1.What do you mean by inductive and capacitive parts of an electric circuit. 2.What do you mean by decrease of inductane and capacitance of a network? Please dont give me the text book answer.3. What is class X ct and its applications?

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Sir we have 12.5 MVA(110/11KV) transformer (Y-Y) connected,which tripped showing earth fault,when we charged transformer it stood OK ,but on connecting 11 KV feeders it tripped showing earth fault.our service engineers found that the B phase and R phase phase connecting to neutral broken from HV OLTC(on load tap changer),and R phase and Neutral is ok.Dissolved gas analysis shows that accetline content is high,tan delta value is 12.My dout is it is an internal fault of transformer,why REF or diffrential relay is not acted?

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How to calculat the ratio of HT\LT in energy meter

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in the exciter the power is feeded from battry or control or whatever.and we need it in the generators for the stating . do we need it in the shutdown also?i mean the exciter>

2 Answers   Shell,

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advantage,disadvantage,aplication of sensorless direct torque control of induction motor

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how many testing use in power transformer?tell equipment names?

2 Answers   ABB, Electrical,

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what happen if the secondry winding of the transformer is having less no of turns compare to the primery winding.

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Will an earth leakage trip be activated if the component or wiring is faulty on low voltage equipment.Example An electrical Cat Scarer placed in the garden and water gets into the wiring.

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what is the ohmic value of transformers

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How would you supply a single house hold load from a 3-phase supply coming out of a sub-station?

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what is the std. earthing resistance for 440V system or m/c, 33000/440 Volt substation? What is the std.?

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how does it help for selection of a transformer.

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