IG-322-EN version 03; 22/07/2022
26
Technical description
General instructions
SF
6
-insulated circuit-breaker panel:
Type
gae
.630 -1LSV(G)-/5/
in modular extensible design up to 24 kV, 20 kA
4.3. Gas tank
The gas tank is made of stainless steel. A prerequisite to the
safe function of the switchgear over many years of service
is guaranteed by optimum production of the mechanical
parts and leak tightness of the tank
The gas-tightly welded tank is checked for leaks in
accordance with IEC 62271-200 (permissible leakage rate
10
-7
mbar x l/s).
The gas tank contains the vacuum circuit breaker, which
is connected in series with the three-position switch. The
bushings for the busbars are located on the side of the tank
and are connected to the vacuum circuit-breaker inside the
tank by means of copper busbars. The three-position switch
also connects the cable bushings to the circuit-breaker by
means of copper busbars.
The power cables are connected to resin bushings with
outer taper type C in accordance with DIN 47636 Parts 1
and 3.
The bushings are checked for compliance with the
maximum permissible partial discharge values.
Bushings, sealing flange for actuating shaft and bursting
plate are sealed towards the tank by means of sealing
rings. The three-position switch’s actuating shaft is fitted
to the tank with twin paired radial shaft seals. The force is
transmitted to the circuit-breaker by way of stainless steel
bellows, which moves between the two operating points
“ON” and “OFF”.
The tank in each circuit-breaker panel is charged with dry
SF
6
gas after evacuation. The addition of Al
2
O
3
absorbs the
slightest amount of moisture and continually regenerates
the SF
6
gas.
4.4. Pressure indicator
A pressure indicator (Figure 4.3) displays the filling pressure
in the gas tank. The pressure indicator is connected to the
gas tank via a check valve.
The temperature compensation curve divides the pressure
indicator scale into the two areas RED and GREEN.
0,6 bar
-25°
C
0°C
+20°
C
+40°
C
12258533 11 14
1
2
3
4
1
Temperature compensation curve
2
RED
3
Temperature ring
4
GREEN
Figure 4.3.
Summary of Contents for ORMAZABAL gae.630
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