FAQ

Is it appropriate to connect the contactor at the output end of the frequency converter?

Is it appropriate to connect the contactor at the output end of the frequency converter?
key word: ac drive  
Generally, it is not recommended to connect the contactor at the output end of the frequency converter. 
If the contactor must be connected, the following criteria should be followed:
First, pull in the contactor first, and then start the frequency converter; 
Stop the machine, stop the frequency converter first, and then disconnect the contactor.  
It is absolutely not allowed to cut in or disconnect the contactor suddenly when the frequency converter is in operation, 
because this will cause huge impulse current, damage the frequency converter or motor,
and may lead to explosion in serious cases.