Answer Posted / tariq
The above answer is correct but at some extent. The
connection is switched from Star to Delta when motor
attained it 70~80 percent speed of its full speed. The time
of attaining this speed is counted and the timer is adjusted
accordingly
| Is This Answer Correct ? | 18 Yes | 1 No |
Post New Answer View All Answers
How to select a cable size for particular load?
which type of amplifiers are used in multimete?
what is the IPC ? & what the uses ?
What are the protection required for Transformer, motor, Line, Generator, capacitor, that all i have to refer which standard?(Like Transformer detail IS 2026)
A 2083kva AVR was tested, phase to ground shows continuity, what is the implications
Why do we perform an open-circuit test and short-circuit test on the transformer?
1. Design a counter which counts 0, 4, 8, 2, 6, and repeats using: 1.a using JK flip flops 1.b using T flip flops 1.c using D flip flops
wht is embedded systems? what is new inthis field?
Which types of gate insttaled in static switch. Please give me answer.
plz send me HPCL apptitude paper.. maulik_elect@yahoo.co.in
Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.
FOR 16/20 MVA 132/33 KV ONAN/ONAF TYPE TRANSFORMER IT IS DESIGNED FOR 16 MVA WITH ONAN CONDITION.IT BECOMES 20 MVA UNDER ONAF CONDITION.LOAD LOSS IS GUARANTEED FOR 65KW AT 20 MVA AND % IMPEDANCE 13.75. PLEASE TELL US AT WHAT LOAD LOSS AND % IMPEDANCE IT SHOULD BE DESIGNED FOR 16 MVA AND WHAT WILL BE ITS EFFICIENCY AT 20 MVA?
the site measured knee point voltage of protection class CTs should be greater than rated knee point voltage? what about meetering class CTs. Should it be below the rated knee point voltage?
How does zener phenomenon differ from avalanche breakdown?
what is the size of ht cable of 33kv ht line and transformers ratings are 1 Mva and 5mva.please send formula also.