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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Description Price Current Range Number of Poles Range Breaking Capacity Terminal Type Voltage Rating Reset Method Length Width Depth Dimensions For Use With Series
RS庫存編號 400-1439
製造零件編號GV2ME21
HK$682.72
單位
17 → 23 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 395-0239
製造零件編號GV2ME14
HK$428.81
單位
6 → 10 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 395-0251
製造零件編號GV2ME08
HK$379.37
單位
2.5 → 4 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 413-1574
製造零件編號GV2ME063
HK$600.00
單位
1 → 1.6 A 3P TeSys - Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 395-0245
製造零件編號GV2ME10
HK$519.89
單位
4 → 6.3 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 395-0289
製造零件編號GV2ME06
HK$519.89
單位
1 → 1.6 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 395-0201
製造零件編號GV2ME22
HK$742.87
單位
20 → 25 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 395-0217
製造零件編號GV2ME20
HK$439.04
單位
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庫存編號 395-0223
製造零件編號GV2ME16
HK$408.82
單位
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庫存編號 395-0267
製造零件編號GV2ME07
HK$374.49
單位
1.6 → 2.5 A 3P TeSys 3 kA Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 413-1653
製造零件編號GV2ME223
HK$651.00
單位
20 → 25 A 3P TeSys 4 kA Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 608-8309
製造零件編號GV2L08
HK$567.53
單位
2.5 → 4 A, 4 → 6 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
RS庫存編號 413-1619
製造零件編號GV2ME143
HK$630.00
單位
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庫存編號 608-8359
製造零件編號GV2L22
HK$792.00
單位
16 → 24 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2L
RS庫存編號 413-1596
製造零件編號GV2ME083
HK$540.00
單位
2.5 → 4 A 3P TeSys - Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 608-8523
製造零件編號GV2P21
HK$1,534.78
單位
17 → 23 A 3P TeSys 4 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS庫存編號 413-1625
製造零件編號GV2ME163
HK$700.00
單位
9 → 14 A 3P TeSys 6 kA Cage Clamp 500 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 744-6914
製造零件編號GV7RS220
HK$8,110.00
單位
132 → 220 A 3P TeSys 10 KA Screw 690 V - 161mm 105mm 126mm 161 x 105 x 126 mm - GV7R
RS庫存編號 395-0324
製造零件編號GV2ME02
HK$423.35
單位
0.16 → 0.25 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.2mm 89 x 44.5 x 78.2 mm - GV2M
RS庫存編號 187-728
製造零件編號GV2RT04
HK$540.00
單位
0.4 → 0.63 A 3P TeSys - - 690 V - 89mm 44.5mm 78.5mm 89 x 44.5 x 78.5 mm - GV2R