POLY PHASE A C CIRCUITS CHAPTER 7 CONTENTS
- Slides: 18
POLY PHASE A. C. CIRCUITS CHAPTER 7
CONTENTS 1. Generation of Poly phase Voltages, Phase Sequence 2. Star or Wave (Y) connection - Values of Phase currents, Voltages in star and delta connection
Polyphase System • Phase means branch, circuit or winding while poly means many. • So such applications need a supply having many a. c voltages present in it simultaneously. • Such a system is called polyphase system.
Generation of Single phase voltage system
Generation of Three phase voltage system
Three Phase Alternator
Generation of Three phase voltage system
Generation of Three phase voltage system
Phase Sequence The sequence in which the voltages in three phases reach their maximum positive values is called Phase Sequence. Generally the phase sequence is R-Y-B.
Line Voltage & Line Current The potential difference between any two lines of supply is called LINE VOLTAGE and current passing through any line is called LINE CURRENT.
Line Voltage & Line Current In Star connection
Line Voltage & Line Current In Delta connection
Phase Voltage & Phase Current The potential difference between any line and neutral of supply is called PHASE VOLTAGE and current passing through any phase is called PHASE CURRENT.
Phase Voltage & Phase Current
Phase Voltage & Phase Current
END