Siemens siprotec 7SA6 User Manual page 146

Configuration
User Defined
Measured Values
(MVU) and Limit
Values (LVU)
Metered Values
5-22
Using three binary inputs (= 3 bits), a maximum of 2
represented in binary code. In order to begin the representation of transformer tap
changer 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
The three binary inputs used for this must have sequential numbers, such as BI 1,
BI 2, and BI 3.
For the information type "Measured Values User Defined" (098), the units, the
conversion factor, and the number of significant digits following the decimal point may
be specified. For the information type "Limit Values User Defined" (/98), a limit value
may be programmed (Figure 5-19).
Figure 5-19 Information properties example for information type "Limit Value User Defined"
(LVU)
If, for example, a low current reporter should be established using the CFC logic, and
the percentage of the measured current should be matched to a certain amp value,
the following values are entered in window according to Figure 5-19:
The 'LPHQVLRQ is A (amps). The &RQYHUVLRQ )DFWRU is 150: 150 A corresponds
to 100 % input current. The limit value upon start-up is set for 120 A.
For metered values, the polarity (+/–) is an indicator for the direction of the power flow
(Figure 5-20 and 5-21). For the metered values of measured values (MVMV) the user
3
%LQDU\




= 8 position settings may be
7SA6 Manual
C53000-G1176-C133-1