COMMISSIONING
46 OI 248 (EN) REV6 /REV7
7.2 Filling the Pole Columns with Gas (Preparation)
The rated pressure (ND) is shown on the nameplate and the densi-
ty monitor (black dot on the density monitor indicator).
If there is any doubt about the gas quality, always check it (see
“Checking the Gas Quality” on Page 71).
Contamination of breaker gas by foreign gases is not permitted.
Make sure that the filling hose is filled with SF
6
before the filling
operation. In case of doubt, purge the filling hose before the filling
operation.
The density monitor indication can be checked using a test mano-
meter and a thermometer. The indicated value of the test manome-
ter must be corrected as a function of the ambient temperature in
accordance with the SF
6
pressure curve.
The pressurized components of the pole columns can be
damaged by improper handling. If the components are damaged,
they may burst when the gas pressure is increased. This can re-
sult in serious personal injury or property damage.
Therefore:
- Inspect the pole columns visually for damage before
beginning the filling operation.
- Carry out the filling operation from a protected position.
If the rated pressure is exceeded, it may cause the pressure reli-
ef device to respond.
Therefore:
- Never set the pressure reducing valve of the gas-filling de-
vice higher than the rated breaker pressure.
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