Answer / gajanan

algebriac addition of all currents

In a overhead system why the voltage between line &ground is taken for basic comparison ?and in case of underground cables the comparison take only by the voltage between cables?

1 Answers   L&T,

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Star Delta Diagram with full description

0 Answers   SKS Microfinance, Syscom,

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what is the difference between general inverter and solor inverter clerly explain plz

0 Answers  

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What's an AVR? What's its purpose in Generators?

4 Answers  

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PLEASE TELL ME ABOUT QUESTION PAPER OF UPCL ENTERENCE EXAM.

2 Answers   UPCL,

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What kinds of decision are made about CT from it's Knee point(voltage & current)?

2 Answers  

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can we replace d.c.motor by 3 phase induction motor for a particular application

4 Answers  

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What are linear elements and non linear elements? and I don't want answers with graph related

1 Answers  

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how to find total current when kva is 30.4 given ? should we use root 3 (1.732) in the formula?

2 Answers  

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what is the function and use of oil filled cables specify its advantages and disadvantages

7 Answers   Alstom,

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Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?

6 Answers  

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1. Why is the speed of shunt motor practically constant? 2. Why dc series motor use to start with heavy loads? 3. advantages & disadvantages of separately excited generator over self excited generator?

0 Answers  

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