GE Multilin T35 Transformer Protection System 4-11
4 HUMAN INTERFACES 4.2 EXTENDED ENERVISTA UR SETUP FEATURES
4
The following window is displayed.
Figure 4–10: TYPICAL SETTINGS FILE PROPERTIES WINDOW
3. Enter the serial number of the T35 device to lock to the settings file in the Serial # Lock field.
The settings file and corresponding secure FlexLogic equations are now locked to the T35 device specified by the serial
number.
4.2.3 SETTINGS FILE TRACEABILITY
A traceability feature for settings files allows the user to quickly determine if the settings in a T35 device have been
changed since the time of installation from a settings file. When a settings file is transferred to a T35 device, the date, time,
and serial number of the T35 are sent back to EnerVista UR Setup and added to the settings file on the local PC. This infor-
mation can be compared with the T35 actual values at any later date to determine if security has been compromised.
The traceability information is only included in the settings file if a complete settings file is either transferred to the T35
device or obtained from the T35 device. Any partial settings transfers by way of drag and drop do not add the traceability
information to the settings file.
Figure 4–11: SETTINGS FILE TRACEABILITY MECHANISM
With respect to the above diagram, the traceability feature is used as follows.
2
The serial number and last setting change date
are stored in the UR-series device.
The serial number of the UR-series device and the file transfer
date are added to the setting file when setting files
are transferred to the device.
842864A2.CDR
Compare transfer dates in the setting file and the
UR-series device to determine if security
has been compromised.
1
SETTING FILE TRANSFERRED
TO UR-SERIES DEVICE
SERIAL NUMBER AND TRANSFER DATE
SENT BACK TO ENERVISTA AND
ADDED TO SETTING FILE.
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