Inactivity timer
The module calculates the number of days the circuit breaker has remained inactive,
that is, has stayed in the same open or closed state. The calculation is done by
monitoring the states of the
POSOPEN
and
POSCLOSE
auxiliary contacts.
The inactive days
NOOPRDAY
is available through the Monitored data view. It is also
possible to set the initial inactive days by using the
InactDayInit
parameter.
Alarm limit check
When the inactive days exceed the limit value defined with the
InactDayAlm
setting,
the
NOOPRALM
alarm is initiated. The time in hours at which this alarm is activated
can be set with the
InactHourAlm
parameter as coordinates of UTC. The alarm signal
NOOPRALM
can be blocked by activating the binary input
BLOCK
.
14.17.7.3
Breaker contact travel time
The breaker contact travel time module calculates the breaker contact travel time for
the closing and opening operation. The operation of the breaker contact travel time
measurement can be described by using a module diagram. All the modules in the
diagram are explained in the next sections.
GUID-4D82C157-53AF-40C9-861C-CF131B49072B V1 EN
Figure 268:
Functional module diagram for breaker contact travel time
Travelling time calculator
The breaker contact travel time is calculated from the time between auxiliary contacts'
state change. The open travel time is measured between the opening of the
POSCLOSE
auxiliary contact and the closing of the
POSOPEN
auxiliary contact.
Travel time is also measured between the opening of the
POSOPEN
auxiliary contact
and the closing of the
POSCLOSE
auxiliary contact.
Section 14
1MRK 502 048-UEN A
Monitoring
566
Technical manual
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