Answer Posted / manoj tyagi

for electrical machines max. eff.
veriable ohmic losses=constant core loss

A 10 MVA, 66KV, 50Hz, Y-connected 3-phase alternator has synchronous reactance of 0.635 Ù. It is working at full load at 0.8 lagging p.f. condition. Find torque angle, neglect armature resistance.

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What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?

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What is resonant frequency?

1279

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Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

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Define Electrical Insulation and examples of Solid,Liquid and Gaseous insulating materials?

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Why have to use copper cable for local isolator to motor ?

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how much flux density of CRNO core

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Is a 300w induction motor used in a food processor as powerful as a 1000w DC motor.

2223

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how to Select Lighting arrester? What r the parameters to be considered for the selection of Lighting arrester ?

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hello friends this is krunal here.. i have applied for he officer train in hpcl electrical stream.. any one who have applied before for electrical stream please help me out.. post ur reply to my mail id: krunal_airforce@yahoo.com.. any tips, old questions for paper or any help will do.. plz help me.. your faithfully, Krunal Darji

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How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?

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what r the checklist while installing 500 kva transformer

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Q: How to calculate Transformer losses , tell us by Formula.

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What are the effects of adding a zero to a system?

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what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?

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