How the starter control the starting current in three
phase AC Motor?(In DC apply the reistance).
- 6 Answers
- 14120 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
define superposition theorem thevnin theorem ,norton theorom?
what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?
how to find the Motor,s insulation Power?
L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.
Explain with example of functional requirements of protection relay in terms reliability, selectivity, sensitivity
Difference between a pilot wire and a normal conductor?
We have studied about many techniques for finding the stability of system, ROOT LOCUS, ROUTH, BODE PLOT, POLER PLOT etc. In these which is used where. what are the difference among them... PLZ tell me.......
WHAT IS counter flux IN CT?
what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker
What are safety device in vcb and acb?
What are m circles?
whether starting current is limited to rated current of motor through soft starting or it exceeds the rated current?
How to confirm the Phase shifting Transformer VECTOR GROUP relation , as below ZNy11.45d10.45-ZNYy0.15d11.15
how to calculate the surge level of surge suppressors related to the SF6 cicuit breakers?
what are the installation procedure of high voltage power transformer,CT,CB&PT?
