Alternate current contactor auxiliary element capable for large starting pressure breakdown
A technology of AC contactors and auxiliary components, applied in electrical components, relays, circuits, etc., can solve the problem that three-phase AC contactors cannot be widely used in occasions with large starting voltage drop, and achieve the effect of saving electric energy
Inactive Publication Date: 2010-03-24
赵庚
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Problems solved by technology
[0003] In order to solve the technical problem that existing three-phase AC contactors cannot be widely used in occasions with large starting voltage drop, the purpose of this invention is to provide an AC contactor auxiliary component suitable for use with large starting voltage drop
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[0008] see figure 1 and figure 2 , the present invention is connected to the AC contactor CJ1, and its structural feature is: the power supply output terminals L4 black, L5 of the wire bag suction bridge rectifier filter circuit formed by connecting five diodes D1, D2, D3, D4, D5, and C3 The red is respectively connected to both ends of the line package CJ1 of the three-phase AC contactor, the input terminal L1 of the current limiting circuit of the capacitor C1 and C2 is connected to the first end of the auxiliary normally closed contact CJ1-4 of the three-phase AC contactor CJ1, and the line One power supply input terminal including suction bridge rectification filter circuit is connected to the end of auxiliary normally closed contact CJ1-4 of three-phase AC contactor CJ1 through L2 white of R1. The other power input terminal L3 of the wire-wrap pull-in bridge rectifier filter circuit is connected to the end of the auxiliary normally open contact CJ1-5 of the three-phase ...
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The invention relates to an alternate current contactor auxiliary element capable for large starting pressure breakdown aiming to solve the problem that the mining enterprise always extends along theroadway, the circuit is too long to cause the situation that the alternate current contactor can not suck normally due to large starting pressure breakdown. The auxiliary element comprises a diode bridge rectification circuit, a capacitance filtering circuit, a capacitance limiting circuit and an electric resistance protection circuit which are led out and connected with five color separation wires. The alternate current contactor auxiliary element is suitable for large starting pressure breakdown. When in use, five color separation wires are separately connected with the power source, a button and a coil, therefore the alternate current feeding way is changed to the direct current feeding way, in the moment of starting sucking, large power is output to suck small power for long time, electricity can be saved and stable sucking of the alternate current contactor can be ensured when the starting pressure breakdown is more than 70%. Owning to the stable sucking, the alternate current contactor of the invention is applicable to all conditions.
Description
Technical field [0001] The invention relates to an auxiliary component which must be supplemented specially for using an AC contactor in a place far away from a power supply transformer. Background technique [0002] Existing electric switches that supply power to electrical equipment such as motors generally use three-phase AC contactors, but because the power supply transformer is not large enough and the power supply line is long, especially the extension line of the mining enterprise along with the mine road is very long, resulting in line failure. Voltage drop and starting voltage drop, the starting voltage drop is greater than 25% at the moment of starting, resulting in the AC contactor not being able to pull in normally, but in a shaking state that seems to be sucking but not sucking, which will inevitably affect electrical equipment such as motors It cannot work reliably or shorten the service life of electrical equipment and AC contactors, which is the fundamental r...
Claims
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IPC IPC(8): H01H47/04
Inventor赵庚
Owner赵庚