1.Explain with the aid of a sketch the action of a three-phase DOL starter. What are dashpots used for? How are remote start and stop buttons connected? 2. A 10 kW, 240 V, 50 Hz single-phase cage...

1.Explain with the aid of a sketch the action of a three-phase DOL starter. What are dashpots used for? How are remote start and stop buttons connected? 2. A 10 kW, 240 V, 50 Hz single-phase cage rotor induction motor is 85% efficient and has a PF of 0.68 lagging. Calculate the motor current and the value of capacitor required to raise the PF to 0.93 lagging. 3. Calculate the torque developed by an 18 kW four-pole induction motor run at 3.5% slip from a 50 Hz supply.