| Other Electrical Engineering Interview Questions |
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|what is defference by mcb,mccb and mpcb
|How can we calculate the rating of a cable with formula?
|what is the difference between 3 phase 3wire &3phase 4 wire meter?what is the advantage of 3p3w over 3p4w?
|Difference between Profibus DP/PA?what does it stand for and
how is it use in process?
|when voltage increases then current also increases then what is
the need of over voltage relay and over current relay?
can we measure over voltage and over current by measuring current
|How much current can a 3-1/2 core 100 mm wire carry?
|what is the multi strand cable size? 0.45mm is area of one
strand & 370nos of strand.
|why is a earth pit 10 ft usually? And, what should be the
distance betweeen two earth pit?
|Why a ballast and ignitor is required in MH and other
|4-Why we measure the insulation resistance of main core and
frame in spite of that must be connected with ground
before energize the transformer?
|What is the basic difference of turn ratio & transformation ratio for a transformer?
|For polarity test on a 11/3.3kV 2.5MVA delta-star Unit
Auxiliary transformer,415V 3-phase supply was applied at
the HV. Connection between Aa was made with a 2.5mm cable.
As soon as power was switched on the cable caught fire and
burnt. This test was then abandoned. It is noteworthy to
say that a similar cable was also used in a similar
transformer for the same. The cable did not burn and test
was successfully completed with good result. What is wrong?
Please, help me out.
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