Section V:  Sequence Circuits for Transformers

• Y-Y Connected Transformer
• Δ - Δ Connected Transformer
• Y- Δ Connected Transformer

In this section we shall discuss the sequence circuits of transformers. As we have seen earlier that the sequence circuits are different for Y- and Δ -connected loads, the sequence circuits are also different for Y and Δ connected transformers. We shall therefore treat different transformer connections separately.