A new voltage-regulating relay plus line-drop compensator

THERE are numerous applications where it is desired to measure a voltage at one point of a line or feeder by the use of an instrument placed at some other point. The instrument measures the voltage at the point of the line to which it is connected, and also measures the line drop to the remote point. These two measurements are combined so that the resultant indication is the voltage at the remote point of the feeder. If the instrument has contacts on it so that it may actuate control circuits, it is known as a voltage-regulating relay plus line-drop compensator. Such a device finds application ta regulating equipment such as tap-changing transformers, capacitor-switching schemes for power-factor control, and the like.