864-5091.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • Revision 06
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Description
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.
Due to the different configurations of the gas compartments, installed switchgear assemblies
may deviate from the above characteristics.
Circuit
-
breaker/disconnector housing
Rated feeder current [A] *
1250
≥ 1600
≤ 2500
Rated voltage [kV]
≤ 36
40.5
36
38
40.5
Rated lightning impulse withstand voltage
[kV]
≤ 170
185
190
200
200
200
Rated short-duration power-frequency
withstand voltage [kV]
≤ 50
65 / 70
≤ 70
85
85
80
80
80
Rated functional level [kPa]
70
120
Signal "critical functional level"
40
90
Min. functional level [kPa]
50
100
Signal "pressure too low" [kPa]
50
100
Max. functional level [kPa]
120
180
Signal "pressure too high" [kPa]
120
180
Fig. 26:
Characteristics of gas pressure as a function
of temperature
①
120 kPa/20 °
②
70 kPa/20 °
