Siemens SIPROTEC 7SJ62 Instruction Manual page 111

7SJ62 Manual
C53000-G1140-C121-1
Figure 5-15 Information Properties Example for Information Type "Transformer Tap Chang-
er" (TxTap)
If none of the available encoding formats are selected, each individual tap changer po-
sition may be set in a table. The table is accessed after the pull-down menu 7DEOH for
encoding is opened, by selecting the button to the side.
The encoded transformer tap changer position bit pattern is transformed into digital
values between 1 and 62. An unrecognized pattern is interpreted as position 63.
The number of bits coincides with the number of the binary inputs to be configured,
and limits the number of positions to be represented.
Using the display offset, the beginning of the evaluated bits may have an offset of a
programmed number. The stepping of the transfomer taps may be modified, using the
tap interval feature (see example).
Example:Four transformer position settings are to be represented by three binary in-
puts, using the designators 3 through 6. The encoding is binary.
Orientation
BI1 BI2
- -
X -
- X
X X
- -
X -
Using three binary inputs (= 3 bits), a maximum of 2
resented in binary code. In order to begin the representation of transformer tap chang-
er positions with the value 3, the display offset is chosen accordingly. The following
must be set on the information property window:
Encoding
Number of positions
Number of bits
Display offset
Position change
Desired representation
BI3
- 63.00
- 3.00
- 4.00
- 5.00
X 6.00
X 63.00
3
= 8 position settings may be rep-
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Configuration
5-17