Answer / vishreddy205

for the protection of breaker when
breaker doesn't operate for
abnormalities then main breaker act
as a backup protection

Answer / hardip dodiya

For Protection of Breaker and protection of EHV Bus-bar in
EHV and HV switchyard. all S/s breaker have one NO/NC
Contact connected to Bus-bar control panel in which. at
time of fault, Breaker Stuck up due to Mechanisam prob or
failure of Trip coil or any mechanical damage problem.
After it TIME-Delay time almost 200ms. busbar control
panels sense this abnormality and give command to all
breaker to trip which is connceted to EHV Bus-bar.

Protect the S/s Equipment.

Answer / shailesh

The main function of LBB to get protection (To trip breaker)
when main breaker not trip due any reasons.

I have 2500KVA transformer delta/star,13.8KV/380V provided with LV 4000A breaker. Already I have 2300KW motor feeder with a full load 90%. Is it possible to connect another 1600A from that breaker? If so how the calculation is done?

0 Answers  

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When we getting shock, its we getting from voltage or Current.

14 Answers   Juniper Networks,

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without name plate detail of blower how we can find out the HP & Rpm ? the input voltage is 230v single phase

1 Answers  

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how induction generator generated the power without excition like syncronous generator.

3 Answers  

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what is the CT & PT. where is it uses.what is the using that plese kindly answer me...?

4 Answers   Cap Gemini, JLL,

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what is residuel magnetism

1 Answers  

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What is the differance between negative dc voltage and positive dc voltage because some circuit uses -24,-5,-12,- 15,volt dc supply

10 Answers   eLab, Hero Honda, NTPC, Suzlon, Teradyne,

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What are the advantages and disadvantages of open loop control system?

0 Answers  

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What are the protection required for Transformer, motor, Line, Generator, capacitor, that all i have to refer which standard?(Like Transformer detail IS 2026)

0 Answers  

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why the electrolyte level in lead acid battery is maintained 2.5 cms above electrodes?

0 Answers  

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what is load vs Torque curve & why it is used?

0 Answers  

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How do ACB are maintenance, what are the problem occurred in ACB

1 Answers   KIML,

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