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, at the end of the transmission.

1000s of diagram techniques exist.

Other non-symmetrical systems have been used.

Terminology [ ] The between a and a are called lines, and the between any two lines is called line voltage.

The connections are arranged so that, as far as possible in each group, equal power is drawn from each phase.

1 Introduction In this chapter, we will begin to analyze three-phase circuits.

Two sources of three-phase power must not be connected in parallel unless they have the same phase sequence, for example, when connecting a generator to an energized distribution network or when connecting two transformers in parallel.

A three-phase generator can be driven by a single-phase motor.

Balanced circuits [ ] In the perfectly balanced case all three lines share equivalent loads.