Before taking insulation resistance readings of generator windings the automatic voltage regulators should be isolated and all semiconductor short circuited or disconnected in order to_______.
A.
. prevent charging of capacitive components within the automatic voltage regulator causing false regulation when generator restarts
B.
. prevent operation of automatic voltage regulator during insulation testing
C.
prevent damage to sensitive electronic components from high voltage tester
D.
protect insulation resistance tester from being damaged