which Machine u will prefer to use at place where Flammable gases are coming out & why ??

6 Answers   NTPC,

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Is RTCC panel needs any control supply.

0 Answers   HPCL, Schneider,

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What is YNyn Transformer? and what are the other types in this?

3 Answers  

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what is the resistance value of earthing pit and why they are connected?

6 Answers  

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The inventer is a battery, but if lost current at home u will turn on the fan but the is AC and inventer battery is dc . Then how the fan was rotating. What device Or machine in fan converst the Dc power to Ac power

0 Answers  

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In a synchronous motor armature current flows due to revolving flux which in turn rotates the load,but in no load condition armature current is zero hence thr is no revolving flux then how motor rotates?

9 Answers  

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What is the calculation for 1000Amps Air circuit breaker relay settings.

1 Answers  

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how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

0 Answers   Tyco,

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sir, i want to know the calculation for find rated current for cable sizes.(both copper & aluminium) with examole. please sir for example: 35sq.mm al.cable is withstands for how many amps? is suitable for 45kw motor?

5 Answers   L&T,

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what is the significance of per unit impedance ?

7 Answers   HP,

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how can we convert 48V dc into 12 V dc? Any standard device for it??

2 Answers  

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why impedance relay is used for medium transmission line protection

0 Answers  

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