GE T60 Instruction Manual page 283
Transformer protection system
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CHAPTER 5: SETTINGS
5.3.8.2 Digital channels
SETTINGS PRODUCT SETUP OSCILLOGRAPHY DIGITAL CHANNELS
DIGITAL CHANNELS
— This setting selects the FlexLogic operand state recorded in an oscillography trace. The length of
DIGITAL 1(63) CHANNEL
each oscillography trace depends in part on the number of parameters selected here. Parameters set to "Off" are ignored.
To populate quickly the rows in the Offline Window, use Ctrl C/V to copy/paste, or click then double-click a row to display a
quick selection window.
5.3.8.3 Analog channels
SETTINGS PRODUCT SETUP OSCILLOGRAPHY ANALOG CHANNELS
ANALOG CHANNELS
These settings select the metering actual value recorded in an oscillography trace. The length of each oscillography trace
depends in part on the number of parameters selected here. Parameters set to "Off" are ignored. The parameters available
in a given relay depend on
•
the type of relay,
•
the type and number of CT/VT hardware modules installed, and
•
the type and number of analog input hardware modules installed
A list of all possible analog metering actual value parameters is presented in Appendix A: FlexAnalog Parameters. The
parameter index number shown in any of the tables is used to expedite the selection of the parameter on the relay display.
It can be time-consuming to scan through the list of parameters via the relay keypad and display — entering this number
via the relay keypad causes the corresponding parameter to display.
All eight CT/VT module channels are stored in the oscillography file. The CT/VT module channels are named as follows:
<slot_letter><terminal_number>—<I or V><phase A, B, or C, or 4th input>
The fourth current input in a bank is called IG, and the fourth voltage input in a bank is called VX. For example, F2-IB
designates the IB signal on terminal 2 of the CT/VT module in slot F.
If there are no CT/VT modules and analog input modules, no analog traces appear in the file; only the digital traces appear.
The source harmonic indices appear as oscillography analog channels numbered from 0 to 23. These correspond directly
to the to the 2nd to 25th harmonics in the relay as follows:
T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
DIGITAL CHANNEL 1:
Off
DIGITAL CHANNEL 63:
Off
Figure 5-41: Quick selection window
ANALOG CHANNEL 1:
Off
ANALOG CHANNEL 16:
Off
Range: FlexLogic operand
Range: FlexLogic operand
Range: Off, any FlexAnalog/actual value parameter
See Appendix A for list
Range: Off, any FlexAnalog/actual value parameter
See Appendix A for list
PRODUCT SETUP
5
5-101
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