3.3 Commissioning
293
7SD610 Manual
C53000-G1176-C145-4
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 De-
activation
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
system has an additional test bit. This bit allows the message to be recognized as re-
sulting from testing and not an actual fault or power system event. Furthermore it can
be determined by activating the Transmission block that no indications at all are
transmitted via the system interface during test mode.
The SIPROTEC 4 System Description describes how to activate and deactivate test
mode and blocked data transmission. 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 Test Time Synchronisation Interface
If external time synchronization sources are used, the data of the time source (antenna
system, time generator) are checked (see Section 4 under „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 indication „Alarm Clock OFF“. For further information please refer to the
SIPROTEC System Description.
Table 3-14 Time status
No. Status text Status
1 – – – – – – – –
synchronized
2 – – – – – – ST
3 – – – – ER – –
not synchronized
4 – – – – ER ST
5 – – NS ER – –
6 – – NS – – – –
Legend:
– – NS – – – –
– – – – ER – –
– – – – – – ST
time invalid
time fault
summertime
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