Answer Posted / yash sharma

star connection - phase voltage is 1/1.73 times line voltage so speed will be less and required insulation will be low , hence saving of copper achieved. now for delta start you motor which is in your mind!!!!

sir i ve applied for hindustan petroleum and power grid india ltd..and the exams on feb 22.can you pls send model papers and tell how to prepare for those.i need to get into any of these for sure.....

2225

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Why does the adjacent zone of protection overlap?

1186

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What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?

2759

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full form of electrical?

2780

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what is difference between 2 pole structure and 4 pole structure in transformer yard

6136

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What is the percentage loss for aluminium wire for HT line more than 11KVa

2175

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How can we calculate ac current from the given DC current when AC voltage is given?

2010

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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.

1037

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If rotor works in clock wise what happens

1954

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what is harmonics? what are the factors it will depend upon

2081

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How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance

2080

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Power factor =1.000 at factory in supply. However, PF = 0.8 at motor end. Current = 100 Amp, Voltage = 400 V. What is the power distribution loss? Can I reduce it by adding capacitor at the load feeder?

2107

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Single line diagram for dbb (double bus bar)system.

2004

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in dc suppy frequency is zero why? if dc frequency is zero how to exist dc transients and ac transients

2225

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what kvrah y we need to take the readind of that

2156

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