2, voltage regulator is to make the output voltage stabilization equipment. Voltage regulator has a stabilized constant voltage, control circuit, and servo motor and other components. When the input voltage or load changes, the control circuit for sampling, comparison, amplification, and then drive the servo motor rotation, so that the position of the regulator carbon brushes to change, by automatically adjusting the coil turns ratio, so as to maintain the stability of the output voltage.
3, into the house line is from the meter to the indoor distribution box in the middle of the connection wire.