What is the purpose of a potential relay?

Potential or “voltage” relays are used with single-phase capacitor-start/capacitor-run motors, which need relatively high starting torque. Their main function is to assist in starting the motor. Potential starting relays consist of a high resistance coil and a set of normally closed contacts.Click to see full answer. Likewise, people ask, how does a potential relay operate?A potential relay senses voltage across the start winding. When this voltage reaches a sufficient level, the start capacitor, which is in series with the start winding, must be disconnected from the circuit. When a capacitor start motor runs, a voltage is induced in the start winding.Additionally, what is the difference between a relay and a potential relay? Potential relays (relays are used, as a rule, high-torque capacitor-start the engines. They slightly resemble the current relay. However, these relay is based on the increase in voltage. The increase comes as a device approaches and reaches its rated speed. Keeping this in consideration, how do you check a potential relay? Disconnect the voltage source from the circuit and remove the relay from the circuit. First check the relay’s coil by placing the leads of the ohmmeter across the 2 and 5 terminals of the relay. If the ohmmeter reads a high resistance (approximately 3,000 to 18,000 ohms) the coil of the relay is electrically OK.How is a potential relay energized?The potential relay consists of a very high-resistance coil and a set of normally closed contacts. When power is delivered to a single-phase motor, both the run and start windings will be energized because the contacts between terminals 1 and 2 of the potential relay are normally closed.