Fault analysis of fan motor terminals, see figure
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The image is as follows: Please, experts, analyze the reasons and advise on what measures should be taken now
It’s probably because the wire ends aren’t pressed tightly or because the motor vibrates too much. The cable ends should be flattened and tinned first before installation, or installed using crimp terminals
Without a insulating nose, the exposed copper wires oxidize due to the heat generated by electric current, which increases the resistance and leads to more heating. This in turn causes further oxidation and even more heating, until eventually the components overheat and get damaged. .
Installing it this way is not in compliance with standards; at the very least, copper connectors should be used
I’m wondering why two wires are connected to the protective ground of your motor casing – did you connect the neutral wire as well?
Also, if you are performing soft starting from the outside, your wiring is incorrect as well; the terminals inside the motor should not be connected to the connection blocks
The cable ends should be flattened and tinned first before installation, or installed using crimp terminals
I’m just asking gently, what the hell is this?
This post was last edited by hxlhb on 2017-3-9 09:27. Original poster: Do all three fans or just the two have the same problem?
First flatten the cable end and tin it, then install it or use a crimp terminal for installation