why transformers rating are in KVA

5 Answers  

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what is field flash

4 Answers   Bhel,

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1.what is mean by 8/20 micro sec waveshape

0 Answers   Vedant,

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what is meaning of Power factor?????????

3 Answers  

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What are the various types of BUSBAR Schemes? explain each

1 Answers   NTPC,

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I 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?

0 Answers  

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1.stranded resistance values of motors? 2.how to calculate the resistance values of single phase and 3phase motors?

2 Answers   Bell, L&T,

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WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

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i have applied for junior engineer 2 c&w for Guwahati RRB please send me last five year question paper

0 Answers  

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How to know Resistance and Reactance value of main and aux winding of single phase capacitor start capacitor run induction motor to find capacitor value?

0 Answers   Siemens,

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what is AVR and tell principle and working?

10 Answers   ITC Infotech, MIOT Hospitals, YCC,

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What is effect of power factor on change in voltage

13 Answers   APNPDCL, apspdcl, My Home Industries,

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