Answer / aditya shirbavikar

The rating of any circuit breaker is decided on the basis of its breaking capacity. so, the KA rating of MCCB is the unsymmetrical breaking capacity for a particular time.

Answer / s.lenin

The KA Rating of MCCB is Defined as maximum current flowing
through the conductor or with standing capacity of the
breaker.the KA is decided mostly that incoming transformer
fault current

Answer / saraz06a0222

The value of the kA rating determines how much current the circuit breaker can withstand under fault conditions. The circuit breaker only has to withstand this for a brief period of time, usually the time it takes for the circuit breaker to trip. For example, a value of 6kA means that the circuit breaker can withstand 6,000 amps of current during the brief time it takes to trip.

why we use crushed stone in switch yard?

3 Answers  

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Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir

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What should be the voltage between neutral and earth of a UPS?

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What is the out put of a CT? How the ratio is decided ?

1 Answers  

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what topics we have to concentrate for power grid et.written test.and tell what to read for english synonyms and antonyms.

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We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?

0 Answers   SSPL,

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why HV test for cables?.why 0.7times?

1 Answers   Bosch, Prince Food Products,

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PLZ EXPLIN ABOUT CLASS PS CLASS CT .WHY THEY R DESINED AND FOR WHAT PURPOSE?WHY OTHER CT CANT BE USED AS PS CLASS CT? EXPLAIN IN SIMPLE LAUNGAGE IF POSSIBLE PLZ GIVE CIRCIT DIAGRAM?EMAIL-RAJ_SINGH_0376@SIFY.COM

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0 Answers   Exide, Punj Lloyd Ltd,

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0 Answers  

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What are the advantages and disadvantages of oil filled transformers?

2 Answers   Mercantile Marine Department, Studio College,

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Is it required to use Automatic transfer Switch in L&T panel board if we use AMF panel with DG set? How the single line diagram will be? Please forward the material to sreenu_207@yahoo.co.in

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