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The pure inductive circuit takes power (reactive) from the AC line when

  • The pure inductive circuit takes power (reactive) from the AC line when applied voltage decreases but current Increases.
  • When an AC voltage is applied to a pure inductive circuit, the current through the circuit increases as the voltage reaches its maximum value and then decreases as the voltage reaches its minimum value.
  • The rate of change of current is proportional to the voltage applied to the circuit.
  • During the part of the AC cycle when the voltage is decreasing, the current continues to flow in the same direction due to the energy stored in the magnetic field of the inductor.
  • Since the current is still increasing during this part of the cycle, the circuit is still absorbing reactive power (i.e., power that is not dissipated in the form of heat).