Answer Posted / william lobo

All transformers are rated in KVA or MVA if they are big
size. This is because it has a particular capacity and we
cannot utilise beyond this capacity. suppose you have
100KVA transformer; then you cannot use more than 100kva
capacity. If you do either transformer will burnt out or
the circuit breaker will trip.

What does the kvar means?

1185

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RESPECCTED SIR/MADAM- I AM PRERING FOR SECTION ENGINEER (ELECTRICAL) RRB CHANDIGARH PLEASE SEND ME SOME PREVIOUS YEAR QUESTION PAPER OR MODEL PAPER.MY EXAM IS ON (30- NOVEMBER 2008).I AM VERY THANKFUL TO YOU. FROM- HARENDRA SINGH YADAV

2087

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Why do we perform an open-circuit test and short-circuit test on the transformer?

1097

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how to select the isolation tranformer for siemens 802dsl cnotroller

2039

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where was current transformer protection units used and why??

2015

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Explain about Dubai electrical sysaem? Explain about Dubai drinking water system? Explain about Dubai Burj tallest building Electrical,Water.etc.. maintenance system?

2154

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Explain Creepage Distance of Insulator

2193

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What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?

1474

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Match the following a)(X'+Y') b)X'Y' C)XY 1)NAND 2)NOR 3)Carry

1905

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state working of halogen lamp?

1803

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I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

2292

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What is acsr cable and where we use it?

1134

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PLZ EXPLAIN THE INTERLOCKING AND CONTROLLING OF CONTACTORS????HOW CAN I DO THAT?

6800

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why we use condenser in the thermal power plant, althrough the same vapour will be again heated

4842

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what is sevice settings for mccb?How can be it setted?

2188

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