Why DC excitation is used for alternators? Why cant it be AC?
Answer Posted / sangeetha.np
When it is of Ac it behaves like a transformer by means of
the induction principle as there are two windings ie
armature and field windings. So in order to produce a
constant mag field we go for DC.
| Is This Answer Correct ? | 11 Yes | 3 No |
Post New Answer View All Answers
circuit diagram of trip circuit supervision relay
Can you explain about Restricited earth fault protection scheme
What is fault clearing time for Current Limiting Moulded Case Circuit Breaker?.
operation of protection relay watchdog contact?
am commissioning the trafo without connecting the neutral therefore unbalance will occur what is the alternative solution for this?
What do you mean by lighting transformer?
What is meant by impedance? difference between high & low impedance ?
What is cable tray, its type, and its support?
could anybody able 2 send me jindal steels previous papers fr electrical steam....pls send 2 my id if possible....sirisha.shaik@gmail.com
how can motor both beasrings insulation resistance can be check?
Why we are using only Dyn11 tranformer in distribution system but not using a Dyn1 in distributing system?why not and advantage and disadvantage in both
RESPECCTED SIR/MADAM- I AM PRERING FOR SECTION ENGINEER (ELECTRICAL) RRB CHANDIGARH PLEASE SEND ME SOME PREVIOUS YEAR QUESTION PAPER OR MODEL PAPER.MY EXAM IS ON (30- NOVEMBER 2008).I AM VERY THANKFUL TO YOU. FROM- HARENDRA SINGH YADAV
stand by earth fault protection (51G) for transformer rating 2000 kVA,Dyn11,33/0.400 V. LV NCT ratio and necessary resistor and metrosil values how to calculate
he compression ratio for a petrol engine generally lies between
List out the the types of Mounting Light fixture?