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What is the difference between AC contactor or DC contactor?
PUBLISHER:Shanghai Moye Electric Co.,Ltd¡¡RELEASE TIME:2017/7/13
Difference£º
Not the same as the 1 Core: the core of AC contactor with silicon steel sheet laminated insulated from each other and pressed, and a double E shaped iron core; DC contactor by block for U shape made of soft iron;
2 ¡¢ arc extinguishing system is not the same: AC contactor uses chip to extinguish arc, and DC contactor uses magnetic blow out arc device.
3, the number of turns of the coil is not the same: AC contactor coil turns into alternating current is less, and the DC contactor coil number of turns into a DC, AC contactor broken is AC circuits, DC contactor breaker is DC circuit. AC contactors operate at a maximum frequency of 600 times per hour,
The utility model has the advantages of low cost, and direct current contactor operation frequency up to 2000 times per hour, and the use cost is high
Why can't they be interchanged?:
1, AC contactor in emergency can substitute the DC contactor, pick-up time cannot exceed 2 hours (because of heat dissipation than the DC AC coil, which is decided by their different structures), really long time to use the best AC coil is connected in series with a resistor, in turn, direct current cannot substitute for AC contactor
2, AC contactor coil number, DC contactor coil number, from the size of the coil can distinguish too much for the current of main circuit (Ie>250A) under the condition of the contactor coil in series double winding coil DC relay reactance, small current. If the AC adapter is not damaged, when put together. However, the reactance of the coil of the AC relay is small and the current is too great. If it is connected to the direct current, it will damage the coil.
The number of turns of the coil 4, AC contactor, small resistance, when the coil into alternating current, will produce a large inductance, the inductance coil resistance is far greater than the excitation current of the coil inductance depends mainly on the size of. If the DC current is passed in, the coil becomes a purely resistive load, and the current flowing through the coil will be very large, causing the coil to heat up and even burn out. Therefore, the AC contactor can not be used as a DC contactor.
Not the same as the 1 Core: the core of AC contactor with silicon steel sheet laminated insulated from each other and pressed, and a double E shaped iron core; DC contactor by block for U shape made of soft iron;
2 ¡¢ arc extinguishing system is not the same: AC contactor uses chip to extinguish arc, and DC contactor uses magnetic blow out arc device.
3, the number of turns of the coil is not the same: AC contactor coil turns into alternating current is less, and the DC contactor coil number of turns into a DC, AC contactor broken is AC circuits, DC contactor breaker is DC circuit. AC contactors operate at a maximum frequency of 600 times per hour,
The utility model has the advantages of low cost, and direct current contactor operation frequency up to 2000 times per hour, and the use cost is high
Why can't they be interchanged?:
1, AC contactor in emergency can substitute the DC contactor, pick-up time cannot exceed 2 hours (because of heat dissipation than the DC AC coil, which is decided by their different structures), really long time to use the best AC coil is connected in series with a resistor, in turn, direct current cannot substitute for AC contactor
2, AC contactor coil number, DC contactor coil number, from the size of the coil can distinguish too much for the current of main circuit (Ie>250A) under the condition of the contactor coil in series double winding coil DC relay reactance, small current. If the AC adapter is not damaged, when put together. However, the reactance of the coil of the AC relay is small and the current is too great. If it is connected to the direct current, it will damage the coil.
The number of turns of the coil 4, AC contactor, small resistance, when the coil into alternating current, will produce a large inductance, the inductance coil resistance is far greater than the excitation current of the coil inductance depends mainly on the size of. If the DC current is passed in, the coil becomes a purely resistive load, and the current flowing through the coil will be very large, causing the coil to heat up and even burn out. Therefore, the AC contactor can not be used as a DC contactor.