ABB RELION REX640 Technical Manual page 1363

1MRS759142 F
Alarm limit check
When the inactive days exceed the limit value defined with the
setting, the MON_ALM alarm is initiated. The time in hours at which this alarm is
activated can be set with the
The alarm signal MON_ALM can be blocked by activating the binary input BLOCK.
7.1.5.3 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.
Figure 774: Functional module diagram for breaker contact travel time
Traveling time calculator
The travel time can be calculated using two different methods based on the setting
Travel time Clc mode .
When the setting
of the breaker is calculated from the time between auxiliary contacts' state change.
The opening travel time is measured between the opening of the POSCLOSE auxiliary
contact and the closing of the POSOPEN auxiliary contact. The travel time is also
measured between the opening of the POSOPEN auxiliary contact and the closing of
the POSCLOSE auxiliary contact.
Figure 775: Travel time calculation when Travel time Clc mode is "From Pos to Pos"
There is a time difference t
the opening of the POSCLOSE auxiliary contact. Similarly, there is a time gap t
REX640
Technical Manual
Inactive Alm hours parameter as coordinates of UTC.
Travel time Clc mode is "From Pos to Pos", the contact travel time
between the start of the main contact opening and
1
Condition monitoring functions
Inactive Alm days
2
1363