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Selection of AC contactorDate：2018-03-12 14:41:35 Browse：722
(1)According to the contactor is control object, the number of operation and the use category, the contactor of the corresponding category is selected.
(2)Select the rated voltage of the line at the position of use.
(3) The rated current of the main contact of the contactor is selected according to the load capacity.
(4) The requirements of controlling the power supply should be taken into consideration for the type of voltage and current of the attracting coil.
(5)For the auxiliary contact capacity choice, should be considered according to the number of interlocking circuit requirements and connecting contact breaking current size.
(6)For the contactor is switched on and switched off ability, selection should pay attention to load some use categories, such as lighting capacitors, tungsten lamp, high current value when it turns on and off time is longer, the choice should be left margin.
(7)The problem for the electrical life and mechanical life of the contactor, by the use of life known per hour the average number of operations and machines, calculating the electric life need, if can not meet the requirements should be reduced to allow the use of.
(8)The selection should consider the environmental temperature, humidity, vibration, dust, use place chemical corrosion, should according to the corresponding environment with different types of contactor.
(9)For lighting device for a contactor, should also consider the starting time and long term working current type, lighting device size, the starting current, electrical equipment selection should be no more than the current contactor (line ninety percent) rated current. For tungsten filament lamps and lighting devices with capacitance compensation, the current value should be considered.
(10)The design should consider the consistency of the one or two device action.
(2)Select the rated voltage of the line at the position of use.
(3) The rated current of the main contact of the contactor is selected according to the load capacity.
(4) The requirements of controlling the power supply should be taken into consideration for the type of voltage and current of the attracting coil.
(5)For the auxiliary contact capacity choice, should be considered according to the number of interlocking circuit requirements and connecting contact breaking current size.
(6)For the contactor is switched on and switched off ability, selection should pay attention to load some use categories, such as lighting capacitors, tungsten lamp, high current value when it turns on and off time is longer, the choice should be left margin.
(7)The problem for the electrical life and mechanical life of the contactor, by the use of life known per hour the average number of operations and machines, calculating the electric life need, if can not meet the requirements should be reduced to allow the use of.
(8)The selection should consider the environmental temperature, humidity, vibration, dust, use place chemical corrosion, should according to the corresponding environment with different types of contactor.
(9)For lighting device for a contactor, should also consider the starting time and long term working current type, lighting device size, the starting current, electrical equipment selection should be no more than the current contactor (line ninety percent) rated current. For tungsten filament lamps and lighting devices with capacitance compensation, the current value should be considered.
(10)The design should consider the consistency of the one or two device action.
ADD：Economic & Technology Development zone,Yangquan,Shanxi,China. Record number: Jin ICP, number 16006010 Technical support：longcai0353