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Electrical Technology, Volume 1 by S. P. Bali

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25

Delta ⇌ Wye Transformations

OBJECTIVES

In this chapter you will learn about:

  • Appreciate the concept behind delta and Y connections
  • How to convert from Δ to Y
  • How to convert from Y to Δ
  • How to solve simple problem using these conversions
  • Simplify complicated networks by using these conversions
equation

Delta ⇌ Wye Transformations

25.1  INTRODUCTION

Three impedances connected nose-to-tail, as shown in Figure 25.1, are said to be delta (Δ) or mesh connected, because they form a mesh.

Three impedances connected together to a common point, as shown in Figure 25.2, are said to be star (or Y) connected.

If their nodes (1, 2 and 3)—to which the two ...

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