Settings File Traceability - GE T35 Instruction Manual

ENERVISTA SOFTWARE INTERFACE
2. Enter the serial number of the T35 device to lock to the settings file in the Serial Lock field.
3. Click the OK button to apply the change.
The settings file and corresponding secure FlexLogic equations are now locked to the T35 device specified by the serial
number.

4.1.9 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 computer. This
information 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.
4
With respect to the figure, the traceability feature is used as follows.
1. The transfer date of a settings file written to a T35 is logged in the relay and can be viewed in the EnerVista software
or the front panel display. Likewise, the transfer date of a settings file saved to a local computer is logged in the
EnerVista software.
2. Comparing the dates stored in the relay and on the settings file at any time in the future indicates if any changes have
been made to the relay configuration since the settings file was saved.
4.1.9.1 Settings file traceability information
The serial number and file transfer date are saved in the settings files when they are sent to a T35 device.
The T35 serial number and file transfer date are included in the settings file device definition within the EnerVista UR Setup
offline window as shown in the example.
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Figure 4-13: Settings file traceability
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: INTERFACES