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.


...
顯示內容 隱藏內容

篩選條件

正在檢視 61 - 80,共 441 項產品
Results per page
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 706-1787
製造零件編號3RV2011-1BA10
BrandSiemens
HK$558.84
單位
1.4 → 2 A 3P Sirius Innovation 10 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS庫存編號 866-1319
製造零件編號PKZM0-12/AK
BrandEaton
HK$777.68
單位
8 → 12 A 3P - 60 kA Screw 690 V ac Manual 45mm 93mm 94mm 45 x 93 x 94 mm - PKZM 0
RS庫存編號 608-8523
製造零件編號GV2P21
HK$1,585.57
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 312-5297
製造零件編號PKZM0-6,3-T
BrandEaton
HK$743.60
單位
4 → 6.3 A 3P - 150 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
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 246-5011
製造零件編號3RV1041-4JA10
BrandSiemens
HK$1,666.69
單位
45 → 63 A 3P Sirius Innovation 50 kA Screw 690 V - 165mm 70mm 174mm 165 x 70 x 174 mm - 3RV1
RS庫存編號 246-4901
製造零件編號3RV1021-4AA10
BrandSiemens
HK$597.59
單位
11 → 16 A 3P Sirius Innovation 50 kA Screw 690 V - 97mm 45mm 96mm 97 x 45 x 96 mm - 3RV1
RS庫存編號 243-7088
製造零件編號3RV1011-0KA10
BrandSiemens
HK$605.52
單位
0.9 → 1.25 A 3P Sirius Innovation 100 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS庫存編號 492-1484
製造零件編號PKZM01-04
BrandEaton
HK$394.28
單位
0.25 → 0.4 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS庫存編號 331-3551
BrandRS PRO
HK$292.93
單位
0.1 → 0.16 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 395-0194
製造零件編號GV2ME32
HK$930.63
單位
24 → 32 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 331-3567
BrandRS PRO
HK$277.19
單位
0.16 → 0.24 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 331-3573
BrandRS PRO
HK$293.05
單位
0.24 → 0.4 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 395-0302
製造零件編號GV2ME04
HK$415.43
單位
0.4 → 0.63 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 395-0318
製造零件編號GV2ME03
HK$387.72
單位
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庫存編號 899-5183
製造零件編號DC1CU2L
BrandAltech
HK$207.75
單位
- 1 - 10 kA - - - - - - - - L
RS庫存編號 331-3589
BrandRS PRO
HK$293.05
單位
0.4 → 0.6 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 136-7845
製造零件編號SM1R3200
BrandLovato
HK$850.34
單位
24 → 32 A 3 - 25 (Ics) kA, 50 (Icu) kA Screw 690 V Rotary Knob 44.8mm 91.1mm 96.6mm 44.8 x 91.1 x 96.6 mm High IE3 Efficiency Value Motors SM1R
RS庫存編號 331-3680
BrandRS PRO
HK$464.02
單位
20 → 25 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 900-2080
製造零件編號MA1.6UM
BrandAltech
HK$809.04
單位
- 3P - 42 kA - - - - - - - - MA