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how to calculate regulation constants for over head lines? and what are the regulation constant for raccoon conductor at different voltage level and different P.F?
1979Whether should be the oil level in OCTC transfomer? It should be upto winding immersed completely or should be upto tap changer s/w? How it will affect the performance of the transformer. Rating may be 33KVA
1838iam completed my DEEE in eillm university. can i get the c licence in tamilnadu its possible or not
1 3897why motor range is available 22kv,30kv,37kv,45kv and so on? why motor range is not available 21kv,24,25,26,27kv and so on?
2799What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection
ABB,
3824What is genrally the % Impedance of a Dg set? How can we calculate Earthing conductor size for a DG set?
4038What is effect on in zone and out zone fault if CT chosen for phase side is Vk/2<5mA and Neutral side is Vk/2<15mA on REF protection of Transformer
ABB,
2382What is the basis for selecting Vk/2 or Vk/4 for REF and Differential protection of Transformer and What is the significance of magnetising current
2403Post New Electrical Engineering Questions
In Power cable specification what is U0/U and Um.
Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
what the function breaker failure scheme, how is it operated
how to calculate the Neutral transformer impedance?
Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?
what is the benefit of floating our DC source? if i have two floating DC source of which 1 has a ref voltage of -21VDC and the other of -18VDC. can it be connected in parallel to share a common ref voltage? if not, how do i make both sources to be of common ref voltage? tks
Transmission through a short line depends on
can you plz send l&t aptitude questions if available its urgent plz plz plz
if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?
What the formula for calculating no.of earthings & size of earth strip for 100mX90m shop.
I have done my m.tech in electrical engg discipline. Can any one please suggest me how should I prepare for getting into phd in iit or nit.How should I prepare for getting into lecturership
What is precision of a measurement?
What is inrush current?
what happens to the supply voltage if there is any change in frequency?
What is FM200 Gas??Applications........
