A071105 V2 EN
Figure 332: Functional module diagram for calculating inactive days and alarm
for circuit breaker operation monitoring
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 INA_DAYS is available in the monitored data view. It is also
possible to set the initial inactive days with the Ini inactive days parameter.
Alarm limit check
When the inactive days exceed the limit value defined with the Inactive Alm days
setting, the MON_ALM alarm is initiated. The time in hours at which this alarm is
activated can be set with the Inactive Alm hours parameter as coordinates of UTC.
The alarm signal MON_ALM can be blocked by activating the binary input BLOCK.
7.1.4.3 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 with a module diagram. All the modules in the
diagram are explained in the next sections.
A071106 V3 EN
Figure 333: Functional module diagram for breaker contact travel time
Traveling time calculator
The contact travel time of the breaker 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 7 1YHT530004D05 D
Condition monitoring functions
610 615 series
Technical Manual
To Next Page
Loading...
