9
Appendix 1
Examples of secondary terminal marking for cast terminal box
- Current transformers according to IEC
Ck
s1
s2
s1
s2
PE
Ck
s1
s2
s3
s1
s2
s3
PE
Ck
s1
s2
s3
s4
s1
s2
s3
s4
PE
Ck
s1
s2
s3
s4
s5
s1
s2
s3
s4
s5
PE
s6
Ck
s1
s2
s3
s4
s5
s6
s1
s2
s3
s4
s5
PE
Ck
1s1
1s2
2s1
2s2
1s1
1s2
2s1
2s2
PE
1s2
1s3
2s3
Ck
1s1
1s2
1s3
2s1
2s2
2s3
1s1
2s1
2s2
PE
1s2
1s3
2s2
2s3
1s2
1s3
2s2
2s3
Ck
1s1
1s4
2s1
2s4
1s1
1s4
2s1
2s4
PE
1s4
1s5
2s4
2s5
1s1
1s2
1s3
2s1
2s2
2s3
1s2
2s2
3s2
Ck
1s1
1s2
2s1
2s2
3s1
3s2
1s1
2s1
3s1
PE
1s2
1s3
2s3
3s2
3s3
1s2
1s3
2s3
3s2
3s3
Ck
1s1
2s1
2s2
3s1
1s1
2s1
2s2
3s1
PE
1s2
1s3
2s2
2s3
3s2
3s3
1s2
1s3
2s2
2s3
3s2
3s3
Ck
1s1
1s4
2s1
2s4
3s1
3s4
1s1
1s4
2s1
2s4
3s1
3s4
PE
1s3
1s4
1s5
2s4
2s5
3s4
3s5
1s1
1s2
2s1
2s2
2s3
3s1
3s2
3s3
1s2
2s2
3s2
4s2
1s2
2s2
3s2
4s2
Ck
1s1
2s1
3s1
4s1
1s1
2s1
3s1
4s1
PE
1s2
1s3
2s3
3s2
3s3
4s3
1s2
1s3
2s3
3s2
3s3
4s3
Ck
1s1
2s1
2s2
3s1
4s1
4s2
1s1
2s1
2s2
3s1
4s1
4s2
PE
1s2
1s3
2s2
2s3
3s2
3s3
4s2
4s3
1s1
1s4
2s1
2s4
3s1
3s4
4s1
4s4
1s2
2s2
3s2
4s2
5s2
1s1
2s1
3s1
4s1
5s1
1s2
1s3
2s3
3s2
3s3
4s3
5s2
5s3
Ck
1s1
2s1
2s2
3s1
4s1
4s2
5s1
PE
1s2
2s2
3s2
4s2
5s2
6s2
1s1
2s1
3s1
4s1
5s1
6s1
s1
s1
s2
s2
2nd line of terminal
1st line of terminal
No tap
1 tap
No tap
2 tap
3 tap
No tap
1 tap
2 tap
Dummy
with CD
6 cores
special
No tap
1 tap
2 tap
4 tap
3 tap
1 tap
2 tap
3 tap
No tap
No tap
1 tap
Three cores
Three cores with CD
4 cores
4 cores with CD
5 cores
One core
One core with CD
Two cores
Two cores with CD
Variants of connections
- double row terminal
- Special CT according
Ck
s1
s2
s1
s2
PE
Ck
s1
s2
s3
s1
s2
s3
PE
Ck
s1
s2
s3
s4
s1
s2
s3
s4
PE
Ck
s1
s2
s3
s4
s5
s1
s2
s3
s4
s5
PE
s6
Ck
s1
s2
s3
s4
s5
s6
s1
s2
s3
s4
s5
PE
Ck
1s1
1s2
2s1
2s2
1s1
1s2
2s1
2s2
PE
1s2
1s3
2s3
Ck
1s1
1s2
1s3
2s1
2s2
2s3
1s1
2s1
2s2
PE
1s2
1s3
2s2
2s3
1s2
1s3
2s2
2s3
Ck
1s1
1s4
2s1
2s4
1s1
1s4
2s1
2s4
PE
1s4
1s5
2s4
2s5
1s1
1s2
1s3
2s1
2s2
2s3
1s2
2s2
3s2
Ck
1s1
1s2
2s1
2s2
3s1
3s2
1s1
2s1
3s1
PE
1s2
1s3
2s3
3s2
3s3
1s2
1s3
2s3
3s2
3s3
Ck
1s1
2s1
2s2
3s1
1s1
2s1
2s2
3s1
PE
1s2
1s3
2s2
2s3
3s2
3s3
1s2
1s3
2s2
2s3
3s2
3s3
Ck
1s1
1s4
2s1
2s4
3s1
3s4
1s1
1s4
2s1
2s4
3s1
3s4
PE
1s3
1s4
1s5
2s4
2s5
3s4
3s5
1s1
1s2
2s1
2s2
2s3
3s1
3s2
3s3
1s2
2s2
3s2
4s2
1s2
2s2
3s2
4s2
Ck
1s1
2s1
3s1
4s1
1s1
2s1
3s1
4s1
PE
1s2
1s3
2s3
3s2
3s3
4s3
1s2
1s3
2s3
3s2
3s3
4s3
Ck
1s1
2s1
2s2
3s1
4s1
4s2
1s1
2s1
2s2
3s1
4s1
4s2
PE
1s2
1s3
2s2
2s3
3s2
3s3
4s2
4s3
1s1
1s4
2s1
2s4
3s1
3s4
4s1
4s4
1s2
2s2
3s2
4s2
5s2
1s1
2s1
3s1
4s1
5s1
1s2
1s3
2s3
3s2
3s3
4s3
5s2
5s3
Ck
1s1
2s1
2s2
3s1
4s1
4s2
5s1
PE
1s2
2s2
3s2
4s2
5s2
6s2
1s1
2s1
3s1
4s1
5s1
6s1
s1
s1
s2
s2
2nd line of terminal
1st line of terminal
No tap
1 tap
No tap
2 tap
3 tap
No tap
1 tap
2 tap
Dummy
with CD
6 cores
special
No tap
1 tap
2 tap
4 tap
3 tap
1 tap
2 tap
3 tap
No tap
No tap
1 tap
Three cores
Three cores with CD
4 cores
4 cores with CD
5 cores
One core
One core with CD
Two cores
Two cores with CD
Variants of connections
- double row terminal
- Special CT according