Test Mode / Transmission Block; Test Time Synchronisation Interface - Siemens SIPROTEC 7UT613 series Manual

3 Mounting and Commissioning
3.3.1

Test Mode / Transmission Block

3.3.2

Test Time Synchronisation Interface

380
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.).
If the device is connected to a station control system or a server, the user is able to
modify, in some protocols, information that is transmitted to the substation (see Table
„protocol dependent functions" in Appendix A.6).
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 allows the message to be recognised as result-
ing from testing and not actual fault or power system event. Furthermore it can be de-
termined by activating the Transmission block that no indications at all are transmit-
ted via the system interface during test mode.
The SIPROTEC 4 System Description /1/ describes how to activate and deactivate
test mode and transmission block. Note that when DIGSI is being used, the program
must be in the Online operating mode for the test features to be used.
If external time synchronisation sources are used, the data of the time source (antenna
system, time generator) are checked (see Subsection 4 „Technical Data" under „ Time
Synchronisation Interface"). A correct function (IRIG B, DCF77) is recognised in such
a way that 3 minutes after the startup of the device the clock status is displayed as
„synchronised", accompanied by the message „Alarm Clock OFF".
Table 3-23 Time Status
No.
1
2
3
4
5
6
Legend:
– – NS – – – –
– – – – ER – –
– – – – – – ST
Status Text
– – – – – – – –
– – – – – – ST
– – – – ER – –
– – – – ER ST
– – NS ER – –
– – NS – – – –
Status
Synchronised
Not synchronised
Invalid time
Clock error
Summer time
7UT613/63x Manual
C53000-G1176-C160-2