The "voltage versus electrode gap-distance" test results are tabulated in Table Q4 for different insulators under high voltage condition. Table Q4. 1 2 3 4 SF6 Read No. • Dry air N₂ Gap Distance in mm 11 17 25 35 SF6 Voltage in kV 23 37 45 50 N₂ Voltage in kV 10 15 20 25 Dry-Air Voltage in kV 13 22 29 30 = 1 bar Determine the breakdown strength under 100 kPa pressure for the three different gases. Plot the voltage versus gap distance for the three different gases and select the best insulating gas, which is required operating at the Gap Distance of 25mm. Explain how, the dielectric stress of each gas varies when the pressure in the chamber increases from 100 kPa to 300 kPa and identify the approximate range of maximum pressure limit in the chamber.

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The "voltage versus electrode gap-distance" test results are tabulated in
Table Q4 for different insulators under high voltage condition.
Table Q4.
2
3
4
SF6
Read
No.
Dry air
N₂
iii)
Gap
Distance
in mm
17
25
35
SF6
Voltage
in kV
23
37
45
50
N₂
Voltage
in kV
10
15
20
25
Dry-Air
Voltage
in kV
13
22
29
30
Ibar
Determine the breakdown strength under 100 kPa pressure for
the three different gases.
Plot the voltage versus gap distance for the three different gases
and select the best insulating gas, which is required operating at
the Gap Distance of 25mm.
O
Explain how, the dielectric stress of each gas varies when the
pressure in the chamber increases from 100 kPa to 300 kPa and
identify the approximate range of maximum pressure limit in the
chamber.
Transcribed Image Text:The "voltage versus electrode gap-distance" test results are tabulated in Table Q4 for different insulators under high voltage condition. Table Q4. 2 3 4 SF6 Read No. Dry air N₂ iii) Gap Distance in mm 17 25 35 SF6 Voltage in kV 23 37 45 50 N₂ Voltage in kV 10 15 20 25 Dry-Air Voltage in kV 13 22 29 30 Ibar Determine the breakdown strength under 100 kPa pressure for the three different gases. Plot the voltage versus gap distance for the three different gases and select the best insulating gas, which is required operating at the Gap Distance of 25mm. O Explain how, the dielectric stress of each gas varies when the pressure in the chamber increases from 100 kPa to 300 kPa and identify the approximate range of maximum pressure limit in the chamber.
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