C
Crosswire
Was called to look at a 3phase 400/110v 10KVA transformer on a building site. The workers had been complaining their power tools ran slow.
Found 230v on all 3 phases and 400v between all phases.
Transformer output was 55v between phases. Healthy transformer on floor above, (which was on same feed) showed 110v between phases.
Found another transformer and swopped it over. Problem remained.
Now, either I've swopped one faulty transformer for a second faulty transformer, or their is another problem..
What would cause a transformer to output , only 55v between phases and not 110v?
All ideas appreciated
Found 230v on all 3 phases and 400v between all phases.
Transformer output was 55v between phases. Healthy transformer on floor above, (which was on same feed) showed 110v between phases.
Found another transformer and swopped it over. Problem remained.
Now, either I've swopped one faulty transformer for a second faulty transformer, or their is another problem..
What would cause a transformer to output , only 55v between phases and not 110v?
All ideas appreciated