ABB Relion 650 Series Technical Manual page 500

Section 13
Monitoring
Alarm limit check
When the inactive days exceed the limit value defined with the
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.
13.17.7.3 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-US
Figure 256: 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.
GUID-3AD25F5A-639A-4941-AA61-E69FA2357AFE V1 EN-US
There is a time difference t
POSCLOSE auxiliary contact. Similarly, there is a time gap t
auxiliary contact opens and the main contact is completely open. Therefore, in order to
incorporate the time t
494
between the start of the main contact opening and the opening of the
1
+t , a correction factor needs to be added with 10 to get the actual opening
1 2
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InactDayAlm setting, the NOOPRALM
GUID-3AF0EE8D-AA8E-4F83-9916-61B5D0D6B05B v5
between the time when the POSOPEN
2
Line distance protection REL650
1MRK 506 326-UUS B
Technical manual