Bit of a mystery to me, any ideas? Fault on three phase Merlin Gerin

[Vortigern]

Anyway, sent pics today and spoke to Schneider tech. They are as stumped as me/us? But even so they are willing to take a look. When I put the new Hager Invicta board in I will send the actual bus bar chamber to them. But the tech guy said it is impossible, never heard of it there is nothing could go wrong and the first time he has ever heard of this, me too. Bit of a mystery then, maybe we will never know.

 

[Wilko]

Hi - sorry to hear of your troubles V !
I had a look at the pics and my 20p is something was vaporised in there, I can almost see it’s shadow, ha ha.

 

[ipf]

Pretty certain there was something in there that shouldn't have been there. Whether debris from installation that happened to move, or something that walked in there by itself. Probably something non-metallic if there's no localised splash anywhere on the bars. Unlikely to be surge-related on a submain, if nothing else in the installation is even slightly damaged.

Once had a 3ph board supply shorted by a slug. Holding onto a live bar connection and stretching out to reach the DB casing... we deduced.... it was splattered all over.

 

[Vortigern]

You might be on to something there. When I put in the invicta board I will relook at that @Wilko

 

[ipf]

Once had a 3ph board supply shorted by a slug. Holding onto a live bar connection and stretching out to reach the DB casing... we deduced.... it was splattered all over.

Found these.

 

[Vortigern]

Yukky!