Siemens siprotec 7SA522 User Manual

Appendix
A-157SA522 Manual
C53000-G1176-C119-2
Figure 1-10 Current connections to three current transformers and a separate neutral current
transformer (summation transformer) for earth current — preferred for effectively
or low-resistive earthed networks
Important! Cable shield grounding must be done on the cable side!
Note: Change of Address 0201 setting changes polarity of 3I
0
Current
Input, i.e. terminal Q7 must be connected to that CT terminal point-
ing in the same direction as the starpoint of the phase current CTs
(towards “Line side” in this diagramm)
Panel surface mounted
Flush mounted/cubicle
L1 L2 L3
k
l
I
4
I
L1
I
L2
I
L3
Q1
Q3
Q5
Q2
Q4
Q6
Q7Q8
k
l
25
24
23
47
50
49
48
22
7SA522
Housing size
1
/
2
Panel surface mounted
Flush mounted/cubicle
L1 L2 L3
k
l
I
4
I
L1
I
L2
I
L3
Q1
Q3
Q5
Q2
Q4
Q6
Q7Q8
k
l
50
49
48
97
100
99
98
47
7SA522
Housing size
1
/
1
Important! Cable shield grounding must be done on the cable side!
Note: Change of Address 0201 setting changes polarity of 3I
0
Current
Input, i.e. terminal Q7 must be connected to that CT terminal point-
ing in the same direction as the starpoint of the phase current CTs
(towards “Line side” in this diagramm)

Siemens siprotec 7SA522 Specifications

General

Brand	Siemens
Model	siprotec 7SA522
Category	Protection Device
Language	English