Answer / naresh

depends on the height of the buidling,depth of he water
coloumn for exmpl 300ft,400ft etc.....,horizontal path of
the water pipe,vertical path i.e height of the building,
after taking these one should calculate the no of satges for
ex 18,20,22 stages, 3ph r single phase power supply,voltage
230v/415v but the actual calculations no idea but these r
the constraints/the details required while selecting the
water pump motor

Answer / shri..

This is the depend upon impiller size means how mutch
impiller can deliver & how much section it can take, at
related RPM

Answer / parveen

its depends upon height of the blg. and size of the pipe

For 6600/433 distribution transformer we apply secondary side 433 volts how much voltage in primary side.

2 Answers  

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Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..

0 Answers  

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What are formula we can apply to determine the HT/LT current of 11KV/433V transformer except KVA/LV×√3. ?

2 Answers  

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when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.

0 Answers  

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what is phase voltage and line voltage? in line voltage how 415v is obtained?

9 Answers  

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Can the same motor be operated in both direction ?

12 Answers  

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what is the primary current in 415/415 v when secondry of dry type transformer is shorted.?

3 Answers  

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What is the formula to calculate capacitor bank rating for a certain load.

2 Answers  

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Where earth point should provided in Ships or Submirines.

2 Answers   SSC,

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What is the effect of electric motor stuck in star configuration,

0 Answers  

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This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers  

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How to calculate the size of cables (all minium/copper) for a particular load

1 Answers   BSL, Galaxy Power System,

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