Answer / aamod tripathi

IN GIS SF6 GAS IS USED FOR INSULATION.SINCE SF6 HAS HIGH
DIELECTRIC STRENGTH THAN AIR. AND THUS GIS IS USED FOR
HIGHER VOLTAGES AND REQUIRES MUCH LESS SPACE THEN AIS BUT
AT HIGHER COST.

Answer / a.yougaraj

AIS: AIR INSULATED SW. GR.
GIS: GAS INSULATED SW. GR.

Answer / eswari

GIS - Gas insulated substation
AIS - Air Inuslated Substation

GIS - high efficiency, requires less maintenance, less
space and less global warming when compared to AIS. but GIS
cost is two times higher than AIS.

Answer / janardhan reddy

IDENTIFICATION OF ERRORS IN GIS IS IS DIFFICULT AND IT WILL TAKE MORE TIME WHEN COMPARED TO AIS

Answer / jaideep

gis meanse
gas insulated substation
ais means air insulated substation
gis is of high cost than ais
but works efficiently
gis requres very less land when compared with ais
these are some differences there are many
but gis replaces ais in soon

what is accuracy ? in any meters , coils accuracy . how can u defined that ?

0 Answers   Adani,

how to cal calculate capacitance in DC Circuit

1 Answers  

1. alternator has full load regulation of 4% when pf of the load is 0.8 lag, 1500 rpm. full load regulation of 1400 rpm for 0.8lag will be ________ ?? 2. torque angle of a sync m/c operating from a constt voltage bus is usually defined as space angle between _______ . 3. method most effective in finding out no load losses in large DC shunt motoris ______ . 4. current carrying capacity of fuse material depends on ______ . 5. coil has res. 10 ohm, inductance 1H. what wil be current after 0.1sec after switching on to a 500V DC SUPPL ? ? 6. effect of phase lag compensation on servo systems ___________ . 7. rotor of a dc machine is usually supported upon ______ . 8. DC motor is preferred to AC motor in which application ?? 9. 3 nos of 10:1 Xmer are connected in Star-Delta to supply a load at 230V.the supply voltage must be ______ . 10. voltage source produces max current in which circuit. 11. cal. power, if current and voltage are out of phase by 90 degree. 12. suitable length of Xmission line of power at 66 KV. 13. Which of the theorm helps in simple computation when the load across a ckt is varying ?? 14. what is the adopted line length for power Xmission of power by cables ??

5 Answers   TATA,

What shall be the minimum distance to be maintained between two power cable in a common trench?

3 Answers  

What is power factor?How to improve power factor

2 Answers   Tech Mahindra,

what is REF relay?

1 Answers  

How to increase solar cell efficiency ?

1 Answers  

One of our gas turbine generator unit "1st stage rotor ground fault" alarm was occured several times. we tried to measure some voltage vulue ground fault protection relay (UNS3020a made by ABB and we measured the value of: Ground: 0.9VDC 5V: 5.8VDC 24V: 23VDC u+: 300 – 350mVAC Rf1: 17.5mVAC Rf2: 17.6mVAC The unit still running and the alarm was reset. As of 6pm yesterday and unitl now no alarm happened again. I our protection relay was defective?

1 Answers  

What Is Transformer Impedance ?

6 Answers   Con Edison,

why is power supplied in 3 phase only? why not in 2 or 4 phases?

11 Answers  

What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

0 Answers  

define electrical field?

6 Answers   L&T,