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 Categories >> Engineering >> Electrical Engineering
 
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Question Asked @ Answers Views     Select
why we increase the small speed of turbine when alternator just synchronized to grid in steam power plant pseb   2  792
1.what is surge 2.what is lightning 3.what is switching 4.difference between surge,lightning,switching used in power system 4.definition of surgearrestor,lightningarrestor 5.adv and disadv of surgearrestor,lightningarrestor 6.uses and purpose of surgearrestorand lightning arrestor 7.block dia of surge arrestor 8.blockdiagram of lightning arrestor 9.operation and working of surge arrestor and lightning arrestor 10.basic formula of surgearrestor and lightning arrestor 11.basic diagram of surge arrestor and lightning arrestor crompton-greaves   1  1273
Why should The rating of 11 kV DO Fuse is in mulyiple of hundred(200 Amp. 40 Amp, etc) Ampere wheareses the its fuse elemnt has rating in just few Amp (< 12 Amp)? ( Is it jusy beacuse of factor of safty).    1  414
what should be the motor rating for pumping water for house hold use from 60km far lake and what formula is to use please tell me    0  135
How can calculate rotor temperature of the alternator? and is there any method to calculate that    1  524
Why the standard of ambient teperature mentioned as 40 degree celcius in machines.    0  159
TRAFO 1. WHY BREATHER IS USED. 2. WHY OIL GOES DOWN IN CONSERVATOR TANK. 3. WHY WE ARE TAKING OIL SAMPLE TAKING FROM BOTTOM OF TRANSFORMER. 4. HOW TO CHECK IR VALUE OF TRANSFORMER. 5. WHY OLTC HAVING BUCHHOLZ TRIP ONLY; WHY NO ALARM. 6. OFF LOAD TAP CHANGER OPERATION PROCEDURE. 7. TR. SHUTDOWN / ISOLATION PROCEDURE. 8. WHEN THREE TRS. IN PARALLEL, ONE TR. IS NOT SHARING THE LOAD – WHAT IS REASON AND WHAT YOU WILL DO. 9. WHY TR. HAS OLTC IN HV SIDE. 10. WHAT IS % IMPEDANCE. 11. WHY TR. RATING IN MVA. 12. WHAT IS VECTOR GROUP IN TR. 13. CONDITION FOR PARALLEL OPERATION OF TRS. 14. WHAT IS TERTIARY WINDING. WHERE IT WILL BE. 15. IF TR. TRIP ON BUCHHOLZ OR TAP CHANGER RELAY, WHAT YOU WILL DO. 16. DIFFERENCE BETWEEN OIL TEMP. AND WINDING TEMP. PROTECTION 17. HOW WINDING TEMP. IS MEASURED IN CAST RESIN TR. 18. DIFFERENT TYPES OF FAULTS IN TR. Trafo - Page-1 of 2 19. WHAT HAPPENS WHEN TR. CHARGED FROM LV. 20. WHAT WILL YOU DO IF MEGGER READING SHOWS ZERO BETWEEN LV WINDING AND EARTH. 21. CAN WE INTERCHANGE BUCHHOLZ RELAY OF MAIN TANK AND OLTC TANK. 22. IF THE LINE BETWEEN BREATHER AND CONSERVATOR TANK 23. LOCKED, WHAT WILL HAPPEN DURING LOAD CYCLE. 24. WHAT IS THE FUNCTION OF OIL SEAL IN BREATHER. 25. WHAT ARE LOCATIONS FOR BUCHHOLZ RELAY FIXED IN POWER TR. 26. WHAT ARE CHECKS IN POWER TR. DURING MAINTENANCE. 27. WHAT IS IMPORTANT WHEN WE CHECK OLTC OPERATION DURING MAINTENANCE. Trafo - Page 2 of 2 kseb   0  235
why we use primary delta connectin in hight voltage transformer    2  771
What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter hcl   0  450
what is Fault level? why it is calculated? how will u decide same for our plant?    0  175
I have been short listed for sydicate clerkcal post .i have interview on 15th sept..i want to ask if i don't know kannada to read and write they won't allow me to attend the interview?Do send u r reply....... syndicate-bank   1  373
why current flow to the opposite direction of flow of electrons??????????? bhel   0  163
what is the unit of electricity????????????    4  787
How earth fault & earth leakage equvpment are works?    5  1066
What is the deference between earth fault & earth leakage    1  644
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Un-Answered Questions
 
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what kn of disc is used in 33kv,132kv,220kv,400kv,800kv transmission line 763
Is it possible to implement Restricted Earth Fault protection for a transformer without neutral CT? 329
what is load despatching 212
can anybody send the rrb chennai &rrb bopal question papers of 2006&2007.My exam is on 12 oct 2008.Its urgent 229
What are protections for dty type transformers 128
sir,in our plant we r using SATEC PM172E power reading meeters in HT panel side it is monitoring the MB data smart viewer(sever).but last one week we did not get readings inthe server only available in meeter.tell me how communicate meter and server. and also what steps we take for checking. 196
Parts of machine and their discription in details with suitable photo 136
application s to shunt coil 104
details of oil cell size of Breakdown voltage test of tranformer oil details as per Standardswith mushroom electrodes? 95
what is photo voltic cell,& what are the materials associated with that?and any spcifications like volts/cm etc? 185
How maesure earth neutral value & how much maximum value value required in between earth & neutral. 235
what is positive , negative & zero equivalent system resistance 162
Swg formulae 62
what is the difference between 50 hz freq. and 60 hz freq.? which is better and economic in them ? 183
how we arrange the hv side with delta connection in case 33/11kv of transformer. 247
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