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Installation
Checking the gas pressure
Leakage test
Checking the gas quality
Monitoring the gas
pressure
128/214
29
Tests
29.1
Checking the SF
DANGER
Operation with an incorrect SF
➭ Do not put the switchgear into operation with too high or too low SF
Before commissioning or a rated short-duration power-frequency withstand voltage test,
the gas pressures of all gas compartments must be checked.
➭ On all gas compartments filled at site: After having filled the gas compartments, observe a
temperature compensation time of 24 hours. Do not check the gas pressure before that
time.
➭ Check the gas pressure in all gas compartments filled at site. If the limit values adjusted on
the indicators are underflown or exceeded, correct the gas pressure.
➭ 24 hours after having filled the gas compartments, check all flange connections mounted at
site and all SF
pipes for leaks.
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➭ For leak detection, use an SF
➭ In case of gas leaks, these points must be disassembled and sealed again.
➭ Check the gas quality 24 hours after filling the gas compartments.
➭ Determine the maximum dew point with a gas hygrometer.
Dew-point temperature: -15
➭ Check the air content in the SF
Maximum air content: 5%.
➭ If the gas quality is not achieved, the gas filling must be cleaned with the maintenance unit.
➭ After commissioning, check the gas pressures daily for a period of two weeks. If the gas
pressures drop within this period of time, please inform the Siemens representative.
➭ After this period of time, check the gas pressures according to the maintenance instructions.
Revision 06 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • 864-5091.9
gas filling
6
gas pressure can destroy parts of the switchgear.
6
leak detector.
6
o
C.
gas with a gas-percentage meter.
6
gas pressures.
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