Schweitzer Engineering Laboratories SEL-700G Series, Инструкция по эксплуатации, Страница: 126 / 824

4.20
SEL-700G Relay Instruction Manual Date Code 20170814
Protection and Logic Functions
Group Settings (SET Command)
The Complete List of Compensation Matrices (m = 1 to 12).
The matrices for odd values of m (1, 3, 5, 7, 9, 11) are similarly constructed, as
are the matrices for even values of m (2, 4, 6, 8, 10, 12). Also, [CTC(m)]
equals the minus of [CTC(m±6)], because these matrices represent shifts
separated by exactly 180 degrees.
Selecting the Correct Values of CTCn for Each Winding.
The process of
choosing the correct CTCn setting value for each winding involves a complete
knowledge of the transformer winding connections, phase relationships, and
CT connections. The following review discusses the nature of the various
connections, their phase shifts, and the reference motion for CTCn selection
based on system phase rotation.
CTC 1
   
1
3
-------
1 –1 0
0 1 –1
–1 0 1

= CTC 2
   
1
3
---
1 –2 1
1 1 –2
–2 1 1

=
CTC 3
   
1
3
-------
0 –1 1
1 0 –1
–1 1 0

= CTC 4
   
1
3
---
–1 –1 2
2 –1 –1
–1 2 –1

=
CTC 5
   
1
3
-------
–1 0 1
1 –1 0
0 1 –1

= CTC 6
   
1
3
---
–2 1 1
1 –2 1
1 1 –2

=
CTC 7
   
1
3
-------
–1 1 0
0 –1 1
1 0 –1

= CTC 8
   
1
3
---
–1 2 –1
–1 –1 2
2 –1 –1

=
CTC 9
   
1
3
-------
0 1 –1
–1 0 1
1 –1 0

= CTC 10
   
1
3
---
1 1 –2
–2 1 1
1 –2 1

=
CTC 11
   
1
3
-------
1 0 –1
–1 1 0
0 –1 1

= CTC 12
   
1
3
---
2 –1 –1
–1 2 –1
–1 –1 2

=