Operation Accuracy - ABB RES670 Technical Manual

1MRK 511 408-UUS A
15.15.6.1
15.15.6.2
15.15.7
Phasor measurement unit RES670 2.2 ANSI
Technical manual
• overflow if output ACCTIME >999999.9 seconds
• alarm if ACCTIME > tAlarm
• warning if ACCTIME > tWarning
The ACCTIME output represents the integrated time in seconds while tOverflow,
tAlarm and tWarning are the time limit parameters in seconds.
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.
The limit for the overflow supervision is fixed at 999999.9 seconds. The outputs freeze
if an overflow occurs.

Operation accuracy

The accuracy of TEIGAPC depends on essentially three factors
• function cycle time
• the pulse length
• the number of pulses, that is, the number of rising and falling flank pairs
In principle, a shorter function 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.
Technical data
Table 352: TEIGAPC Technical data
Function
Elapsed time integration 3
8
100
Cycle time (ms) Range or value
0 ~ 999999.9 s
0 ~ 999999.9 s
0 ~ 999999.9 s
Section 15
Logic
GUID-E0772193-9F6E-43DA-B642-2923565E5D4C v3
GUID-6FDD6590-30F9-4CC1-AC9D-945544AB8688 v3
GUID-B258726E-1129-47C9-94F9-BE634A2085FA v3
Accuracy
±0.2% or ±20 ms
whichever is greater
±0.2% or ±100 ms
whichever is greater
±0.2% or ±250 ms
whichever is greater
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