Siemens 8DA10 Series Installation And Operating Instructions Manual page 36

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