Maricopa Community Colleges  ELA259   19936-20046 
Official Course Description: MCCCD Approval: 05/25/93
ELA259 19936-20046 LEC 1 Credit(s) 1 Period(s)
Distribution Transformers
Basic principles and concepts of distribution transformers. Explains how distribution transformers work, the different connections used with transformers, and how to determine specific connections for different types of transformers. Includes safe use of equipmment. Prerequisites: Indentured apprentice status with the Phoenix Electrical Joint Apprenticeship and Training Committee or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ELA259   19936-20046 Distribution Transformers
1. State the purpose of a transformer. (I)
2. Identify the different components of a transformer. (I)
3. Describe how induction operates in a transformer. (I)
4. Explain the different types of distribution systems. (II)
5. Identify voltage ratings on given transformers and explain the significance of the ratings. (III)
6. Determine polarity of different transformers and explain the significance of polarity. (IV)
7. State the different types of connections used in the industry and describe the special characteristics of each. (V-VI)
8. Determine the type of connection used on a given transformer. (V-VI)
9. Determine the connection needed to produce a desired voltage, given a specified voltage rating and a specific transformer. (V-VI)
10. Name major types of protection needed for transformers. (VII)
11. Determine fuse size for a given transformer size (KVA). (VII)
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MCCCD Official Course Outline:
 
ELA259   19936-20046 Distribution Transformers
    I. Transformer operation
        A. Purpose
        B. Components
        C. Induction
      II. Distribution systems
          A. Types
          B. Voltages
        III. Transformer voltage rating
          IV. Transformer polarity
              A. Additive
              B. Subtractive
            V. Transformer connections (single phase)
                A. Primary
                B. Secondary
              VI. Transformer connections (three phase)
                  A. Primary
                  B. Secondary
                  C. Connection applications
                VII. Transformer protection
                    A. KVA ratings
                    B. Overload
                    C. Overvoltage protection
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