Gas Pressure Supervision - ABB 615 series Technical Manual

1MAC059074-MB A
7.1.4.8
7.1.5
615 series ANSI
Technical Manual
It is possible to block the SPR_CHR_ALM 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 with a module diagram. All the modules
in the diagram are explained in the next sections.
A071113 V2 EN
Figure 464: 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.
Application
52CM 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.
Condition monitoring functions
Section 7
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