Answer / tamil

CB has a relay or contactors in it, which works on the
principal of electro-mechanical(which means when Voltage is
applied to the coil contact will change its position from NO
to NC)

Answer / shinde kv

basic principle of circuit breaker is contact make and
break in load condition without with arc quenching.yes it
has electro-mechanical principle

Answer / jairaj shetty

a circuit breaker , in its simplest form is a thermo
electric device . when the rated current is exceeded , the
thermal device , made up of bimetallic strip heats up and
bends , thus tripping the mechanically spring loaded
switch .
the other form of electro magnetic circuit works by
activating a magnetic relay instead of a bi metallic trip
device .

If 11 KV breaker on the primary side of a 11 KV/3.3 KV 12.5 MVA transformer can be installed at a distance of 1000 mtrs through a 11 KV cable. If no what are the probable reasons.

1 Answers  

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Why do power lines not short out when they fall into water?

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What is the % number of various buses in a typical power system?

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what is servo motor & how does it work.

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for same rating of a transformer and induction motor which one will have higher magnetising current flowing?

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what is the difference b/w circuit breakers and relays?

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A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.

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Whether earthmat designning is done only for sub station or it can be done for multy residential complexes also? What is the size, type & arrangement of the earth grid to be done?

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what is the switching substation

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What are the different towers used in 132kv transmission line? what are the differences between the P,R,S towers used in 132KV and detailed explanation

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IN CONTROL SYSTEMS Y WE NEED TO KNOW THE STABILITY OF THE SYSTEM?WHAT IS ITS PRACTICAL USE?

2 Answers  

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1.what is the difference between ct and cvt? 2.what is the difference between pt and cvt? 3.what is the difference between relays and circuit breakers?

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