A 138KV CCVT was replaced and the CCVT was to be energized with no load while in service checks were done.
Basically the procedures call to use a 7.5W light bulb in series with the fluke. One lead to the neutral test switch and the other lead from the fluke to the light bulb to the A phase...
I'm tasked with visually explaining the connection change between an existing 30 degree lagging transformer to a new 330 degree lagging or (30 degree leading) transformer. Both transformers are Delta- Wye.
Instructions read: Draw and label the voltage vector diagram including the high and low...
