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The DTR system includes 3 independent setting tables, stored in non-volatile memory (EEPROM), so that
information is kept even when there is no auxiliary voltage. Only one setting table is active at a given time, which the
system uses to run the different functions included in it.
From all the settings existing in the DTR system, there is one group (corresponding to General Settings) which is
generic and, therefore, it is common to all the settings tables, while the rest of the settings are presented separately
for each table.
There is an "Active Table" setting which determines which setting table is active at a given moment.
The setting table can be changed by means of up to 2 digital inputs, referred as "TABLE SELECTION 0" and "TABLE
SELECTION 1" which allow up to 4 combinations from 0 to 3. To do this, it is necessary to configure (using
GE_INTRO software) two inputs to have these meanings. For applications which require fewer tables (up to 2) it is
possible to use only one input.
The selected combination is obtained from the binary coding of the 2 inputs mentioned (see following table). The 0-0
means selecting the table indicated in the "ACTIVE TABLE" setting, and numbers 0-1 to 1-1 (1, 2 and 3 in decimal
values) select tables 1 to 3 respectively.
Number
TABLE SELECTION 1
0
0
1
0
2
1
3
1
NOTE: If the inputs are programmed and used, energizing them, this selection has priority over the "ACTIVE TABLE"
setting and the table which is in fact used is determined by the status of the digital inputs.
GEK-106305A
2. OPERATION PRINCIPLES
TABLE SELECTION 0
0
1
0
1
DTR Digital Tap Changer Controller
2.4.6 SETTING TABLES
Active Table
Selected by setting
1
2
3
27
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