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We have a 1275KVA existing Transformer in a power plant project. Customer want to get it test & confirm whether it is a Dyn1 Transformer or not. Pleae let me know how to test it.
1 3947why Transformers power mentioned in KVA?. and why Generators and Motors power mentioned in KW?.
10 14482What is the purpose of Rotor earth fault relay and How to test the Rotor earth fault relay in generators and What is the procedure?.
1 4402why there is no current in the rotor body althrough the flux linking with it also get changes. why current only flows in windinds not in rotor
1 5400why we use condenser in the thermal power plant, althrough the same vapour will be again heated
Bhel,
2142WHEN SINGLE PHASE SUPPLY AS 220V, WHY THE 3 PHASE- 4 WIRE MEASURED AS 440 VOLTS INSTEAD OF 660 VOLTS (220 VOLTS PER PHASE i.e 220x3 = 660 volts ).
1 6365In case of salient pole alternator when number of poles are 4 or more than 4 it helps the flux wave to be sinusoid as air gap length is increased from center to tip , but if the number of poles are 2 how does the flux wave is sinusoidal?
1977Post New Electrical Engineering Questions
What is the maximum breakdown voltage of 11KVA and 66 KVA power line and how it is calculated?
Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.
DEAR SIR/MADAM,CLEARLY EXPLAIN ABOUT CRAWLING AND COGGING EFFECTS IN INDUCTION MOTOR.
we can run 2phase as 3phase .what will be the differnce with respect to phase angle, power, current between the two modes
State The Difference Between Generator And Alternator?
Can u Explain about the electronic trivector meter and the use of data converters in them?
why swinburnes test cannot be performed on series machines?explain
Refernce currents are to be generated using refernce cueernts how can this be done
is that any software calculator to calculate the size of cable
is the value of inductance depends upon the evalue of thitha in doubly excited machine?
What are the functions of temperature scanner in power transformer?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
Tell me about ur past electrical maintanence job
Why the earth to phase voltage is high 250 compare to other two phases
what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?
