Areva WSB - Pressure Gauge; Igis

17
4.3 IGIS
IGIS measures the pressure of an
integrated gas compartment and the
temperature within the switchgear
room in order to determine the tem-
perature-compensated insulating gas
pressure.
This temperature-compensated insu-
lating gas pressure is the insulating
gas pressure at a switchgear com-
partment temperature of 20 °C. In
line with the concept of integrated
gas compartments, it is a measure
which indicates the insulating level of
the switchgear.
The number of the channels for the
pressure transmitters and the confi-
gured pickup values are specifically
designed for the corresponding gas-
insulated switchgear.
Wichtig!
Comply with the IGIS
Operating Manual,
AGS 531 741-01.
4.2 Pressure gauge
The pressure indication on the pres-
sure gauge is ambient-temperature
compensated, i.e. the pressure indi-
cated corresponds to a temperature
of 20°C in the switchroom. The
pressure indication remains constant
if the operating mode remains
unchanged, even if the temperature
in the switchgear room changes.
1
2
3
4
1
2
1
2
Fig. 4.2
Insulating gas monitoring with individual monitoring of the circuit-breaker compartments and
integrated monitoring of the busbar compartment (example)
1 Pressure gauge for circuit-breaker compartment
2 Gas connector socket for circuit-breaker compartment M24 x 1.5 (DIN6)
3 Pressure gauge for busbar compartment
4 Gas connector socket for busbar compartment M24 x 1.5 (DIN6)
P2
P3
P1
Test
P1
P2
P3
P<
bar
I G I S
P1
1
2
3
4
Fig. 4.3
1 Busbar compartment 2
2 Busbar compartment 1
3 Circuit-breaker compartments
4 IGIS
Gas-tight electrical bushing
Pressure transmitter
Check valve
Double check valve
Gas connector
Fig. 4.1
Indicator 1 Pressure gauge
1 Signalling contact 1
2 Signalling contact 2
3 Pressure indication
3
2
1
Signalling contact Switching function
1 closes if pre-alarm is reached during drop in pressure
2 closes if main alarm is reached during drop in pressure