Answered: Safety considerations require that the…

Safety considerations require that the CT has to be short circuited (or the primary circuit switched off) during a replacement of the ammeter. Explain why this is needed.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter16: Installation Of Heating, Cooling, And Refrigeration Systems

Section: Chapter Questions

Problem 13RQ

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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

Consider a 5A ammeter is connected to the secondary side of a 100/5A current transformer (CT) in order to measure the current of the circuit. Safety considerations require that the CT has to be short circuited (or the primary circuit switched off) during a replacement of the ammeter. Explain why this is needed.

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