Table 22:
Possible date values for DST change on Sunday
Day of the DST shift
DST on/off date (day)
First Sunday of the month
1
Second Sunday of the month
8
Third Sunday of the month
15
Fourth Sunday of the month
22
Last Sunday, if the month has 30 days
24
Last Sunday, if the month has 31 days
25
For example, if DST on time shift occurs on the last Sunday in March, at 03:00
local time and DST off time shift occurs on the last Sunday in October, at 04:00
local time, the settings are the following.
DST on time (hours):
3 h
DST on time (minutes):
0 min
DST on date (day):
25
DST on date (month):
March
DST on day (weekday):
Sunday
DST off time (hours):
4 h
DST off time (minutes):
0 min
DST off date (day):
25
DST off date (month):
October
DST off day (weekday):
Sunday
Set the
DST on day (weekday)
and
DST off day (weekday)
to
"reserved" 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 in use
parameter to "False".
7.5
Testing of protection relay operation
The protection relay has to be in the test mode before the digital outputs and certain
output signals of protection and other functions can be activated.
Section 7
1MRS759118 A
Commissioning
116
REX640
Operation Manual
