ABB REL650 Technical Manual page 644

Section 14
Monitoring
14.11.6.1
638
• applicable to very long time accumulation (≤99999.9 hours)
• output ACC_HOUR presents accumulated value in hours and ACC_DAY
presents accumulated value in days
• accumulated value is retained in a non-volatile memory
• any retained value is used as initiation value for the integration following
by a restart
• RESET: Reset of the accumulated value. Consequently all other outputs are
also reset
• independent of the input IN value
• reset the value of the nonvolatile memory to zero.
Note that the nonvolatile memory will not reset to zero if the input IN is
high during the reset.
• reset can be made by activation of input RESET or from LHMI or with
IEC 61850 command
• ADDTIME: Manually add time to the currently accumulated time
• 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
1MRK 506 382-UEN A
GUID-B6FBEFD7-17C8-41C6-B5D5-32E1205E6752 v1
Line distance protection REL650 2.2 IEC
Technical manual