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Which adjustment of an energy meter is made at rated current and unity power factor?

  • A.the overload compensation
  • B.the braking magnet position
  • C.the lag adjustment
  • D.the light-load adjustment

Answer: B

The full-load speed is set first with the braking magnet at rated current and unity power factor, because everything else is a correction to it. The lag adjustment follows at 0.5 power factor and the friction adjustment at about five per cent of rated current.

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