Answer Posted / hitesh ambaliya
hopkinson's test is also known as regenerative test.There
are three methods of test of dc machine.1st is direct method
, 2nd is indirect and 3rd is regenerative .here in
hopkinson's test two identical machines are used. identical
means same ratings.one machine act as motor and second as
generator. both machines are mechanically coupled.now when
supply is given to the motor there is losses and output
given to the generator. so it produce power which is given
to the supply.so it is back to back test.so her less power
supply is required. approximately 3.7 v.the advantages of
this method is that less power is require. 2nd is this test
performs on full load test thus we can find temprture rise
on load.disadvantage of this test is that to get two
identical machines.
| Is This Answer Correct ? | 53 Yes | 13 No |
Post New Answer View All Answers
Why do power lines not short out when they fall into water?
how are reversing the direction of rotation of dc motor
what is the difference between ac motor and dc generator
I HAVE BEEN SELECTED FOR APGENCO A.E(ELECTRICAL) 2008.HOW MUCH WEIGHTAGE FOR INTERVIEW AND WRITTEN TEST.HOW I HAVE TO PREPARE. PLEASE GIVE INFORMATION IF U KNOW.WHAT ABT G.D THIS TIME.CALL RATIO 1:2
i have done diploma and btech in EE and live in Chandigarh so kindly help me how can i make my competency certificate in my area.
why and how voltage sharing in transformer, during magnetic balance test ?
What is the settings of distance protection relay in 400 kv line
I want to merge a cable..in between two metering Cubicals which contains CT's and PT's and Energy meter..before taking merger..what are the common things required?
Define bibo stability.
describe the Tranformer testing procedure
Can u tell me design of switch yard
What is routh hurwitz stability criterion?
What is meant by turbo alternators?
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
what is capacitor voltage transformer?? how it is different from potential transformer?
