The replacement unit is in service since last Thursday and the voltages in Piha are fine now 235 / 408 volts.
We usually have 3 LA's at the incoming 3 phases (line side of the bypass ABS switch)
Then 2 LA's at the outgoing 2 phases (load side off regulator).
The 3 kV LA's are across the tapchanger (S and L terminals) of the regulator.
The one blown off above the regulator must have exploded when something internally went wrong (open circuit).
When the unit is detanked I will take a few piccies and will post these and let you know.
