Operation Accuracy - ABB Relion 650 Series Technical Manual

Section 10
Monitoring
10.11.6.1
10.11.6.2
456
• the amount of time to be added is defined by a setting tAddToTime
• time is added through activation of input ADDTIME or from LHMI or
with IEC 61850 command
• BLOCK: Freeze the accumulation and block/reset the other outputs
• independent of the input IN value
• BLOCK request overrides RESETrequest
• Monitor and report the conditions of limit transgression
• overflow if output ACC_HOUR > 99 999.9 hours
• alarm if output ACC_HOUR > tAlarm
• warning if output ACC_HOUR > tWarning
The ACC_HOURoutput represents the accumulated time in hours and the
ACC_DAY output represents the accumulated time in days.
tAlarm and tWarning are user settable time limit parameters in hours. They are also
independent of each other, that is, there is no check if tAlarm > tWarning.
tAddToTime is a user settable time parameter in hours.
tAlarm, tWarning and tAddToTime are possible to be defined with a resolution of
0.1 hours (6 minutes).
The limit for the overflow supervision is fixed at 99999.9 hours. The outputs will
reset and the accumulated time will reset and start from zero if an overflow occurs.

Operation accuracy

The accuracy of TEILGAPC depends on essentially two factors
• the pulse length
• the number of pulses, that is, the number of rising and falling flank pairs
In principle, more pulses may lead to reduced accuracy.
Memory storage
The value of the accumulated time is retained in a non-volatile memory,
• at every falling edge of the input IN
• at every even 6 minutes, after a rising edge of the input IN
• after a manual addition of time
Consequently in case of a power failure, there is a risk of losing the difference in
time between actual time and last time stored in the non-volatile memory.
1MRK 511 424-UEN B
GUID-B6FBEFD7-17C8-41C6-B5D5-32E1205E6752 v1
GUID-B49698FF-0AB2-4792-A7CB-5534313B6CA0 v2
Bay control REC650 2.2 IEC
Technical manual