ABB RELION 620 Series Operation Manual page 138

Section 8
Commissioning
130
The DST on/off date must precede the selected DST on/off day and be within the
same week as the DST shift.
Table 28: Possible date values for DST change on Sunday
Day of the DST shift
First Sunday of the month
Second Sunday of the month
Third Sunday of the month
Fourth Sunday of the month
Last Sunday, if the month has 30 days
Last Sunday, if the month has 31 days
For example, if the DST is observed from the last Sunday in March to the last Sunday
in October and the time shift occurs at 01:00 UTC, the setting parameters are the
following.
DST on time:
DST on date:
DST on day:
DST off time:
DST off date:
DST off day:
Set the DST on day and DST off day to "not in use" to determine the exact
date and time for the DST shift. Repeat the setting yearly, as the time for
the DST shift is not on the same date every year.
To disable the DST, set the DST offset parameter to "0 min".
DST on/off date (dd)
1
8
15
22
24
25
01:00
25.03
Sun
01:00
25.10
Sun
1MAC456939-IB D
620 series ANSI
Operation Manual