Hawkins Electrical Guide v. 07 (of 10) / Questions, Answers, & Illustrations, A progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications

by N. Hawkins

Ques. What are the essential parts of a line drop compensator?

Ans. The elements of a line drop compensator are a variable resistance, and a variable inductance.

Ques. Describe the connections.

Ans. The secondary of a pressure transformer is connected in series with the compensator inductance and resistance, and the secondary of a current transformer as shown in the diagram, fig. 2,458.

Fig. 2,458—Diagram showing essential parts and connections for a line drop compensator. The compensator corrects the voltmeter indication at the supply end of a feeder for the ohmic and inductive drop in pressure between that point and the point of consumption, so that the reading of the station voltmeter corresponds with the actual voltage at the point of consumption, independent of the power factor and current. It is especially useful for adjusting pressure regulators.

Ques. How are the inductance and resistance wound?

Ans. They are wound so that any proportion of the winding of either can be put in or out of the voltmeter circuit.