Description
36/214 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • 861-9601.9
Characteristics of gas
pressure - temperature
The characteristics of the gas pressures as a function of temperature show the behavior of
the SF
6
gas at different gas filling levels depending on the ambient air temperature.
Depending on the age and configuration of the switchgear, there may be deviations from
the characteristics shown above.
Gas leakage rate The gas leakage rate is < 0.1% per year (referred to the absolute gas pressure).
Busbar housing
Rated busbar current A 1250
2000
2500
5000
3150
4000
Rated lightning impulse withstand voltage kV ≤ 170 > 170 all
Rated short-duration power-frequency
withstand voltage
kV ≤ 70 > 70 all
Rated functional level kPa 70 120
Min. functional level
1
1
Min. functional level at which the rated insulation levels are accomplished.
kPa 50 100
Signal "pressure low" kPa 50 100
Signal "pressure very low" kPa 40 90
Max. functional level kPa 120 180
Signal "pressure rising" kPa 120 180
Circuit-breaker housing
Rated busbar current A ≤ 1250 > 1250
Rated lightning impulse withstand voltage kV ≤ 170 > 170 all
Rated short-duration power-frequency
withstand voltage
kV ≤ 70 > 70 all
Rated functional level kPa 70 120
Min. functional level
1
1
Min. functional level at which the rated insulation levels are accomplished.
kPa 50 100
Signal "pressure low" kPa 50 100
Signal "pressure very low" kPa 40 90
Max. functional level kPa 120 180
Signal "pressure rising" kPa 120 180
Fig. 16: Characteristics of gas pressure as a function of
temperature
①
120kPa/20°C
②
70 kPa/20 °C
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