COMMISSIONING
56 / 146 OI 250 (EN) REV7 /REV6
7.3 Filling the Breaker with Gas
As an option, the circuit breaker may be equipped with a separate
density monitor for each pole. The respective operations must then
be carried out for each pole.
• Connect the filling hose of the gas-filling device (gas cylinder with
pressure-reducing valve or gas handling cart) to the central
supply connection (DILO DN8 coupling).
• Fill the circuit breaker gradually until rated pressure is reached.
Never set the pressure-reducing valve higher than the rated
breaker pressure.
• After a temperature equalization period of approximately 1 hour,
check the gas pressure again and correct it, if necessary.
• Check all gas piping seals for leaks using a leak detector.
• Screw on the protective cap for the central supply connection.
SF
6
pressure curve -25°C
(ND=0.74 MPa [p
e
] / UW1=0.64 MPa [p
e
] / UW2=0.61MPa [p
e
])
All pressure specifications are given in terms of relative pressure
(p
e
).
3,5
4,0
4,5
5,0
5,5
6,0
6,5
7,0
7,5
-40 -30 -20 -10 0 10 20 30 40 50
t / °C
p_rel / bar
Liquid Gaseous
(1)
(4)
(2)
(3)
(1)=Nominal Density 48,77 g/L
(2)=Alarm Density 41,58 g/L
(3)=Lockout Density 39,46 g/L
(4)=Liquifaction Curve
1 Rated pressure curve -
2 Alarm pressure curve -
3 Lockout pressure curve -
4SF
6
liquefaction curve -
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