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The burden of a current transformer is

  • A.the current drawn by its primary winding from the system being measured
  • B.the loss dissipated in its own core and windings during operation
  • C.the ratio of the secondary voltage to the secondary current at rated load
  • D.the impedance connected across its secondary

Answer: D

It is quoted either as an impedance in ohms or as a volt-ampere rating at rated secondary current, and it comprises the instruments, relays and the connecting leads. The error of the transformer depends on the burden, so a class is meaningless without one.

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