Answer / singa

Neutral is a conducter used as return path.
It is having low potential compared to phase.
Whereas an earth is haivng zero potential

Answer / vikram

it is balance the main line

An 11kv system consisting of an underground cable to a sub station about 300 meters away was shut down for about 10 hrs. On energising, it tripped off on earth fault about 10---20 mins later 6 times but since than it is not tripping.its already 3 weeks now. The SPAJ was found to be fine. what could be the cause.No test had been done to determine the cause of the trippings till now because of demand.

2 Answers  

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what is meant by oil filled power & distrubution transformer ? if anybody know the link of detail about above transformers means plz send it i have interview on this week ? plz help me

3 Answers  

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what are the principles of a booster converter?

0 Answers  

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We have got the HT connection of 1000 KVA in which we have installed a seprate APFC panel at the PCC end & seprate KWH meter is installed. My question is that does the KWH reading shown in the meter is a part of the Consumption ???? ( approx 500 units is shown)

1 Answers  

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what is difference between earth and ground?/

3 Answers   Sree Rayalseema Green Energy Limited SRGEL,

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Draw the line diagram of diffretial relay connected to transformer?

0 Answers   NTPC,

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What is various types of electrical formula?

1 Answers  

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Zone of protection and tripping scheme of arc protection relay.

0 Answers   KSEB, L&T, Siemens,

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How do we calculate over and under frequency tolerance from generator data?

0 Answers   DPS,

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HOW MANY TYPES OF FUSE?

0 Answers  

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WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

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If I have Energy Meter Ratio as 100:5 & Also I have CT Ratio as 50:5 then what will be my multiplying Factor(M.F.)

0 Answers  

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