Answer / dileep kumar

step up transforrmers because of long transmission

Answer / anuj

step up transformer vector group is Dd0

Answer / rajesh bagewadi

Bidirectional transformer used in switch yard & vector
grroup-YNDN

Answer / manisheee

it simply step up transformer

Answer / nunavath

240mva transformers r used

My system is 22kv/3.3kv transformer. client is asking to use NGR, but as we have dedicated Neutral Earthing systems which has a value less than 1 Ohm. So i want solid comparision. Why i should not use NGR as my system is already protected.Can any one help me to get out of this.how should i reply on basis of some great comparision and calculations. Please help

2 Answers   Ariel,

When should I use earth leakage circuit breaker for incomer and when should I use it for each feeder seperately?

1 Answers  

how to calculate fault level?

0 Answers   Mylan,

For a Potential Transformer(PT), the primary neutral terminal must be grounded before energization. Why....? What will be heppend if we energize the PT without grounded the primary neutral point? Why..........?

2 Answers  

Calculation for the adequacy of 380 KVA neutral earth flat size

1 Answers   Electrical,

What is difference between insulating medium and fault current interruption medium in a switching device.

0 Answers  

how many parameters can integrate with fire alarm basically ?

0 Answers   Schneider,

What is battery Amphere-hour? How the battery back up time period is calculated?

2 Answers  

How power is transferred from one winding to another in an auto-transformer? A) electrically B) magnetically C( both a & b D) neither of above

3 Answers   ISRO,

what are the differance between neutral and earthing?

3 Answers  

all interview questions with answers of ntpc (2000-2009

0 Answers   Hetero, NTPC,

I have been using an 600VA with 0.6 p.f UPS with my desktop which has 450W power supply unit. Can anyone explain how can this happen . Because the output of the UPS is 360W (600*0.6) (<450W)

0 Answers