Tests; Checking The Sf6 Gas Filling; Monitoring The Gas Pressure - Siemens 8DA10 Series Installation And Operating Instructions Manual

Checking the gas pressure
Leakage test
Checking the gas quality
Monitoring the gas
pressure
861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11
28

Tests

28.1 Checking the SF
Insufficient gas filling can cause injury or property damage.
Operating the switchgear without service readiness due to insufficient gas filling can
cause injury and the destruction of parts of the switchgear.
➭ Before performing any switching operation, check the gas pressure in the compartments
pre-filled at the factory on the associated gas pressure indicators. The values must not drop
below the temperature-dependent limit values.
➭ Do not install, commission or operate a switchgear with incorrect or too low SF
pressures. If required, isolate the switchgear and put it out of service.
➭ Inform the competent regional Siemens representative.
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 gas pressure is lower or
higher than the limit values adjusted on the indicators, 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.
6
➭ 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 °C.
➭ 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.
28.2

Monitoring the gas pressure

Insufficient gas filling can cause injury or property damage.
Operating the switchgear without service readiness due to insufficient gas filling can
cause injury and the destruction of parts of the switchgear.
➭ Before performing any switching operation, check the gas pressure in the compartments
pre-filled at the factory on the associated gas pressure indicators. The values must not drop
below the temperature-dependent limit values.
➭ Do not install, commission or operate a switchgear with incorrect or too low SF
pressures. If required, isolate the switchgear and put it out of service.
➭ Inform the competent regional Siemens representative.
The perfect functioning of the switchgear is only guaranteed if the gas pressure indication of
the manometer is between the minimum and the maximum functional level (see page 35,
"Insulating gas").
gas filling
6
CAUTION
leak detector.
6
gas with a gas-percentage meter.
6
CAUTION
Installation
gas
6
gas
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