This is a new installation from the Eskom transformer to the 90 KW Diaken chiller screw compressor type
Eskom transformer : 500 kva , 22kv, 415 volts .
HV side Delta , LV side Star .
Make and model unknown of transformer
Supply voltage on LV side of Transformer : 400 , 399 , 400 . 230 , 230 , 230 .
The problem I have is that on line 2 the amperage is out by 20 amps when I am connected to eskom supply , when I switch over the the genset , 300 kva
the amperage imbalance is gone . Got eskom out to redo lose connections at the metering box hoping to resolve problem . Still the same fault , they then put a second transformer in place which was faulty .Without load on the LV side the transformer blew all the HV fuses on the line .Why not megger , I ask ? To test is to know. Anyway the old transformer is now back with the same problem happening.
Distance between genset and load the same as transformer and load
Voltage on genset and voltage on transformer : same
The load is 3 phase without a neutral and there is no single phase equipment that can cause that amp imbalance on line 2
Eskom supply on : volts correct amps are out
Genset supply on : volts correct amps correct
Anybody with ideas ?
Eskom , any ideas ?
This has gone on for a month now ..