GE DTR GEK-106305A, Instruction Manual

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2. OPERATION PRINCIPLES
28 DTR Digital Tap Changer Controller GE—106305A
2.5 USER INTERFACE AND COMMUNICATIONS
2.5.1 LOCAL USER INTERFACE
The local man machine interface in the DTR system is developed through two keyboard/display sets, one for
protection functions and the other for control functions.
Local Protection MMI
The protection HMI incorporates keyboard with 20 keys and an alphanumeric LCD display with two rows of 16
characters each, that allows access to all the information available in the protection system, that is:
Display and change settings
Display of states and measurements
Perform actions (operations)
Access to the Configuration Menu and to the Single Key Menu (this menu shows the most important information
of the device by pressing only one key)
Control Local MMI
The control HMI incorporates functional keyboard with 6 keys and graphic LCD display. This graphic LCD shows four
different screens that can be accessed sequentially.
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BAY MIMIC
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This screen shows the mimic of the bay, that is, a diagram of the bay related to the DTR module, showing the status
of the transformer OLTC, tap number, measured voltage, setpoint and other information. This screen can be
configured with the GE_Intro configuration software. The following picture shows an example of this screen:
In this screen, the different elements can be selected (by means of the arrow keys) and the user can perform
operations related to those elements. When the user selects an element that can be operated, the display shows the
available options that can be selected with the F1.F4 keys.