Answer / prerna

snubber ckt is a series combination of a resistor and a
capacitor. this combination is mainly used across a
thyristor. capacitor reduces the rapid rise in voltage,i.e.
dV/dt, across the thyristor whereas the resistor suppresses
the surge current which would flow across the thyristor.

whether inrush current for lamps or capcitors should be considered cable sizing to feed that load.

1 Answers   Cipla,

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What is the formula to find out the kvar required to improve the powerfactor from .85 to .99 at 1500kw, 415v.

4 Answers   Trident,

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HOW DG WORKS ?

3 Answers  

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What is defference between earthed and unearthed cable(HT)? Which is better for under ground cabling?

1 Answers  

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What is relation between transmission lines & Communication lines ?

0 Answers   NTPC,

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What are the characteristics of negative feedback?

0 Answers  

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In all the generators, the excitation supply is DC. What is the significance of DC excitation? What will happen if AC supply is given as excitation supply?

8 Answers  

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L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

0 Answers  

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Hi, Next week Iam appearing RRB exam for section engineer. So help me to get modal question papers for this position. Iam very thankful to you. Whether question will be fully techanical format or general form. Please give me a details regarding this exam.

0 Answers  

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which strater used genearalyy???and why???

1 Answers  

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Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.

0 Answers  

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c++ write a program to use a fuction call "max"which accepts an intger arrey of size5.as an arrument and return the larger and smallest of the arrey to main without changing. the original changing of the original position of the element of the arrey.

0 Answers  

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