Answer / ramji

First calculate the actual KVAR load.Then calculated the
actual PF.Then as per required PF, calculate the KVAR to be
added.This is the value of capacitor bank to be shunted.

Answer / g parsaram reddy

capacitor bank selection base on the connected load

ex - 500kw load formula is kvar = kw ( tan cos-1pf) - (tan cos-1pf)there is power factor taken lower and higher valu , ex2 kvar= 250(tan cos-1 0.8)- (tan cos-1 0.96)step2 kvar=250(tan36.36-tan16.26) than 250(0.74-0.29) than250(0.45)than kvar=114.5this is required

what is the safety of VCB.

5 Answers   Nagarro, Roto Power, RotoPower,

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how we can use resistance heating for any domestic purpose???

2 Answers  

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( Re: WHAT SHOULD BE THE RATING OF MCCB FOR 415V,3Ph,50KVAR CAPACITOR BANK Answer # 1 The capacitor current would be kvar x 1000 / (415 x sqrt3). This would be 70a approx. The MCCB selected should have *atleast 1.4 times this current i.e. 1.4 x 70= 98. So you should choose at least 100 A mccb.) regarding to this answer,i would like to know why the current have to times 1.4 to get the right amphere for the mccb.hows the formula to get the 1.4??tq

2 Answers  

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I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase), before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???

1 Answers  

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hello friends.. I have a doubt regarding the operation of dc machines.. I studied in a text book that a dc machine can be used as a generator and as a motor.. is this possible? If so,please send me the info about this topic.. you can also send your info to my mail.

0 Answers   Bhel, CVL,

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why we are maintain phase to phase clearence

4 Answers  

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1. What does mean of "PS" stand for Diff. CT class? 2. What is the formula of KW for 1Phase load inturms of voltag,current & P.F.?

4 Answers   Hero Honda,

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How to calculate LT XLPE CABLE for 11 kv / 433 v , 1000 kva oil type transformer system?

0 Answers   Tata Power,

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WHAT IS NORMAL VECTOR GROUP USED FOR DESIGNING OF TRANSFORMERS??

11 Answers  

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What does negative slip of an induction motor signify?

10 Answers   Tata Elxsi,

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what's the simultenous maximum demand (SMD)..what the diffrent MD and SMD?

0 Answers   HAL,

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Can Induction motor run at over rated speed? ( 15oo rpm is rated speed for 50HZ. is it possible to ride 3000 RPM with same motor with the help of VVVFD for continues ride of 100HZ)

3 Answers   Equate,

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