Page 216 - Basic Electrical Engineering
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This network is further simplified as
Figure 2.134
The students are advised to solve this problem by converting the three
resistances forming star point at N into an equivalent delta touching points A,
B, and C and then solve by considering series parallel connections and arrive
at the same value of R AB .
Example 2.39 Using star–delta transformations calculate the equivalent
resistance of the network between terminals A and B. All resistances in Fig.
2.135 are in Ohms.