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oil sample dielectric test gives the insulation rupture voltage at 26 kv. is this transformer safe to be operated . The working voltage is 11 kv
2 4510We have one 500KVA transformer. We have tested REF relay and commissioned. After one and half year, due to some ground fault in one of the DB circuit Transformer tripped by REF relay. What will be cause and remedy. Please advise?
1 5314HARMONICS ARE ALWAYS IN INTEGER LIKE 2ND OR 3RD HARMONICS,NOT IN FRACTION LIKE 0.5 HARMONICS.....????????
2 4461what is resonance in electrical circuit and its effect? where we get high resonance and low resonance?
1 3219what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?
HAL,
2463E.B sending end to receiving end 33kv ug cable laid 8Km,receiving end to ss1,ss2,ss3,ss4 all are Approx 800 Mtr,can go for 33KV to 430V or 33kv to 11kv in receiving end and 11kv to 430 near ss ,which one is good for technically and economically.
JLL,
1 4214Post New Electrical Engineering Questions
How to Make relay co ordination chart for a Electrical power distribution of a plant
Draw a SLD for main panel for school having connected load of 1200kw and emergency generator 200kw.also show the increase of additional load of chiller 225kw in the lv panel indicating meter postion size of transformer ,cables and capacitor bank.
What is the name of transformers oil filteration equipment?
What is the HVDC Transmission System? What are the conditions applicable to lay an HVDC Line?
We are planning to synchronized DG's with our captive plant in the event of black start of plant, but before sync we checked voltage of DG with our plant voltage and it varies from 5 V to 450 V. So in this condition how we can sync DG with plant ?
all interview questions with answers of ntpc (2000-2009
with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....
Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0
How much of the total hydro power potential has been exploited so far in india?
We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.
how to calculate the step resistance for slipring induction motor,how you deside the no of step for that?
Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.
What is the reason that the humming sound is coming from the induction furnace panel?
how much maximum load a 2 core (Single phase) 16mm aluminium wire can take ?
1.What is captive power plant? 2.What is national grid?Give brief idea.
