Which type of transformer is used for stepping down current for measurement purposes?

Question

Question

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RRB JE EE 22 Apr 2025 Shift 2 CBT 2 Official Paper

Answer 1

The correct answer is option 2.

Different types of transformers

Current transformer: A current transformer (CT) is used to step down current for measurement purposes. It is a specific type of instrument transformer designed to reduce high currents to a lower, more manageable level that can be safely and accurately measured by standard electrical instruments.
Power transformer: A power transformer is a fixed device that converts power from one circuit to another without changing the frequency.
Auto transformer: Autotransformers are ideal for voltage adjustment for commercial and industrial machines. They provide an efficient, low cost way of serving the proper voltage to motors and compressors, lathes, CNC machines, and other industrial equipment requiring a step up or down from a building's service voltage.
Voltage transformer: Voltage transformers (VT), also called potential transformers (PT), are a parallel-connected type of instrument transformer. They are designed to present a negligible load to the supply being measured and have an accurate voltage ratio and phase relationship to enable accurate secondary connected metering.