I am working with a utility who has a very unique system. This portion of the system is 21kV. The 21kV apparently comes from the delta tertiary from an 18/24/30 MVA (230/60/21kV) transformer. They pick-up their ground reference from a 3-phase zig-zag 500kVA (21kV) grounding transformer. From...
What about if the tx has an H0 bushing and a full sized neutral was raised to an overhead switch (ie the riser pole). Is there anything wrong with switching the neutral at the riser during energization?
Referring to thread238-431498. Can anyone tell me if their utility has a method of temporarily grounding a 3-phase wye-delta pad-mount transformer other than using an H0 bushing well? Also, I have heard of utilities only offering the 208Y/120 or 480Y/277 secondary variety from their pad-mounted...
