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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
37607- 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,……..,?
2224How to calculate cable sizes in sq.mm. with using motor KW? Any formula there?
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18 306197I 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.
1974what happen if i connect DYn11 and DYn1 vector group transformer in parrallel?other things are same like votage ration,x/r ratiob etc...
4 32513is there any difference between protection C.T and measuring C.T?if yes then what is the difference?
4 12360Post New Electrical Engineering Questions
In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?
why we r not earthed Control cable of C.T. terminals
what is the range of maximum DOL and SDS can be use for pump and fan application
how does high earth to neutral voltage affects electronic circuit?
suri transmission
show the single line diagram of star delta starter with single phase preventer
what is negative d.c. voltage, why this voltage is used in base transciever station.
1600kva capacity Transformers how the bucholz relay,Oil temperature,winding,surge relay relays setting are to be done
size of condotory fron voltage level
We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?
A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.
what you have to see after one week or month from the day of installation of transformer ?
Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?
my UPS suddenly goes off and all panel light also blow off.This happens even main electric supply is not interrupted.After some time it automatically starts functioning normally.Batteries are new.
what is the method of earthing of a transformer using electrodes?
