1 Answer

Answer :

In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to improve power factor.

Related questions

Last Answer : In a capacitor start motor, the phase displacement between starting and running winding can be nearly 90°.

Last Answer : In capacitor start single-phase motors current in the starting winding leads the voltage.

Last Answer : In split-phase motor auxiliary winding is of thin wire placed at the top of the slots.

Last Answer : Centrifugal switch disconnects the auxiliary winding of the motor at about 70 to 80 percent of synchronous speed.

Last Answer : The repulsion-start induction-run motor is used because of high starting torque.

Last Answer : In a capacitor start single-phase motor, when capacitor is replaced by a resistance motor will continue to run in same direction.

Last Answer : In A.C. series motor compensating winding is employed to reduce sparking at the brushes.

Description : The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?

Last Answer : The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.

Last Answer : In a split phase motor, the running winding should have low resistance and high inductance.

Description : In case of conductively compensated D.C. series motors, the compensating winding is provided?

Last Answer : In case of conductively compensated D.C. series motors, the compensating winding is provided in series with armature winding.

Description : Damper winding is provided in 3 phase synchronous motors to :

Last Answer : Damper winding is provided in 3 phase synchronous motors to : provide starting torque and prevent hunting

Last Answer : In a ceiling fan employing capacitor run motor secondary winding surrounds the primary winding.

Last Answer : To reverse the direction of rotation of a capacitor start motor while it is running we should disconnect motor from the supply till it stops then reconnect it to supply with reversed connection of main or auxiliary winding.

Last Answer : In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.

Last Answer : The capacitors used in single-phase capacitor motors have no polarity marking.

Description : Explain the working of a single phase capacitor start induction motor. 

Last Answer : Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc

Last Answer : During rheostat braking of D.C. series motors motor is run as a generator.

Last Answer : When two D.C. series motors are connected in parallel, the resultant speed is normal speed.

Description : A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is

Last Answer : A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is 36 Ohm

Description : What is the basic function of a capacitor?

Description : Series and parallel capacitor problem

Last Answer : Series and parallel capacitor problem 1 : https://youtu.be/MSl5mRwtjAE Series and parallel capacitor problem 2 : https://youtu.be/yGwbpyEtIyw Series and parallel capacitor problem 3 : https:// ... https://youtu.be/_7KwEwWqiNU Series and parallel capacitor problem 10 : https://youtu.be/et8MCWV_OyE

Last Answer : A universal motor can run on either A.C. or D.C.

Last Answer : A schrage motor can run on zero slip, negative slip, positive slip.

Description : What is the purpose of auxiliary controller in substation?

Last Answer : The systems of substation auxiliaries ensure operation of substations providing internal consumers of substations with operating direct and alternating currents. Any breakdown (loss) of auxiliary systems ... whole substation, as well as serious problems during its subsequent putting into operation.

Description : Explain auxiliary commutation with a neat diagram. Also draw its waveform.

Last Answer : Auxiliary Commutation At start, the Ta is triggered and turned on to carry the load current. Due to the resonant circuit R-L-C, the current initially rises, attains peak and then falls to ... , the firing of auxiliary SCR commutates the main SCR, hence name is auxiliary commutation.

Description : what is TCSC?

Last Answer : Thyristor Controlled Series Capacitor (TCSC)

Last Answer : A centrifugal switch is used to disconnect starting winding when motor has picked up about 50 to 70 per cent of rated speed.

Description : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?

Last Answer : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.

Last Answer : The range of efficiency for shaded pole motors is 5% to 35%.

Last Answer : The value of starting capacitor of a fractional horse power motor will be 300 uF .

Last Answer : If the capacitor of a single-phase motor is short-circuited the motor will not start.

Description : Which of the following motors can run on both AC and DC? A) Universal motor B) Dual wattage motor C) Flexible motor D) All the above

Last Answer : Which of the following motors can run on both AC and DC? A) Universal motor B) Dual wattage motor C) Flexible motor D) All the above

Description : Generally, Crawling in squirrel cage induction motors is tendency to run stably at speeds as low as (A) One-third of their synchronous speed (B) One-fifth of their synchronous speed (C) One-seventh of their synchronous speed (D) One-ninth of their synchronous speed

Last Answer : Generally, Crawling in squirrel cage induction motors is tendency to run stably at speeds as low as One-seventh of their synchronous speed

Last Answer : When a D.C. series motor is connected to A.C. supply, the power factor will be low because of high inductance of field and armature circuits.

Description : How to Run a Business Meeting

Last Answer : How to Run a Business Meeting Some people in business believe that too much time spent on a meeting can lower productivity. Meetings, however, are necessary to keep everyone in the group updated on what ... in reading this article, you'll surely be eager to learn how to schedule a business meeting.

Description : How to Run Faster ?

Last Answer : How to Run Faster Running speed is a combination of everything from weight, leg turnover (how fast your legs move), cardio conditioning and muscle. The following are 8 ways you can learn to run faster: ... course - run safely. Watch traffic. Do not overtrain. If injured, seek help (EG Shin splints)

Description : Instant 100 meters (How fast to run 100 meters?)

Last Answer : Instant 100 meters (How fast to run 100 meters?) This guide outlines the step-by-step preparation for the most efficient 100-meter run. 0-15 meters With your head down, you need to ... length. Constant training and the right technique will allow you to improve your 100 meter running results.

Last Answer : A rotory converter can also be run as a synchronous motor.

Description : Which type of heater is cheapest to run?

Description : In a capacitor start single-phase induction motor, the capacitor is connected (A) in series with main winding. (B) in series with auxiliary winding. (C) in series with both the windings. (D) in parallel with auxiliary winding.

Last Answer : Ans: B To make single phase motor self start. We split the phases at 90 degree. Hence, motor behaves like a two phase motor.