Ground-Fault Log - Siemens SIPROTEC 5 V7.80 Operation

Operation in the Operating State
8.5 Logs
Apart from the recording of fault indications in the fault log, spontaneous display of fault indications of the
last fault on the device display is also done. You will find details about this in chapter
Display on the On-Site Operation
Deletability
The fault log of your SIPROTEC 5 device can be deleted. You will find details about this in chapter
8.5.12 Saving and Deleting the
Reading on the Device through the On-Site Operation Panel
•
To reach the fault log from the main menu, use the navigation keys of the on-site operation panel.
Main Menu → Indications → Fault logs
•
You can navigate within the displayed indication list using the navigation keys (up/down) on the on-site
operation panel.
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Figure 8-17
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.
8.5.4

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.
140
Panel.
Logs.
Reading the Fault Log on the On-Site Operation Panel of the Device
8.4.6 Spontaneous Fault
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-9, Edition 06.2018