Ground-Fault Log - Siemens SIPROTEC 5 Operation Manual

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Figure 8-12
Configurability
The indication scope of the fault log is configured in a specifically defined column of the information routing
(matrix) of DIGSI 5:
Target → Log → Fault log column
Selected application templates and functions from the library already bring a predefined set of operational
indications with them which you can adjust individually at any time.
The operational measured values and the measured values of the fundamental components and symmetrical
components (see Equipment Manual) are calculated every 9 cycles (at 50 Hz, this is every 180 ms). However,
this can mean that the data are not synchronized with the sampled values of the analog channels. The
recording of these measured values can be used to analyze the slowly changing processes.
8.4.5.4

Ground-Fault Log

Ground-fault indications are events which arise during a ground fault. They are logged in the ground-fault log
with real-time stamp and relative-time stamp (reference point: ground-fault occurrence) . Ground faults are
numbered consecutively in rising order. A maximum of 10 ground-fault logs are stored and for each ground-
fault log, it is guaranteed that at least 100 indications are recorded.
The following functions can start the logging of a ground fault with the raising ground-fault indication:
•
Directional sensitive ground-fault protection for deleted and isolated systems (67Ns)
•
Sensitive ground current protection with I0 (50Ns/51Ns)
•
Intermittent ground-fault protection
The logging ends with the going ground-fault indication.
Reading from the PC with DIGSI 5
•
To reach the ground-fault log of your SIPROTEC 5 device, use the project-tree window.
Project → Device → Process data → Logs → Ground-fault log
The status of the device-diagnosis log last loaded from the ground-fault log is shown to you.
•
To update (synchronization with the device) click the button Read log entries in the headline of the indi-
cation list (Figure 8-13
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-7, Edition 06.2016
Reading the Fault Log on the On-Site Operation Panel of the Device
a)).
Operation in the Operating State
8.4 Indications
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