Answer / bivin shankar

in vcb the arc extinguishing medium is vaccum which is
having high arc extinguishing capacity .but in ACB the arc
extinguish medium is air which is having low arc
extinguishing capacity, so if we use the air circuit
breaker in the place of vcb the arc will not extinguish and
may cause the equipment damage.

technical questions asked by visa steel interview plg get me!

1 Answers   LG, Visa Steel,

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What will be the size of cable required for 5.5 KW motor ( Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

2 Answers  

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What is system earthing?what are the types?

1 Answers   ABB,

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The size and construction of bushings in a transformer depend upon?

0 Answers  

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is the value of inductance depends upon the value of thitha in doubly excited machine??

0 Answers  

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Describe: Energy efficient motors

1 Answers   Reliance,

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Why alternators are designed at 0.8 pf lag?

3 Answers  

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A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?

0 Answers   Siemens,

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how to calculate cooling requirement of datacentre from electrical load?

0 Answers  

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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

0 Answers   Bhel,

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why the earth conductor in top of the tranmission line ?

2 Answers  

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what is the function of choke and starter in a tube light?

2 Answers  

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