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hii.i am a B.TECH(EEE) graduate.i want 2 know wat type of qusns r asked in sbi clerk interview 2 candidates like me??kindly post answers ASAP..
1 2644How do we measure earth fault current in Generator Transformer(20/420kv),Station Transformer(20/11 kv) and Unit Transformers(20/11kv) for our plant system, since these don't have any Neutral earth Fault relay connected to their Neutral Earth? But for Unit Service transformers(11/.433 Kv) we have an Earth Fault Relay connected to its neutral earth.Why is such so?
NTPC,
1 4814A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03
2013ITI r/tv trade APPLY (J.T.O VACANCEY) ALSO INCLUD AITT ELECTRONIC,WRITEEN XAM DONE 23.03.10 BUT NO RESPONCE WHY ANATHER ID gopal_gh007@rediffmail.com
3411why voltage form factor of PT are increase , when it is ecpected heigher spikes in system. how it is calculated.
HAL,
2138what is the difference between the following 2 situations ? 1)Line & Neutral=240V Line & Earth=230V Neutral & Earth=10V 2)Line & Neutral=230V Line & Earth=240V Neutral & Earth=10V
2 6641What is the effect on power factor, shown by a trivector meter; incase of reverse phase sequence. If the power factor of a system is lag what meter will show in case of reverse phase sequence connected to the meter. and What in case of lead.
TATA,
2315Post New Electrical Engineering Questions
why tertiary winding is used in transformer with diagram?
how to decide choke rating for drive?
hai iam arunkumar. i have applied for an section enginner in rrb. i want lat 5 years solved question papers. if u have please sedn it to arun30682@gmail.com
from where the self excitrd induction generator get the power?why is the voltage regulation is poor of seig?
Which material is used for the core of a transformer and why?
If there are two transformer having rating of 2.5mva, 6.6kv/440v(satr-star),and the load is 600kw then what is better to maintain less losses in transformer having both transformer in parellel or only single transformer connected to load? Please give calculated answer
The ripple frequency in output of fullwave bridge rectifier is a. Half the input b. Twice the input c. Same as input
How many gap between finger contact in a.c.b. and v.cb.?
State angle criterion.
defination of transistor controlled series capacitor
how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?
In the magnetic fluxes, what is the role of armature reaction?
Why we are using Isolation Power Transformer inplace of commercial power transformer? What's the difference between them?
why only exciting current is shown not primary current in transformer???
What is the formula for calculating no-load current?
