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automatic on load transformer tap changer. By. Uren Thummar Heema Dave Abhishek Joshi Shruti Ghetiya. Introduction.
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automatic on load transformer tap changer By. Uren Thummar Heema Dave Abhishek Joshi Shruti Ghetiya
Introduction • In conventions on Load Transformer Tap Changer there is production of Arc when changing the tapping of Transformer. And in large KVA rating of Transformer it is hard to quench the Arc. This major problem can solve in this thyristor based transformer tap changer. • A single phase on Load Transformer Tap Changer is a basically A.C. Voltage Controller. Which uses anti-parallel loop of Thyristors.
Basic Block Diagram Transformer SCR loop 1 LOAD AC SCR loop 2 AC supply SCR loop 3 Feedback Tapping Firing Pulse μC Frequency
Advantages • Due to the use of thyristors as switches, the changeover is fast. • Operation and changeover is smooth. • It avoids sparking while changing over. • It reduces size of OLTC.
