Answer Posted / p_g

In practical cases the three phase voltages are not equal and there will be presence of potential at the neutral point and neutral is earthed to provide the path for unbalanced current during normal operation. The earthed neutral also helps during any abnormality in the system due to fault,it allows heavy currents to flow into the ground before the system isolated by means of protection system.

in 1-phase 230v,how in 3-phase 440v. in each phase in between 230v.

2913

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what is the difference b/w ATS and HTS?

2238

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HOW MANY TYPES OF FUSE?

2151

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what is the maximum permissible limit value of leakage current and leakage counter reading to replace lightining arrester?

5176

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Define phase lag and phase lead?

1190

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We have studied about many techniques for finding the stability of system, ROOT LOCUS, ROUTH, BODE PLOT, POLER PLOT etc. In these which is used where. what are the difference among them... PLZ tell me.......

2268

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HOE WE CAN IMPROOVE BY USE OF CAPACITOR

2011

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the winding of Generator and Motor is star or in delta ? and why

1154

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What is a Phase shift meter? Where can I get one?

2294

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What is meant by cold loop test in instrument

2672

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What is the Designing & Selection Procedure for a DG/Transormer of rated capacity?

2232

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which metal is use in shunt

6739

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A ray hit a smooth regular surface at an angle of 20 from the normal. Calculate : 1. The angle btw the incident and reflection ray. 2. The angle of deviation.

1988

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In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?

2231

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Dear sir, In our plant have Station Transformer having capacity,i want to know, why LV side 40 - 40MVA is given? & how we can get 6.3 KV supply from tertiary(i.e. Open delta connection), Vector Group YNyn0 - yn0 +d MVA Rating 80MVA / 40 - 40MVA + 26.7MVA Voltage rating 420 (Tap range +6,to -10)81.25% /11.5KV - 11.5KV +6.3KV

2219

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