General Purpose LTC Transformer Control or Replaces Westinghouse SVC

and SVR Controls

• Adaptable to any LTC Transformer – old or new

• Meets ANSI Class 1 (1%) Accuracy Requirement

• Now in Use by Leading Manufacturers as Standard Equipment

Features

Line Drop Compensation, Non-Sequential and Sequential modes of operation, and manual voltage adjustment

capability is included.

Inputs

Power: A two wire input, requiring less than 3 W at 90 to 140 Vac, provides all power requirements. The unit

should be powered from a potential transformer or from the voltage to be controlled.

Line Current: Line drop compensation is provided by a CT input with a 0.2 A nominal full scale rating. The

burden imposed by this input on the current source is 0.03 VA. A Beckwith Electric model M-0121 (5 A to

0.2 A) or M-0169 (5 A or 8.66 A to 0.2 A) Auxiliary Current Transformer is available when required.

Circulating Current: Parallel operation of transformers is provided by a second CT input with a 0.2 A nominal

full scale rating. The burden imposed by this input on the current source is 0.005 VA. A paralleling input with

a 0.2 A full scale rating gives approximately 24 V correction at approximately 90° for parallel operation with

other transformers.