Automatic on load transformer tap changer
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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

automatic on load transformer tap changer

By.

Uren Thummar Heema Dave

Abhishek Joshi Shruti Ghetiya


Introduction
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
Basic Block Diagram

Transformer

SCR loop 1

LOAD

AC

SCR loop 2

AC supply

SCR loop 3

Feedback

Tapping

Firing Pulse

μC

Frequency


Advantages
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.



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