Answer Posted / s raghavendra
for different types of applications different kinds of switches are required . for starting of induction motors especially 3-phase squerriel cage induction motors at start it consumes more current to stop that we keep the switch in star position and after it attains 70-80percent of rated speed switch is kept in delta mode as already backemf will be generated which reduces currrent and like this there are many applications......................................
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
what are the advantages disadvantages of connecting high voltage block( 1:1 transformers) transformers between the turbo generators and busbars.
what is a bus post insulator? explain its application in a substation.
What is dynamo function in DG sets and draw block diagram?
how can i get the formula to find out the cable size if i know the load of main fuse protection.
why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?
What is the name of the winding from which the supply is taken for load connections?
List out the different frequency domain specifications?
What is the polarization index value ? (Pi value)and simple definition of polarization index ?
specific difference of ICT&Auto Transformer
Why can't we parallel Voltage transformer secondary circuits?
A 400KVA transformer has 400 Hz frequency. If the frequency is changed to 50 Hz, then what will be the new KVA rating?
Starting Time of LT & HT Motor
how to identify vector group of three phase transformer by voltage method?
What is the difference in calculating size of AC cables compared to calculating size of DC Cables? Usually DC Cables are larger than AC Cables although they have the same ampacity. Why is it?
Explain Creepage Distance of Insulator
