Operation Accuracy - ABB REL650 series Technical Manual

Line distance protection
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1MRK 506 335-UUS A
13.10.6.1
13.10.6.2
13.10.7
Technical manual
tAlarm and tWarning are user settable limits. They are also independent, that is, there is
no check if tAlarm > tWarning.
tAlarm and tWarning are possible to be defined with a resolution of 10 ms, depending on
the level of the defined values for the parameters.
tOverflow is for the overflow supervision with a default value tOverflow = 999 999.9
seconds. The outputs freeze if an overflow occurs.

Operation Accuracy

The accuracy of TEIGGIO depends on essentially three factors
task cycle time
the pulse length
the number of pulses, that is the number of rising and falling flank pairs
In principle, a shorter task cycle time, longer integrated time length or more pulses may
lead to reduced accuracy.
Memory storage
The value of the integrated elapsed time is retained in a non-volatile memory, only if any
warning, alarm or/and overflow occurs. Consequently there is a risk of data loss in the
integrated time at a power failure.
Technical data
Table 419:
TEIGGIO Technical data
Function
Elapsed time integration
5
20
100
Cycle time (ms)
Range or value
0 ~ 999999.9 s
0 ~ 999999.9 s
0 ~ 999999.9 s
Section 13
Logic
Accuracy
±0.05% or ±0.01 s
±0.05% or ±0.04 s
±0.05% or ±0.2 s
573

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