Respuesta :

Potential relays measure the back emf developed across the start winding to operate the relay.

What is Potential:

  • the quantity determining the energy of mass in a gravitational field or of charge in an electric field.

Potential relays are used with single-phase capacitor, which need relatively high starting torque.

Their main function is to assist in starting the motor.

When power is applied to the coil, the contact(s) change position.

A relay with power applied to the coil is said to be energized.

Back EMF is the system in the coil of an electric motor that opposes the current flowing through the coil, when the armature rotates.

so here,

Potential relays measure the back emf developed across the start winding to operate the relay.

Learn more about Potential here:

https://brainly.com/question/4305583

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