Page 205 - Basic Electrical Engineering

equivalent star, the circuit is simplified and solution of the circuit becomes
very easy. This process of transformation of a delta to star and simplication
of the solution of the problem is illustrated in Fig. 2.121.

Figure 2.121

It can be seen from Fig. 2.121 (a) and (b) that between terminals B, C, and

E three resistances of 3 Ω each are forming a delta. This delta is converted
into an equivalent star between the same terminals replacing the 3 Ω

resistances by equivalent 1 Ω resistances as shown in Fig. 2.121 (c). The
equivalence of delta into star will be discussed a little later. By just one

transformation of delta-forming resistances into star-forming resistances, the
circuit is simplified and the total resistance across the battery terminals AG

becomes 6 Ω, and hence the battery current is calculated as shown in Fig.