Current transformer uses:

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ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 3
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  1. Toroidal transformer
  2. Step-up transformer
  3. Centre-tap transformer
  4. Step-down transformer

Answer (Detailed Solution Below)

Option 2 : Step-up transformer
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Detailed Solution

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  • The current transformer uses step-up transformer.
  • The current transformer ( C.T. ), is a type of instrument transformer that is designed to produce an alternating current in its secondary winding which is proportional to the current being measured in its primary.
  • Current transformers reduce high voltage currents to a much lower value and provide a convenient way of safely monitoring the actual electrical current flowing in an AC transmission line using a standard ammeter.
  • By reducing current in the secondary side, C.T. also steps up the voltage on the secondary side.
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