3 Mounting and Commissioning
402
7SA522 Manual
C53000-G1176-C155-3
WARNING!
Warning of dangers evolving from improper primary tests
Non-observance of the following measure can result in death, personal injury or sub-
stantial property damage.
Primary tests may only be carried out by qualified persons who are familiar with com-
missioning protection systems, with managing power systems and the relevant safety
rules and guidelines (switching, earthing etc.).
3.3.1 Test Mode/Transmission Block
Activation and
Deactivation
If the device is connected to a central control system or a server via the SCADA inter-
face, then the information that is transmitted can be modified with some of the proto-
cols available (see Table “Protocol-dependent functions” in the Appendix A.5).
If Test mode is set ON, then a message sent by a SIPROTEC
®
4 device to the main
control system has an additional test bit. This bit allows the message to be recognized
as resulting from testing and not an actual fault or power system event. Furthermore,
it can be determined by activating the Transmission block that no annunciations at
all are transmitted via the system interface during a test mode.
The SIPROTEC
®
4 System Description describes in detail how to activate and deac-
tivate test mode and blocked data transmission (Order no. E50417-H1176-C151).
Note that when DIGSI
®
is being used, the program must be in the Online operating
mode for the test features to be used.
3.3.2 Checking Time Synchronization
If external time synchronization sources are used, the data of the time source (antenna
system, time generator) are checked (see Subsection 4 at “Time Synchronization”). A
correct function (IRIG B, DCF77) is recognized in such a way that 3 minutes after the
startup of the device the clock status is displayed as “synchronized”, accompanied by
the message “Alarm Clock OFF”.
Table 3-14 Time status
No. Status text Status
1 – – – – – – – –
synchronized
2 – – – – – – SZ
3 – – – – ST – –
not synchronized
4 – – – – ST SZ
5 – – UG ST – –
6 – – UG – – – –
Legend:
– – UG – – – –
– – – – ST – –
– – – – – – SZ
time invalid
time fault
summertime
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