Electrical Technology, Vol2: Machines and Measurements, 1/e

36

Transformers — Single Phase

OBJECTIVES

In this chapter you will learn about:

• Mutual inductance and methods of controlling mutual inductance
• Dot convention and its significance
• Transformer types and construction of transformers (single-phase only)
• Current and voltage relations in an ideal transformer
• General transformer equation and simple problems involving it
• Practical transformer and circuit relations
• Transformer ratings and connected problems
• Impedance transformation in transformers–transformation ratio
• Step-up and step-down autotransformers
• Transformer equivalent circuit—referred to primary and secondary
• Transformer regulation; open circuit test and short-circuit test
• Pulse transformers, power transformers and instrumentation transformers ...