Answer / vinoth_sundar

VCB is vaccum circuit breaker which is used in HT lines.
MCCB is mould case circuit breaker which is used in LT lines
upto 1000V

Answer / guest

vcb is placed on hts lines and mccb is placed on lts lines

Answer / rajan.s

vcb in HT BANEL 33KV mccb lt RANGE 25A TO 1600A

Answer / vinayak

I think the vcb's are used for HT
lines(above 33kv) and mcb's &
mccb's are used on LT lines upto
33kv.

how mass curve differs from hydrograph.

0 Answers  

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what is the difference between directional & non directional earth fault with example please explain.

0 Answers  

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In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase and other end to earth..will the bulb glow or not..if not why?..i'm touching the bulb in star connected side...

6 Answers  

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I have 12MW gas engine based power plant its running parallel with grid. my problem is When cpp run in island mode(without geb) that time geb transformer power factor is 0.2 lagging. When cpp run with parallel that time power factor is 0.94 lagging So how can i maintain power factor ofgeb transformer in island mode 0.9 lagging?

1 Answers   SPCL,

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three owners X, Y, z owned some tractors with them, on the first month x gave away the same amount of tractors to y and z ( as much as they possed), similarly in the 2nd month y gave of to x and z similarly by third month z gave to x and y. after this all X, Y, Z had 24 tractors each.

2 Answers   econ,

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The capacity of the transformer is 20/25 MVA, Ratio is 132/11 KV, Vactor group YNyno. and impedance is 10.07%. As per the calculation the secondary current is 1312.2Amps. The maximum fault current the transformer should sustain is 13.030KA. How many times the transformer should sustain the maximum short circuit current of 13.030KA over a period up 1 Year. The transformer is repaired one & 10 Years old.

1 Answers  

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Why slip-ring and brushes are not required in squirrel cage induction motor?

4 Answers   L&T,

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if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.

0 Answers  

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what are the duty ratings in DG sets?

1 Answers   L&T,

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what is dc system? how getting pulse from rectifier?

1 Answers   ETA,

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what is IMPEDENCE? FORMULE?

6 Answers  

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which is more danjerous high voltage or high current

0 Answers  

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