Question
Download Solution PDFThe most familiar application of zigzag transformer is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFZIgZag Transformer:
- A zigzag transformer is a special-purpose transformer with a zigzag or interconnected star or delta connected winding connection, such that each output is the vector sum of the other two phases displaced by 120°
- The connection diagram of the star and delta connected zigzag transformer is given below:
Advantages of zigzag transformer:
- Less costly for grounding purposes.
- The zigzag connection in power systems traps triple harmonic (3rd, 9th, 15th, etc.) currents.
- Ground current isolation.
- No phase displacement.
Applications of zigzag transformer:
- Installing a zigzag transformer near the secondary side of the transformer provides the required earth reference point.
- It acts as a ground reference on an ungrounded system.
- It can act as a grounding transformer where conventional transformers are not effective.
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