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 1 - 20,共 28 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 121-6856
BrandRS PRO
HK$260.07
單位
17 → 23 A 3 - 25 kA @ 230 V Screw 690 V Automatic 45mm 89.5mm 78.5mm 45 x 89.5 x 78.5 mm Motor Protection Switches MS32
RS庫存編號 331-3668
BrandRS PRO
HK$346.61
單位
10 → 16 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 121-6858
BrandRS PRO
HK$336.63
單位
25 → 32 A 3 - 25 kA @ 230 V Screw 690 V Automatic 45mm 89.5mm 78.5mm 45 x 89.5 x 78.5 mm Motor Protection Switches MS32
RS庫存編號 121-6855
BrandRS PRO
HK$232.21
單位
13 → 18 A 3 - 25 kA @ 230 V Screw 690 V Automatic 45mm 89.5mm 78.5mm 45 x 89.5 x 78.5 mm Motor Protection Switches MS32
RS庫存編號 331-3674
BrandRS PRO
HK$320.45
單位
16 → 20 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 121-6848
BrandRS PRO
HK$187.01
單位
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
RS庫存編號 331-3680
BrandRS PRO
HK$376.10
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 331-3567
BrandRS PRO
HK$237.37
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 121-6851
BrandRS PRO
HK$207.23
單位
2.5 → 4 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
RS庫存編號 331-3589
BrandRS PRO
HK$237.46
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 121-6849
BrandRS PRO
HK$187.01
單位
1 → 1.6 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
RS庫存編號 121-6850
BrandRS PRO
HK$197.36
單位
1.6 → 2.5 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
RS庫存編號 331-3573
BrandRS PRO
HK$237.46
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 121-6857
BrandRS PRO
HK$288.71
單位
20 → 27 A 3 - 25 kA @ 230 V Screw 690 V Automatic 45mm 89.5mm 78.5mm 45 x 89.5 x 78.5 mm Motor Protection Switches MS32
RS庫存編號 331-3630
BrandRS PRO
HK$259.70
單位
2.4 → 4 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 331-3646
BrandRS PRO
HK$248.47
單位
4 → 6 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 121-6845
BrandRS PRO
HK$187.01
單位
0.16 → 0.25 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
RS庫存編號 121-6853
BrandRS PRO
HK$213.91
單位
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
RS庫存編號 331-3595
BrandRS PRO
HK$249.48
單位
0.6 → 1 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000
RS庫存編號 331-3652
BrandRS PRO
HK$284.12
單位
6 → 10 A - - - Screw 690 V - 80mm 45mm 73.5mm 80 x 45 x 73.5 mm MS25 Series XL2000