Hagar rcbo’s in three phase board

[Daz7h]

It is quite possible that you have dameaged many single phase appliances
Without the N they can have 400v across them.

No damage to appliances only led high bays connected.

 

[Daz7h]

Loss of neutral to a property is a very real and dangerous thing.
And yes, things can go up in smoke.

Highlights the importance of safe isolation and testing before re energising

Safe isolation and testing wouldn’t work if the neutral fell from a power suppliers pole

 

[James]

Safe isolation and testing wouldn’t work if the neutral fell from a power suppliers pole

It happens quite often in rural locations, the local scrap metal thieves steal the N cable and the farm or farms end up with a fair amount of damaged equipment.

And in many situations, a loss of N would be picked up before re energising.
If I saw 3 to 4 hundred volts phase to N I would not be turning on the big red switch!

 

[Daz7h]

We weren’t re en

It happens quite often in rural locations, the local scrap metal thieves steal the N cable and the farm or farms end up with a fair amount of damaged equipment.

And in many situations, a loss of N would be picked up before re energising.
If I saw 3 to 4 hundred volts phase to N I would not be turning on the big red switch

It happens quite often in rural locations, the local scrap metal thieves steal the N cable and the farm or farms end up with a fair amount of damaged equipment.

And in many situations, a loss of N would be picked up before re energising.
If I saw 3 to 4 hundred volts phase to N I would not be turning on the big red switch!

This is in an islolated building, nothing was isolated as the only thing energised was led lighting which never failed. They stayed on so until finding the burning rcbo’s we never knew there was any fault.

 

[pc1966]

There is another thread like this when testing and things went "bang".

Wonder if the FE arrangement is partly to blame, but that is not what I understood them to do and when I IR tested some by mistake they survived 500V DC (without smoke) showning only a few hundred kOhm (from memory).