why onlyseries motors are used as universal motors? why not shunt?

4 Answers   TCS,

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what is suitable cable for 25 HP motor ? start with VFD ac supply 50 hz

3 Answers   Mac,

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I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

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i have one transformer 1000kva, 11/.433kv. we are using 200/5 amp. ct unit for measuring purpose, & one 800 amp. V.C.B Unit for the same t/f operate, i wants to known the primary current of T/F is only 53 amp. why we used 800 amp. V.C.B ? & 200/5 amp. CT Unit.

4 Answers  

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How to calculate HV Cable Sizing & what are the factors to be considered for selection?.

2 Answers  

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Why the transformers making noise?

2 Answers   L&T,

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what is meant by switch fuse unit ?

3 Answers   Thermal Powertech Corporation India Ltd TPCIL,

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I WANT BHEL PREVIOUS QUESTION

0 Answers   Bhel,

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what is a bus post insulator? explain its application in a substation.

1 Answers   Enercon, HAL,

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what is pressure relief valve in D.G ?state its function?

3 Answers  

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Generally In transformer Tap Changer on HT side, but I have seen in 66KV side in 220/66 KV, 100 MVA, Areva make transformer. Why ?

7 Answers  

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whu does the power factor of diesel generator always be 0.8. please explain

5 Answers   Dalkia,

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