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Technical Document Reader

**Document**

104-113

**Name**

Turns Ratio

**Description**

An explanation of Turns Ratio and several methods to obtain best measurements.

1 Introduction |

2 Basic Theory |

3 Factors Affecting Turns Ratio Measurements |

4 Types of Turns Ratio Tests |

5 Choosing the Correct Turns Ratio Test |

6 Conclusion |

# TURNS RATIO

## Introduction

Transformers are used in a wide array of electrical or electronic applications, providing functions that range from isolation and stepping up or stepping down voltage and current to noise rejection, signal measurement, regulation and a host of functions particular to specific applications.

In order to test that a transformer will meet its design specification, a number of functions should be tested and one of the most commonly used tests is turns ratio.

This technical note will review briefly the basic theory of turns ratio and then introduce some additional issues that should be considered when testing this critical transformer characteristic.