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Induction cup relay is operated due to changes in

  • The induction cup relay operates due to changes in both current and voltage.
  • The induction cup relay is a type of induction disc relay that operates based on the principles of electromagnetic induction.
  • It consists of a cylindrical metal cup and a coil wound on a laminated iron core.
  • The coil generates a magnetic field that induces eddy currents in the cup when there is a fault in the protected circuit.
  • The eddy currents generate their own magnetic field that interacts with the magnetic field of the coil, causing the relay to operate.
  • The operation of the induction cup relay is based on the combination of changes in both current and voltage.
  • The magnetic field generated by the coil is proportional to the current flowing through it, while the eddy currents induced in the cup are proportional to the voltage across it.