Insulating Gas - Siemens 8DA10 Series Installation And Operating Instructions Manual

Features
Filling degree of
compressed gas cylinders
Vapor pressure over
liquid SF
Vapor pressure as a
function of temperature
Storage
Gas pressures in kPa
at 20°C
861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11
17.4

Insulating gas

The sealed pressure system of the switchgear contains the insulating gas SF
greenhouse gas, GWP 22,800).
Example for a typical amount of SF
cable connection 2 x plug size S3 with 2.8 kg SF
The respective amount of SF
Sulphur hexafluoride SF
parts between each other and against earth potential.
When several switchgear sections have to be delivered, the switchgear is delivered ex works
partly with SF filling ready for service. To fill all gas compartments completely with SF
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SF gas and a filling device must be provided on site. If the switchgear is delivered as one
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switchgear section (possible for switchgear assemblies comprising up to 4 panels), the
switchgear is delivered ex works completely with SF
provided to last the total service life of the switchgear.
Filling quantity as per rating plate.
• Non-toxic
• Odorless
• Colorless
• Non-inflammable
• Chemically neutral
• Electronegative
• Heavier than air
1.04 kg SF / liter cylinder volume (valid at a max. ambient air temperature of +65 °C).
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In the supplied cylinders, about 2/3 of the cylinder volume is liquid at +20 °C, the rest is
saturated SF vapor.
6 6
Temperature Vapor pressure
+ 20 °C 2100 kPa
+ 30 °C 2700 kPa
+ 65 °C 7000 kPa (test pressure of cylinder)
Store the cylinders in vertical position in a cool place.
All gas pressures specified are relative overpressures at an ambient air temperature of 20 °C,
and are valid for IEC, GOST and GB.
Select the gas pressure according to the higher value of the rated lightning impulse withstand
voltage or rated short-duration power-frequency withstand voltage.
gas: 8DA10 circuit-breaker panel 36 kV, 40 kA, 1250 A,
6
6
gas included is indicated on the rating plate of the switchgear.
6
according to IEC 60 376 is used as insulating gas. SF
6
INFORMATION
(CO e = 64t).
2
filling ready for service. The SF
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Description
(fluorinated
6
insulates live
6
,
6
filling is
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