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what is total power generation in tamilnadu
What are the methods used powerfactor improved?
which place DC transmission line usde?
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Answer Posted / senthil kumar
Nlc,solar,wind ,tide.
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working principles of cf lamp,incandescentlamp and f lamp?
HOW WE CHOOSE EARTH'S POTENTIAL AS ZERO V?
if any body have question paper of railway (section engineering),then plz send me .i will thank of him/her.
what could be the RMS value and average value of a 4 phase sine wave?
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?
what is negative and zero impedance in 3 phase induction motor ??
Is a 300w induction motor used in a food processor as powerful as a 1000w DC motor.
What are the symptoms of a bad PG card of a drive (inverter) esp. of Yaskawa Ac Drives (inverters) G7 ?
what should be the acceptrd value of winding resistance for 2.5MVA transformer
whati s the sludge current in ups
what is meant by impedance & transient protection?
As we know induction squirrel cage motor torque Directly praprortinal to applied voltage in star connection & delta also. If I connect 55KW Motor to DOL starter in load condition does motor withstand the load & what will be the current withdrawn ? motor will not fail ?
why we take movement of rotor always in counter-clockwise direction in 3-phase induction motors?
For high frequency application we use which transformer?
When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
