ABB RELION 620 Series Technical Manual page 983

1MRS757644 F
8.3.5
620 series
Technical Manual
Inputs
0 0 0
0 0 0
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 0 1
0 1 0
0 1 0
0 1 0
0 1 0
0 1 0
... ...
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
1 1 1
1 1 1
0 0 0
0 0 0
0 0 1
0 0 1
0 1 0
0 1 0
0 1 1
0 1 1
1 0 0
1 0 0
1 0 1
1 0 1
1 1 0
1 1 0
1 1 1
1 1 1
0 0 0
0 0 0
0 0 1
0 0 1
0 1 0
...
Section 8
Measurement functions
TAP_POS outputs
0 14 9
1 15 9
0 16 10
1 17 11
0 18 12
1 19 13
0 20 14
1 21 15
0 22 16
1 23 17
0 24 18
1 25 19
0 26 19
1 27 19
0 28 19
1 29 19
0 30 19
1 31 19
0 32 20
1 33 21
0 34 22
1 35 23
0 36 24
... ... ...
11
10
31
30
28
29
24
25
27
26
16
17
19
18
23
22
20
21
63
62
60
61
56
...
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