what do you mean by star connection?
Answer Posted / sareer ahmad lone
Star connection is that connection from where we can take
the neutral point.If you take three coils in a transformer
similar ends are joined together to form a common point
which is called a neutral.We can earth the neutral point.
Normally for bigger transformers like 66kV or more the
connection is star/delta,and the cost is less because the
higher the voltage the more the insulation you have to
use,so if you use a star primary you can degrade the
insulation towards the neutral point,then using less
insulation.Hope the answer is correct
| Is This Answer Correct ? | 14 Yes | 4 No |
Post New Answer View All Answers
I have motor of 3 H.P. How i found the rating of capacitor use in it in single phase motor..???
Differentiate between ideal and non ideal current sources?
What is meant by impedance? difference between high & low impedance ?
List out the different frequency domain specifications?
current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer
63MVA,220KV/6.9KV Transformer LV side neutral is connected to Earth pit through NGR. Whether this earth pit required to connect with near by below grouding earth mat or it is to be kept separate?
how a flip flop can be used as a latch?
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
please send me last 5 year interview questions
redundant connection in contactor?
where rlc series ckt used?
what is the IPC ? & what the uses ?
when we gave dc supply to 220v dc motor its rpm is 1200. then we gave 180v. how many rpm of its motor. gave answer with calculation at my ID.... ravizak@ymail.com
What is tranformer differtial?
THERMAL CAPACITANCE IS MEASURED IN..................................................