Gas Pressure Supervision - ABB REG650 Technical Manual

Section 14
Monitoring
14.17.7.8
572
Alarm limit check
If the time taken by the spring to charge is more than the value set with the
tSprngChrgAlm setting, the subfunction generates the SPRCHRAL alarm.
It is possible to block the SPRCHRAL alarm signal by activating the BLOCK binary
input.

Gas pressure supervision

The gas pressure supervision subfunction monitors the gas pressure inside the arc
chamber.
The operation of the subfunction can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
GUID-A913D2D7-398B-41F6-9B21-BBCECD3F596D V1 EN
Figure 274: Functional module diagram for circuit breaker gas pressure alarm
The gas pressure is monitored through the binary input signals LOPRES and
ALMPRES.
Pressure alarm time delay
When the ALMPRES binary input is activated, the PRESALM alarm is activated after
a time delay set with the tPressAlm setting. The PRESALM alarm can be blocked by
activating the BLOCK input.
If the pressure drops further to a very low level, the LOPRES binary input becomes
high, activating the lockout alarm PRESLO after a time delay set with the TPressLO
setting. The PRESLO alarm can be blocked by activating the BLOCK input.
The binary input BLOCK can be used to block the function. The activation of the
BLOCK input deactivates all outputs and resets internal timers. The alarm signals from
the function can be blocked by activating the binary input BLK_ALM.
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Technical manual