ABB COM600 series, User'S & Technical Manual, Page: 53 / 60

functional_module_diagram_for_circuit_breaker_gas_pressure_alarm.png
Figure 5.8-1 Functional module diagram for circuit breaker gas pressure alarm
The gas pressure is monitored through the binary input signals PRES_LO_IN and
PRES_ALM_IN.
Timer 1
When the PRES_ALM_IN binary input is activated, the PRES_ALM alarm is activated
after a time delay set with the Pressure alarm time setting. The PRES_ALM alarm can
be blocked by activating the BLOCK input.
Timer 2
If the pressure drops further to a very low level, the PRES_LO_IN binary input becomes
high, activating the lockout alarm PRES_LO after a time delay set with the Pres lockout
time setting. The PRES_LO 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.
Application 5.9.
SSCBR includes different metering and monitoring subfunctions.
Circuit breaker status
Circuit breaker status monitors the position of the circuit breaker, that is, whether the
breaker is in an open, closed or intermediate position.
Circuit breaker operation monitoring
The purpose of the circuit breaker operation monitoring is to indicate that the circuit
breaker has not been operated for a long time. The function calculates the number of
days the circuit breaker has remained inactive, that is, has stayed in the same open or
closed state. There is also the possibility to set an initial inactive day.
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COM600 series 5.1 1MRS758734
Substation Analytics Technical Manual