why -48 volts dc used in telecommucation

0 Answers  

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Why lose 1 phase voltage in 33kv to 415v stepdown transformer

0 Answers  

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In LRS how much water PH value maintain for good operation of motor?

3 Answers  

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what r the advantage of selecting micro controller type tripping of circuit breaker than relay type tripping?

5 Answers   BARC,

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depending on what we can choose the rate of mccb considering that we know the total load

2 Answers  

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in basic 2 phase will short means tripping the power but spot welding 2 phase shorting but not tripping it will welded why.....(Q)

0 Answers  

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Difference between Profibus DP/PA?what does it stand for and how is it use in process?

1 Answers  

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HOW TO CALCULATE SINGLE PHASE AMPERES IN 3 PHASE TRANSFORMER? GIVE AN EXAMPLE PLZZZ

1 Answers  

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What is the function of stater in tube light circuit?

2 Answers   SysArc,

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directional over current relay when acted & how it works

3 Answers   NCC, ThyssenKrupp,

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what is transformor oil gread

0 Answers   Idea,

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how we done power management?

1 Answers  

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