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.

what is the simple meaning of harmonics?

4 Answers  

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how to test an MCB

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In a 11KV 3phase system do you need to earth both sides of the cable?

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Dear All, Can anybody please tell me which value(saturated or unsaturated) of sub-transient reactance(Xd") we take for the calculation of fault current of the system?

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what is power load and lighiting load?

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What are the applications of different multistage amplifiers?Plz also write advantages of these amplifiers? Thaaaaaaaaanx

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What is the control action?

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How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.

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why is the transmission voltage is multiple of 11?

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what different in delta & star connection in motor?explain

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Which colour of earthing wire

1 Answers   Aravali,

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How can i calculate the Breaking capacity of molded case circuit breaker, is the breaking capacity of CB for Diesel generator shall be less than grid supply's breaker ?

0 Answers  

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