I have 480V Single phase and I am trying to figure how big of a transformer (KVA's) and Primary breaker size I need to provide 200 Amps at 240V for a building.673
what will happen when power factor is leading in distribution of power?10 14314
In CDG type IDMTL realy O/L , E/F, O/C which are used for out going feedrs,on R-phase o/c element, Y-phase , e/f elecment and on b -phase o/c element will be connected . Why the earth fault on center phase only, why not on other two phases?2 6603
which fault is severe and why?between lll fault and lllg fault which fault is severe and y?
suppose generator rating is 50 kw,load is 25 kw,hw much d generator ll generate?what about d remainin power?
What is the significance of vector grouping in Power Transformers??3 3880
how we do Vector group ,magnetic balance and tap changer test in Transformer?1149
which type of motor is suitable for water suction pump ?4 2954
for 5KW resistive load can anyone please suggest me whether to go for UPS/Inverter or Generator depending upon cost calulations746
Define motor & pump?3 7618
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?560
why we not connect the 12 V batteries in parallel to get the more backup supply for an UPS ? wheter off line or on line UPS ?2 2229
how can i apilly for electrical c licencese.sir,i completed B.Tech in electrical & electronics engineering in 201onot working any company
(1)Can earth and be conected together (2) what is the diferent between earth & neutral
How many size of cable required for a 300m long and 30kw inductive lode
Write a note on materials used as a fuse element.
How to Calculate KA Rating of Main LT Panel
In which of the following case, the rotating magnetic field is reversed? A regenerative breaking B plugging C dynamic breaking D forward motoring
Formulae for calculating the transmission line losses for different voltage levels
WHY THE RATINGS OF THE TRANSFORMER IS 33KV WHY NOT OTHER???
Why control of DC motor is simpler?
what is current check gurd relay?
If the Brush of DC motor is shifted by 90 deg, then what happens to voltage and torque? Both voltage and torque are zero. how to justify the answer?
Which power will flow first if we switch on a motor Active or Reactive? How?
In India the supply voltage is 230 volt A.C. During the negative half cycle phase becomes neutral and neutral become phase? or what will happen during negative half cycle? how the electrons flow during positive and negative half cycle?
list the advantages of RCCB over other circuit breakers?
Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.