Information List - Siemens SIPROTEC 7SD610 Manual

2.17.5 Differential Protection Values
2.17.5.1 Measured values of differential protection
The differential and restraint current values of the differential protection which are listed in the following table
can be called up at the front of the device, read out via the operating interface using a PC with DIGSI or trans-
ferred to a control centre via the system interface.
Table 2-12 Measured values of the differential protection
IDiff , IDiff , IDiff
L1 L2 L3
IRest , IRest , IRest
L1 L2 L3
IDiff
3I0
1)
for lines according to address (see section 2.1.4), for transformers calculated from address (see Section 2.1.4)
I = S /(√3 · U )
N N N

2.17.5.2 Information List

No. Information
7742 IDiffL1=
7743 IDiffL2=
7744 IDiffL3=
7745 IRestL1=
7746 IRestL2=
7747 IRestL3=
7748 Diff3I0=
30654 IdiffREF=
30655 IrestREF=
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
Measured Values
Calculated differential currents of the three phases
Calculated restraining currents of the three phases
Calculated differential current of the zero sequence system
Type of In-
formation
MV
MV
MV
MV
MV
MV
MV
MV
MV
Comments
IDiffL1(% Operational nominal current)
IDiffL2(% Operational nominal current)
IDiffL3(% Operational nominal current)
IRestL1(% Operational nominal current)
IRestL2(% Operational nominal current)
IRestL3(% Operational nominal current)
Diff3I0 (Differential current 3I0)
Idiff REF(% Operational nominal current)
Irest REF(% Operational nominal current)
Functions
2.17 Additional Functions
% Referred to
Nominal operational current
Nominal operational current
Nominal operational current
1)
1)
1)
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