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Protection circuit 2 to prevent short circuit when starting the motor in reverse direction
Source: InternetPublisher:containsmachine Keywords: protection circuit motor short circuit Updated: 2021/02/28
An intermediate relay is added to this circuit, and its normally closed contact is connected in series to the forward and reverse contactor
KMi and KM2 coil circuits . If the contact arc is not extinguished during the forward and reverse conversion process, the intermediate relay KA will absorb
Close, cut off the conversion loop. Only after the arc is extinguished, KA is released and its normally closed contact is closed to connect the conversion circuit .
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