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National College Credit Recommendation Service

Board of Regents  |  University of the State of New York

Consolidated Edison Company of New York, Inc. | Evaluated Learning Experience

Transformers and Tap Changer Operations (CSO-3030)

Formerly Transformers and Tap Changers [CS303-0]
Hellgate Training Center, 910 East 134th Street, Bronx, NY (through December 1992); The Learning Center, 43-82 Vernon Boulevard, Long Island City, NY (beginning January 1993).
Version 1: 40 hours (1 week); includes 8 hours of field exercises. Version 2: 40 hours (1 week); includes 16 hours of field exercises. Version 3: 40 hours (1 week); includes 8 hours of field exercises.
Version 1: April 1988 - January 2000. Version 2: February 2000 - November 2003. Version 3: December 2003 - Present.
Instructional delivery format: 
Traditional classroom model
Learner Outcomes: 

Version 1, 2, and 3: Upon successful completion of the course, students will be able to: describe the functions and principles of operation of transformers; solve simple turns ratio problems; explain the significance of MW, MVAR, MVA; describe the construction of transformer cores and windings; describe applications of WYE-WYE, WYE-DELTA and DELTA-DELTA transformer applications; explain tap changer function, operation and use; explain the function of voltage regulators; interpret transformer nameplate information; describe tap changer components and their functions; describe the construction, function and operating principles of phase angle regulators; describe the application and operation of station light and power transformers, and grounding transformers; describe the construction, operating principles and applications of three winding transformers; explain the function and operating principles of series and shunt reactors; describe transformer inspection procedures; and describe transformer alarms; and describe operator response to various alarms.


Version 1, 2, and 3: Major topics include: transformer construction; turns ratio; MW, MVAR, MVA; transformer connections; tap changers; transformer nameplates; voltage regulators; phase angle regulators; station light and power transformers; grounding transformers; three winding transformers; reactors; transformer inspection; transformer alarms; and operator reaction to transformer alarms.

Credit recommendation: 

Version 1, 2, and 3: In the lower division baccalaureate/associate degree category, 1 semester hour in Electrical Power Technology or Industrial Technology (4/91) (5/96 revalidation) (8/01 revalidation) (8/06 revalidation) (3/16 revalidation).