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Individual capacitor compensation at each motor is preferred to a central bank when

  • A.the number of motors on the site is very large
  • B.the cables to the motors are long and heavily loaded
  • C.the site's load varies widely through the day
  • D.the supply already contains appreciable harmonic distortion

Answer: B

Correcting at the load relieves the whole cable run of the reactive current, which a central bank at the incoming panel cannot do. Its drawbacks are cost, the need to switch with the motor and the risk of self-excitation on a coasting machine.

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