16.4.7.8 Circuit breaker gas pressure indication
The circuit breaker gas pressure indication subfunction monitors the gas pressure
inside the arc chamber. The operation is described in Figure 436.
PRESLO
BLOCK
BLKALM
PRESALM
GPRESALM
GPRESLO
t
tDGasPresAlm
t
tDGasPresLO
AND
AND
IEC12000622 V3 EN
Figure 436: 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
Table 662: 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
CB Contact Travel Time,
opening and closing
±3 ms
Remaining Life of CB ±2 operations
Accumulated Energy ±1.0% or ±0.5 whichever is
greater
1MRK502052-UEN B Section 16
Monitoring
909
Technical manual
To Next Page
Loading...
