Answer Posted / hariharan

Transformer is a static device which is used for step up
and step down voltages without changing the frequency

What is the difference between amorphous core transformer and CRGO core transformer?.

3669

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what reason of line current and phase current in star connection and line current and phase current not equal in delta connection?

2038

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what is the necessary of using inductance property in transmission lines even through resistance is used to opposes the high current flows in that?????

1835

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Dear sir, In our plant have Station Transformer having capacity,i want to know, why LV side 40 - 40MVA is given? & how we can get 6.3 KV supply from tertiary(i.e. Open delta connection), Vector Group YNyn0 - yn0 +d MVA Rating 80MVA / 40 - 40MVA + 26.7MVA Voltage rating 420 (Tap range +6,to -10)81.25% /11.5KV - 11.5KV +6.3KV

2125

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What is a system?

1131

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how can we change the phase angle b/w two phase?

5029

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HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com

1881

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we have 15 ampere variyac but we want 30 ampere variyac what we do

1867

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What is ideal IR values for ground and neutral.

1708

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what is the difference between RMS & TRUE RMS VOLTAGE

2871

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In synchronization circuit what is the function of Interposing voltage transformer(IVT)and Reverse voltage transformer(RVT)

11762

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If the feeder rating is 7.5 kw or 10 HP star-delta feeder, MCCB is taken as 63 a, contactors-32 a, how much will be the OLR rating or which range OLR should be considered when we concern about type-2 coordination?

2266

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how can check the resistance of battery contact?

2155

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what is tri state logic gate

2119

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when we gave dc supply to 220v dc motor its rpm is 1200. then we gave 180v. how many rpm of its motor. gave answer with calculation at my ID.... ravizak@ymail.com

2291

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