Why we use two wattmeter during block rotor test and no load test of
3phase induction motor? And how can we understand the neat power
requirement of from this test?
- 2 Answers
- 9803 Views
- I also Faced
- E-Mail Answers
Answer Posted / natchi
In this test, we use two single phase wattmeters or one 3phase wattmeter, during test one of the 1phase wattmeter reads positive value and other one reads negative value of 3 phase power.
but in usage of 3 phase wattmeter gives directly the whole power of 3 phase supply.
| Is This Answer Correct ? | 8 Yes | 4 No |
Post New Answer View All Answers
A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?
I Just want do EHS Certified Certification Distance Course From Govt approved,so can any body provide me details.
Hoe do calculate the Cable size for Amps rating ?
What are the major reasons for balancing hydro-thermal mix?
What are the different sign conventions used in electric circuits?
what is strip power factor?
What are the types of power in electrical power?
with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....
IN SINGLE PH TRANSFORMER IF LEKAGE IMPEDANCE DROP IS NEGLECTED ,THE FLUX IN THE MAGNETIC CORE and the lekage flux linking a winding are a)proportional to the applied v to the winding i respectively.
From what on-site components does the HT panel monitoring the bus-bars in a 11kV system take inputs?
Work done in a free expansion process is
What is the phase relationship between the primary and secondary voltages of a transformer?
what is effect of length of air gap on performance of dc motor and generator?
Write down the name of 2 lady Bir Pratin of Bangladesh
why sometime we get electrical shock while touching the ballon of dish tv connection ? which we should not get.
