Answer Posted / amar

Alternator is two types
1)salient pole
2smooth cylindrical

what are the usual topology of transformers at different substations in the power system and why that particular topology is choosen. what are the limitaions of that topology?

2169

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If a high resistance fault occurs,then what are the changes will happen in the system?

1525

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draw singleline diagram of star to delta and dol starters

2310

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what is mind in cable

2137

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How much depth n width required for laying of 1X70 Sqmm Cable in Desert???

1677

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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

2222

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I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

4085

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How to synchoronize the generator (with gcb,GT) to grid????? ????? from Grid iam getting power (rated 400kv/20kv) through GT and its goes to UAT.,,ST.,, now my generator(rated 20kv ) ready.,, now iam closing my GCB.,, in GT iam suddenly giving 20kv on that Gt.,, what will happend

2124

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What is the maximum and minimum rating of UPS?

1579

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Any one can explaination about calibration with rotating sub standards?

2121

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How to distinguish whether MCB is DC or AC looking at it physically

2030

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hi i will D.E.E.E.is completed pls send rrb diploma old qustion papaer sent in my e mail. i.d.

2374

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How to Calculate Current Rating of SDFU (Switch Disconnector Fuse unit) for Protectionof Capacitor Bank connected to Busbar of 800Amp,in LV side of 11/0.433KV, 250KVA Transformer?

5460

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For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation

3353

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Please tell me the formulaes while designing a substation for power Calculations in designing a 33 KV Substation?????

1871

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