ABB Relion 650 Series Applications Manual page 194

Section 11
Logic
11.9.3 Setting guidelines
The settings
resolution of the settings depends on the level of the values defined.
A resolution of 10 ms can be achieved when the settings are defined within the range
1.00 second ≤ tAlarm ≤ 99 999.99 seconds
1.00 second ≤ tWarning ≤ 99 999.99 seconds.
If the values are above this range the resolution becomes lower
99 999.99 seconds ≤ tAlarm ≤ 999 999.9 seconds
99 999.99 seconds≤ tWarning ≤ 999 999.9 seconds
tOverflow is for overflow supervision with a default value tOverflow = 999 999.9 seconds. The
outputs freeze if an overflow occurs.
188
tAlarm and tWarning are user settable limits defined in seconds. The achievable
tAlarm and tWarning are independent settings, that is, there is no check
Note that
tAlarm > tWarning .
if
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