Electrical Components - Pearson

564 Electrical Components UNIT 36 OBJECTIVES After completing this unit, you will be able to: 1. determine the resistance value of a color-banded fixed resistor. 2. provide examples of where and how transformers are used. 3. identify paper and film, electrolytic, ceramic , and mica capacitors. 4. identify the different types of thermostats. 5. explain cut-in, cut-out, and differential on pressure switches. 6. test transformers, capacitors, contactors, and relays. 7. list the different types of fuses and overloads. 8. explain the difference between relay logic and solid-state logic. 9. describe how a silicon rectifier operates. INTRODUCTION Most HVACR service work deals with Electrical problems. These problems can be caused by component failure, im-proper installation, or misuse. It is therefore important that HVACR technicians have a thorough and complete under-standing of Electrical Components and wiring diagrams.

Disc ceramic capacitors are commonly found on electronic circuit boards and are typically 0.1 microfarads (mfd) or less ( Figure 36-6 ). Mica capacitors are limited to even lower values than this ( Figure 36-7 ). For larger-capacitance requirements, paper and film

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  Ceramic, Disc, Ceramic disc

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