Fig. 2,416.—Diagram of induction regulator lowering the voltage 10%. The diagram shows the regulator lowering the feeder pressure to 1,980 volts with an increase of the secondary current to 111 amperes, the additional 11 amperes flowing from the feeder, through the primary back to the feeder.
Ques. Name two types of pressure regulator.
Ans. The induction regulator, and the variable ratio transformer regulator.
Ques. Of what does an induction regulator consist?
Ans. It consists of a primary winding or exciting coil, a secondary winding which carries the entire load current.
Fig. 2,417.—Moving element or primary of Westinghouse motor operated single phase induction regulator. It consists of a core of punchings built up directly on the primary shaft and carrying the primary winding, which is divided into four coils. The primary coils are machine wound and the layers of the winding are separated from each other by heavy insulating material in addition to the cotton covering of the inductors. The complete coils are insulated and impregnated with insulating compound before being placed in the slots. The coils are held in position by fibre wedges.
The primary is wound for the full transmission voltage, and is connected across the line, while the secondary is connected in series with the line.