GE KVGC 202, Technical Manual

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KVCG202/EN M/H11 Technical Manual
KVGC202
Following the initiation of a tap change operation the display will change to show the time
remaining before the next tap change is due. It will do this by temporarily changing to
default display 6, alarm status/raise volts/lower volts and time remaining. This change
will not occur if display 7 is selected, as this option already displays the time remaining.
The display will revert to the original option when either the timer expires, or the system
voltage returns to within the deadband. Certain default displays show textual information
about fault conditions, this information will be cleared along with the associated LED
display, when the [0] key is pressed and held for 1 second.
The default display can be returned to without waiting for the 15 minute delay to expire by
moving to a column heading and pressing the [0] key for 1 second.
3.3.2 Accessing the menu
Four keys on the front plate of the relay allow the menu to be scanned and the contents
displayed on the liquid crystal display.
To move from the default display the [F] key should be pressed momentarily and the
display will change to [0000 SYSTEM DATA], the column heading for the first menu
column. Further momentary presses of the [F] key will step down the column, row by
row, so that data may be read. If at any time the [F] key is pressed and held for one
second the cursor will be moved to the top of the next column and the heading for that
column will be displayed. Further momentary presses of the [F] key will then move down
the new column, row by row. In this way the full menu of the relay may be scanned with
just one key and this key is accessible with the cover in place on the relay. Pressing the
[F] and [0] keys together can step back up the column.
The only settings which can be changed with the cover in place are those that can be
reset either to zero or some preset value by means of the [0] key, provided they do not
require a password to be entered.
To change any other settings the cover must be removed from the relay to gain access to
the [+] and [–] keys that are used to increment or decrement a value.
When a column heading is displayed the [–] key will change the display to the next
column and the [+] key will change the display to the previous column, giving a faster
selection.
When a cell that can be changed is displayed, the action of pressing either the [+] or [–]
keys will put the relay in setting mode indicated by a flashing cursor in the display. To
escape from the setting mode without making any change, the [0] key should be
depressed for one second. Chapter 3.4 gives instructions for changing the various types
of settings.
Password protection is provided for the configuration settings of the relay because an
accidental change could seriously affect the ability of the relay to perform its intended
functions. Configuration settings include the selection of CT and VT ratios, function link
settings, opto-input and relay output allocation. Some control, logic and reset functions,
are protected from change when the relay cover is in place.
3.3.3 Menu contents
Related data and settings are grouped in separate columns of the menu. Each column
has a text heading (in capital letters) that identifies the data contained in that column.
Each cell may contain text, values, settings and/or a function. The cells are referenced
by the column number/row number. For example, 0201 is column 02, row 01. When a
cell is displayed the four digits at the top left hand corner of the LCD indicate the column
number and row number in the menu table.
The full menu is given in the following tables, but not all the items listed will be available
in a particular relay. Those cells that do not provide any useful purpose are not made
available in the factory configuration. Certain settings will disappear from the menu when
the user de-selects them; the alternative setting group is a typical example. If System
Data Link (SD4) is set to ‘0’ alternative settings will be hidden and to make them visible,
the System Data Link SD4 must be set to ‘1’.