Alarm limit check
If the time taken by the spring to charge is more than the value set with the
SpChAlmTime
setting,
the subfunction generates the SPCHALM alarm.
It is possible to block the SPCHALM alarm signal by activating the BLKALM binary input.
16.4.7.8 Circuit breaker gas pressure indication
GUID-9D070D52-B499-4D45-9195-60181819184E v9
The circuit breaker gas pressure indication subfunction monitors the gas pressure inside the arc
chamber. The operation is described in Figure 554.
PRESLO
BLOCK
BLKALM
PRESALM
GPRESALM
GPRESLO
AND
AND
0
tDGasPresAlm
0
tDGasPresLO
ANSI12000622 V1 EN-US
Figure 554: Functional module diagram for circuit breaker gas pressure indication
When the PRESALM binary input is activated, the GPRESALM output is activated after a time delay
set with the
tDGasPresAlm
setting. The GPRESALM alarm can be blocked by activating the BLKALM
input.
If the pressure drops further to a very low level, the PRESLO binary input goes high, activating the
lockout alarm GPRESLO after a time delay set with the
tDGasPresLO
setting. The GPRESLO alarm
can be blocked by activating the BLKALM 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 BLKALM.
16.4.8 Technical data
GUID-B6799420-D726-460E-B02F-C7D4F1937432 v9
Table 769: SSCBR Technical data
Function Range or value Accuracy
Alarm level for open and close travel
time
(0 – 200) ms ±3 ms
Alarm level for number of
operations
(0 – 9999) -
Independent time delay for spring
charging time alarm
(0.00 – 60.00) s ±0.2% or ±30 ms whichever is
greater
Independent time delay for gas
pressure alarm
(0.00 – 60.00) s ±0.2% or ±30 ms whichever is
greater
Independent time delay for gas
pressure lockout
(0.00 – 60.00) s ±0.2% or ±30 ms whichever is
greater
Table continues on next page
1MRK 502 066-UUS B Section 16
Monitoring
1059
Technical manual
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