The step type voltage regulator takes an incoming voltage that will change with load settings and maintains a constant output voltage. The voltage will drop as the loading rises along the distribution feeder. This voltage drop decreases the amount of power used by the lighting portion of the load. By increasing the voltage to this lighting load, more power is used up. They control distribution line voltages from 10% increase (boost) to 10% lower (buck) in thirty-two steps of approximately 5/8% each. The 5/8% step voltage is now a typical industry standard. There is a full range from 2400 volts (60 kV BIL) to 34,500 volts (200 kV BIL) for 60 Hz and 50 Hz system voltages and current uses. These voltage regulators can be used in more than one system voltage due to internal potential winding taps and an external ratio correction transformer on all ratings. Smaller kVA sizes are provided with support lugs for pole mounting and with substation or platform tie-down provisions. Larger sizes are delivered with substation bases with pad-mounting provisions. Static controls and the microprocessor-based control panels keep the voltage within desired limits.