Inputs TAP_POS outputs
0 0 1 0 0 1 0 18 12 28
0 0 1 0 0 1 1 19 13 29
0 0 1 0 1 0 0 20 14 24
0 0 1 0 1 0 1 21 15 25
0 0 1 0 1 1 0 22 16 27
0 0 1 0 1 1 1 23 17 26
0 0 1 1 0 0 0 24 18 16
0 0 1 1 0 0 1 25 19 17
0 0 1 1 0 1 0 26 19 19
0 0 1 1 0 1 1 27 19 18
0 0 1 1 1 0 0 28 19 23
0 0 1 1 1 0 1 29 19 22
0 0 1 1 1 1 0 30 19 20
0 0 1 1 1 1 1 31 19 21
0 1 0 0 0 0 0 32 20 63
0 1 0 0 0 0 1 33 21 62
0 1 0 0 0 1 0 34 22 60
0 1 0 0 0 1 1 35 23 61
0 1 0 0 1 0 0 36 24 56
... ... ... ... ... ... ...
8.3.5 Application
TPOSYLTC provides tap position information for other functions as a signed
integer value that can be fed to the tap position input.
The position information of the tap changer can be coded in various methods
for many applications, for example, the differential protection algorithms. In this
function, the binary inputs in the transformer terminal connector are used as inputs
to the function. The coding method can be chosen by setting the mode parameter.
The available coding methods are BCD, Gray and Natural binary coding. Since the
number of binary inputs are limited to seven, the coding functions are limited
to seven bits including the sign bit and thus the six bits are used in the coding
functions. The position limits for the tap positions at BCD, Gray and Natural binary
coding are ±39, ±63 and ±63 respectively.
In this example, the transformer tap changer position indication is wired as a mA
signal from the corresponding measuring transducer. The position indication is
connected to input 1 ( AI_VAL1) of the X130 ( RTD) card. The tap changer operating
range from the minimum to maximum turns of the tap and a corresponding mA
signal for the tap position are set in XRGGIO130. Since the values of the XRGGIO130
outputs are floating point numbers, the float to integer (T_F32_INT8) conversion is
needed before the tap position information can be fed to TPOSYLTC. When there is
a wired connection to the TAP_POS connector, the validated tap changer position is
presented in the TAP_POS output that is connected to other functions, for example,
1MRS757644 H
Measurement functions
620 series
Technical Manual
979
To Next Page
Loading...
