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 are earthing material

1 Answers  

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the minimum clearance b/w ceiling and plane of leaf of ceilng fan shall be ..........mm

1 Answers  

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What consists of 2 or more thermocouples to be connented series?

0 Answers  

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What are the two major types of control system?

0 Answers  

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How will calculate the current rating (withstanding capacity)of alumunium and copper cables?

1 Answers  

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installation of subsatation of33kv

0 Answers  

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lenz law application and define

0 Answers  

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Why Closing coli supervision is not required for Circuit breaker.

1 Answers   JSW,

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for what voltage will reactive power be largest in 380 kv line : a) 375kv b)380kv c)385kv

0 Answers  

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What is the difference between Floot charge and Trickle Charge.

1 Answers   Torrent Power,

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what is the use of current transformer in power transformer secondary side.?its connectyed in WTI

0 Answers  

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Whether the LIGHTNING is AC or DC?

9 Answers   Bhel, IEEE,

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