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3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?
18714-Why we measure the insulation resistance of main core and frame in spite of that must be connected with ground before energize the transformer?
3 113115- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch
38217- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?
2287How to calculate cable sizes in sq.mm. with using motor KW? Any formula there?
Aswani Properties, BRB Cable, Construction, Hitachi, L&T, Microcool Systems, Nahar, NWPF, Reliance, Renault, Saha Bright Polytech, SGH, TATA, Techno Electric and Engineering, TFIL, Thermax,
18 306837I need the recommended size for a 3 phase transformer at 13.8 KV Primary and connected loads of 3000 kVA at 4200 volts and 2375 kVA @ 480 volts AC.
2035what happen if i connect DYn11 and DYn1 vector group transformer in parrallel?other things are same like votage ration,x/r ratiob etc...
4 32697is there any difference between protection C.T and measuring C.T?if yes then what is the difference?
4 12576i m a frsh chemical engineer now i m confuse to attend the interview so anybody pls send model question papers to this christ_vivek33@yahoo.com
HPCL,
2206
why is heat treatment of steel metal crucial?
How many Antenna use in 6+6 with 2-way Diversity.
Briefly describe your ideal job?
I want model ofs interview question paper
What do you mean by independent suspension?
it is possiblee to produce concrete with out cracks...
How to calculate Acctually Brickwork Quantity in Honey Comb Brick in circular Soak Pit
Why corona leads to production of Ozone and glow of the color VOILET?
Explain how is a submarine able to submerge and surface?
I am a mechanical student.And have cleared the written for NTPC. Please suggest what and how to prepare for the interview.i have got only 2-3 weeks in hand.
Mention any four employment opportunities in the field of designing, manufacturing & designing?
Define why series inductor and l-section filters cannot be used with half-wave rectifiers?
explain comutator action in detail.thanks
What is the major difference between Normal control loop and Cascade control loop and when to use cascade control loop?
How much percentage of brick bats allowed in CD-75 bricks
