Electro Mechanical Type Over Voltage Relay Study Trainer

This test set-up consists of a. Electromechanical over voltage-relay. b. Relay test setup with meter.

a. Electromechanical over voltage-relay

• One electromechanical type over voltage relay
   - Make: Megawin
   - Voltage setting multiplier (121V, 132, 143, 154, 165, 176, 187V)
   - Time setting multiplier.
   - One “NO” contact @ 220V, 10Amp rating.
   - One “NC” contact @ 220V, 10Amp rating.

b. Relay test setup with meter

• One 0-300V, 1AMP variable AC source provided for relay coil.
• One auto transformer provided for AC voltage adjustment.
• One illuminated rocker switch provided for power ON/OFF.
• One digital voltmeter used to indicate applied voltage.
• One digital timer provided for relay tripping time measurement.
• One automatic relay tripping time measurement circuit.
• One start/stop push-to on switch provided for time measurement circuit.
• One reset switch provided for timer reset.