Answer / saurabh patel

In power transformer Generally TanDelta Test is carried out To Measure the Insulation Resistance of the Bushing of Transformer ,But You would have Doubt there IR is measures also by a MEGGER but Megger actually (Generally ) as 5KV DC in but in this megger The Insulation is Only Measured But In actually in Tan delta test The Insulation. property of Insulator which have a Capacitance Effect When In Loading Therefore this is Taken out to measures the Loss angle of Dielecrtic . Which is Delta (loss angle of Diectric material) .

how we can calculate cable size of 230v,1 hp single phase motor ? panel to motor distance is 25 meter

4 Answers  

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I am shobana from Chennai. I am having my personal interview on 19th Dec at Chennai.kindly mail me the questions to mail id shobana.shanthi@gmail.com

0 Answers   Avalon, KK Capital,

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Corona occurs between two transmission wires when they (a) are closely-spaced (b) are widely-spaced (c) have high potential difference (d) carry d.c. power

2 Answers   Power Grid,

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If we have 630kva step down transformer to operation 3 phase motor 150 kva which size of cable is used? at circuit breaker to 3 phase motor or to electrical board

1 Answers  

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i have dry type transformers can you help me that how many tests i can do to know the performence of transformer and also please tell me about the BDV test and Insulation resistance test in oil cooled transformers

4 Answers   Hyundai,

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Dear All kindly let me know that I know about the DG Rating for Example 150 KVA,Now how i will know that how much Ampher load it can offoard.

2 Answers  

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What it the purpose of parallel phasing transfomers??

4 Answers   ABB, Reliance,

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DG cranking voltage?

0 Answers  

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why we r used DC megger insted of AC megger?

1 Answers   Adani,

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if we supply to secondary winding how transformer work?

2 Answers  

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How dia computation perfomed in cold rolling mills .

0 Answers  

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Why Alternator has 0.8 power factor?

2 Answers   Bhel,

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