Tillv. art.nr3RV2321-1BC10
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643,13 kr
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Maximum of 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-artikelnummer 866-1303
Tillv. art.nrXTPR004BC1
VarumärkeEaton
1 327,94 kr
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2.5 → 4 A 3P - 25 A@ 250 V dc, 32 A@ 690 V ac Screw 690 V ac Manual 45mm 93mm 94mm 45 x 93 x 94 mm - -
RS-artikelnummer 122-1369
Tillv. art.nrMPW40t-3-C063
VarumärkeWEG
579,51 kr
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0.4 → 0.63 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40t
RS-artikelnummer 122-1345
Tillv. art.nrMPW40-3-U004
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548,95 kr
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2.5 → 4 A 3 - 100 kA/415V Screw 690 V Manual 97mm 45mm 98mm 45 x 98 x 97.2 mm Motors MPW40
RS-artikelnummer 121-6853
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320,53 kr
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6.3 → 10 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
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RS-artikelnummer 196-3569
Tillv. art.nr3VA12255GF420AA0
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175 → 250 A 4 Sentron 85 @ 240 V kA Front, Lug 600 V dc, 690 V ac Manual 140mm 91mm 158mm 140 x 70 x 158 mm Line Protection 3VA1
RS-artikelnummer 706-1790
Tillv. art.nr3RV2011-1DA20
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2.2 → 3.2 A 3P Sirius Innovation 10 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
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