Oxford RT180 stopped

[M.G.]

Oxford RT (single phase) was working great for years, then for no apparent reason melted the blue plug.
I replaced the blue plug and ever since it trips the main fuse in the house. I have tried a new lead and the welder isn’t even switched on at the machine but it trips the main fuse every time. Can someone please tell me how i can fix this?? Thank you

 

[oldbikedavey]

Sounds a bit like something iffy in the machine switch, perhaps ?

 

[zzr1200]

Time to check the mains insulators in the welder lid, I'd remove the bolts holding the lid on and pull the transformer out of the case, sounds like a dead short which is unusual for an Oxford oil cooled. Unless something has come loose inside and dropped causing a short.

 

[Pigeon_Droppings2]

If it melted the original plug then it's possible the mains lead was also damaged.

I had that happen on a power washer....spent a long time trying to trace faults before I disconnected the mains lead and it tested as shouted even when nothing was connected!

 

[zzr1200]

I have tried a new lead and the welder isn’t even switched on at the machine but it trips the main fuse every time.

The lead you replace was it an extension lead or the mains supply cable wired into the small box on top of the welder?

 

[brightspark]

Oxford RT (single phase) was working great for years, then for no apparent reason melted the blue plug.
I replaced the blue plug and ever since it trips the main fuse in the house. I have tried a new lead and the welder isn’t even switched on at the machine but it trips the main fuse every time. Can someone please tell me how i can fix this?? Thank you

what size is the breaker that trips my 180 takes the 30 amp mcb out just plugging in .its a b type im 2 lasy to put a c type in that will take the inrush current a 110v transformer normaly takes it out as well