Interested to Buy Any Domain ? << Click Here >> for more details...
How the starter control the starting current in three
phase AC Motor?(In DC apply the reistance).
- 6 Answers
- 16295 Views
- I also Faced
- E-Mail Answers
Answer Posted / lovkesh arora
Whenever you start a big heavy electric motor, you need to
start it slowly to prevent the rotor overheating and
drawing an enormous current. When the windings of a 3-phase
motor are connected in STAR the current is reduced to only
root three of the normal running current that is taken when
it is connected in DELTA.
Once the motor picks up speed, the connection is changed to
DELTA so that the motor runs at full speed and torque from
then on. It's a bit like using the gears of an automobile.
| Is This Answer Correct ? | 12 Yes | 1 No |
Post New Answer View All Answers
Why do we avoid electrical conduits in floors at apartments?
How you calculate the repturing capacity of a HRC fuse
What is mathematical model of a control system?
What is the role of Dedicated earthing in UPS System?
How to decide cable tray size?
How does a digital electronic meter work??????
On what cycle does thermal power plant operate?
Why do we need interlocking in a HT metering or Ring main unit switchgear?
What are the symptoms of a bad PG card of a drive (inverter) esp. of Yaskawa Ac Drives (inverters) G7 ?
A Generator is in running condition and Rotor earth fault alarm is coming.How to check on line(i.e in running condition) whether there is actual earth fault in rotor or not.
why the difference arise between HT reading & LT reading (submeters fixed in complexes, apartments etc)if the power factos exceed from 0.9 to 1 can the ht meter reads fast?
Hi guys! Plz help me to answer the following questions. 1. What are the types of transmission line energy losses? 2. Why are the VLF are used some types of services? 3. What frequencies are used for reliable beyond the horizon terrestrial communication without repeaters? 4. To permit selection of 1 out 16 equi-probable, what is the number of bitis required? 5. What is the most common modulation used for telegraphy? 6. What is the multiplexing is used to increase the capacity of the optic fiber? Thanks
How can calculate the rating of a alternator for a given specific load with formula
Maintenance of transformer???
how braking & making capacity of circuit breaker is calculated?
