what is a voltage regulator at substation
V OLTAGE REGULATORSVS LOAD TAP CHANGERS As a means to regulate substation voltage, some utilities use a substation transformer with a Load Tap Changer (LTC)in one package. However, if one phase of the tap changer fails or requires maintenance, the entire unit is removedfrom service, affecting all three phases. OLTAGE REGULATORSVS LOAD TAP CHANGERS As a means to regulate substation voltage, some utilities use a substation transformer with a Load Tap Changer (LTC)in one package. However, if one phase of the tap changer fails or requires maintenance, the entire unit is removedfrom service, affecting all three phases.