Docreate-705 spot welder/how to protect it

Y

YuriyS

1 µW
Joined
Nov 10, 2024
Messages
1
Location
Mordor, near Japan
Hello!
I got Docreate-705 spot welder. There are no protections on this welding machine.
I got this picture on an oscilloscope.

View attachment 361719

How to protect this welding machine from forward and reverse induction spikes?
 

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