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7SR11 & 7SR12 Installation Guide
Ia, Ib, Ic
50/51 - Phase
In
Overcurrent
Ig
50N/51N -
Derived E/F
50G/51G -
Measured E/F
CT/VT CONFIG:
Selects 1 or 5A
Phase Current
CT ratio for
Input
primary meters
Phase CT Ratio
Earth Current
Input
Earth CT Ratio
Chapter 5 Page 24 of 32
A13
A14
A15
A16
A17
A
B
C
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A
B
C
©2017 Siemens Protection Devices Limited
1A
Ia
5A
1A
Ib
5A
1A
Ic
5A
1A
Ig
5A
1A
Ia
5A
1A
Ib
5A
1A
Ic
5A
1A
Ig
5A
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