ABB REB650, Technical Manual

Page: 337 / 504

Spring charge time measurement
Two binary inputs,
SPRCHRGN
and
SPRCHRGD
, indicate spring charging started and
spring charged, respectively. The spring charging time is calculated from the difference
of these two signal timings.
The spring charging time
SPRCHRT
is available through the Monitored data view .
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.
12.17.7.8 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.
ALMPRES
LOPRES
PRESLO
PRESALM
BLOCK
BLK_ALM
0
0-tPressAlm
0
0-TPressLO
ANSI11000293-1-en.vsd
ANSI11000293 V1 EN
Figure 137: 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.
1MRK 505 277-UUS C
Section 12
Monitoring
331
Technical Manual