which types of tests are required after commissioning of
6.6 kva tranformer?
Answer Posted / m k
after commissioning breakdown voltage test of oil and dissolve gas analysis of oil should be performed periodically.
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which type of cabel
i want to put single phase load on scott connected transformer,eventhough how to balance the transformer.
Which power will flow first if we switch on a motor Active or Reactive? How?
what is circuit recombiner and how it is different from circuit breaker
Which of the following alternatives will be cheaper (1) A 100 h.p AC, 3-phase motor (2) Four motors of 25 h.p each (3) Five motors of 20 h.p each (4) 10 motors of 10 h.p each explain
From what on-site components does the HT panel monitoring the bus-bars in a 11kV system take inputs?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
How to calculate size of HT breaker with the help of Amp (current)? Please provide answers with examples.
I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?
what is the formula of starting current of 3phase and 1 phase motor???
how to carried out DAR test in 11 KV Alternator ?
i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value
What would cause a 240v choke that should give 110v out on a 16w lamp to gradually increase to 160v?
What is power distribution criteria for converting single phase unbalanced residential load to 3 phase star connected balance system. Does total KW converted to 3 Phase. Means Divided by root 3.
what curve and rateing would you use for a three phase 0.75kw motor?