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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.
1 2772what will happen when power factor is leading in distribution of power?
AMET, JTO, Power Grid,
10 23541In 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 9347which fault is severe and why?between lll fault and lllg fault which fault is severe and y?
GE,
2508suppose generator rating is 50 kw,load is 25 kw,hw much d generator ll generate?what about d remainin power?
NHPC,
2 5488for 5KW resistive load can anyone please suggest me whether to go for UPS/Inverter or Generator depending upon cost calulations
2087I 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?
1872why 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 4796Post New Electrical Engineering Questions
what is difference between earthingpits,earthing grid & earthing mess?
being an electrical engineer why you wanna come into software i have an very good academics what answer i have to give
what is the use of sdf?
what is the constructional difference between a power transformer and potentian transformer?
what is feed back and what are feed back amplifiers?
what is the minimum recommended leakage current of an earthed cable connected to the body or skid of an alternator
induction 3 phase motor terminal connection
what is mppt (maximum power point tracking ) and how they used in solar power generation ??? what are the main components used in mppt?????
What are the parts in a inverter?
if the load is 80 amp for main fuse and 100 amp for breaker so how can we calculate the cable size (cooper ) .
how to compute kvar in substation feeder to improve power factor and sending voltage
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
How to calculate energy stored in a capacitance
what is the reqirred voltage in HT motor to get full RPM on no load test?
Draw the vector diagramme for Asynchronous Induction Generator at noload,half load and fullload.
