star delta connection used in reduce the starting current
at 3 times . how its reduce the current please explian .
Answer Posted / m.varadarajan
when higher hp motor starts with high current, to reduce
the starting current we are using this connection,it will
reduce 1/root3 times of full load current, after motor
reaches of the rated speed, delta connection applied.this
time full voltage applied to winding and motor run smoothly.
Is This Answer Correct ? | 17 Yes | 23 No |
Post New Answer View All Answers
Define average demand?
What type of fittings and electrical accessories can be install in radiation area ?
How to test IR testing & magnetic balance test
is this the formula of building wiring to get the main breaker.Watts/volts*.8%+higher motor*(25%)=ampere. yes or no or send the correct formula for building wiring.
What is q factor?
If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?
HOW MANY TYPES OF FUSE?
Please provided formula for calculate the cable size from step up transformer to M.V panel, run overhead aluminum cables, total load is 5mega watt, total length 900 feet.
Help need in transformer !? Hello Friends The parameters of 2300/230 v 50hz t/f is R1=0.286 ohm R`2=0.319 ohm Rc=240 ohm X1=0.73 ohm X`2=0.73 ohm Xm=49.2 ohm Secondary Load impedance ZL=0.387+J0.29 solve the exact equivalent circuit with normal voltage across primery.. I know every thing but i cant find CURRENT I1=? and I`2=? Please help me give solution or only Formula please please...
What are the advantages and disadvantages of the ac motors?
What is minimum phase system?
why only exciting current is shown not primary current in transformer???
is all the servo motors having brake?please specify which servo motors having brake for stop on position and which are not.
How to calculate KVA/VA rating of PT or CT from primary & secondary voltage or primary & secondary current?
Would you recommend to replace all oil filled cables with xlpe cable for hv transmission with the current technolgy for xlpe cable?