Siemens siprotec 7SA6, Manual

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Control During Operation
7-4
7SA6 Manual
C53000-G1176-C156-2
If the DIGSI
®
4
Online
directory is opened with a double-click, the operating func-
tions for the device appear in the navigation window (Figure 7-2). By double clicking
on
Annunciation
, the tree structure expands and shows the individual message
groups. The groups are described in detail below.
System Interface The system interface (if available) is generally hardwired and transfers all device in-
formation to a master station via data cable, optical fibre cable, or modem.
Division of
Messages The messages are categorized as follows:
•
Event Log: these are operating messages that can occur during the operation of the
device. They include information about the status of device functions, measurement
data, system data, and similar information.
•
Trip Log: these are fault messages from the last eight network faults that were proc-
essed by the device.
•
Sensitive Earth Fault Log: Earth fault messages, if the device has sensitive earth
fault detection. For networks with non-earthed star-point or star-point earthed by a
Peterson coil.
•
Switching statistics; these values include a counter for the trip commands initiated
by the device, accumulated currents interrupted by the individual poles of the circuit
breaker.
•
Erasing and setting the messages named above.
A complete list of all message and output functions that can be generated by the de-
vice, with the associated information number (FNo), can be found in the Appendix.
The lists also indicate where each message can be sent. The lists are based on a
SIPROTEC
®
4 device with the maximum complement of functions. If functions are not
present in the specific version of the device, or if they are set as “
Disabled
” in device
configuration, then the associated messages cannot appear.