User Interface And Communications; Local User Interface - GE DTR GEK-106305A Instruction Manual

Digital tap changer controller

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2.5 USER INTERFACE AND COMMUNICATIONS

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.

BAY MIMIC

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.

2. OPERATION PRINCIPLES

DTR Digital Tap Changer Controller

GE—106305A

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