why is the number of turns different in current and potential coils of wattmet

7- 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,……..,?

0 Answers

how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

0 Answers Sandhar,

What is the difference between AC and DC injection methods for rotor earth fault protection

0 Answers Asian Alliance Insurance, NBVL,

Differnce between negative Pahse SequenceFunction and unbalance Function?

0 Answers Atsco, LMW Lakshmi Machine Works Limited,

1. What is maximum permissible distance between smoke detectors ? 2. How do we decide number of smoke detectors required in a large office, warehouse, hall etc ? 3. What should be maximum height of smoke detectors ? 4. Where do we use heat detector, optical smoke detector, temperature sensitive detector ?

0 Answers

what is lightning arester?generaly which type of used in industeries? why its used?

7 Answers Essar,

What is the difference between Dielectric and Insulator

9 Answers

My question is abt backlog.I had dropped one subject in my second year, and completed this subject in the 3rd attempt, so how many backlogs i have got?1 or 3?plz sujjest the answer as soon as possible

0 Answers

For more Electrical Engineering Interview Questions Click Here