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5- 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
38167- 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,……..,?
2272How to calculate cable sizes in sq.mm. with using motor KW? Any formula there?
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18 306773I 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.
2029what happen if i connect DYn11 and DYn1 vector group transformer in parrallel?other things are same like votage ration,x/r ratiob etc...
4 32677is there any difference between protection C.T and measuring C.T?if yes then what is the difference?
4 12560Post New Electrical Engineering Questions
why fractional pitch winding generally used in alternators?
in ACB breaker requireding 3200Amps. buscoupler getting OFF mode and again it reset and getting normal position give me a required answer?
what is RNG in the DG synchronizing by PLC?
In layman terms, what is the difference of Dielectric strength and dielectric constant when speaking of an insulating oil
1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?
what is difference between window type and wound type transformers?where we will use window type and wound type transformers?
Why do we need interlocking in a HT metering or Ring main unit switchgear?
what are the specifications we must look at to select a relay for any capacity motor?
how can we make cable shedule for controll wiring ? which details must be required for it.?
Why can't we parallel the secondary circuits of two voltage transformers?
We have two parts in generator, electrical & mechanical. how it works?
What is the formula to calculate a three phase alternator
what is gas turbine intercooling ?
how tto ingress mw in turbine explain.procedure ?
Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box
