ABB 615 Series ANSI, Technical Manual

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Section 6
1MAC050144-MB C
Supervision functions
424 615 series ANSI
Technical Manual
Figure 220: Functional module diagram for circuit breaker spring charged indication
and alarm
Spring charge time measurement
Two binary inputs,
SPR_CHR_ST
and
SPR_CHR
, 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
T_SPR_CHR
is available through the Monitored data view on
the LHMI or through tools via communications.
Alarm limit check
If the time taken by the spring to charge is more than the value set with the Spring charge
time setting, the subfunction generates the
SPR_CHR_ALM
alarm.
It is possible to block the
SPR_CHR_ALM
alarm signal by activating the
BLOCK
binary
input.
6.1.4.8 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.
Figure 221: 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.