Setting Notes - Siemens SIPROTEC 7SC80 Series Manual

Table 2-9 Assignment of Pickup - Evaluated Loops
Pickup by
A B C
x
x
x
x
x
x
x x
x x
x x
x x
x x
x x
x x x
x x x
Output of Fault Location
The following information is output as result of the fault location:
• the short-circuit loop from which the fault reactance was determined,
• the fault reactance X in Ω primary and Ω secondary,
• the fault resistance R in Ω primary and Ω secondary,
• the distance to fault d in kilometers or miles of the line proportional to the reactance, converted on the basis
of the set line reactance per unit line length,
• the distance to fault d in % of the line length, calculated on the basis of the set reactance per unit length and
the set line length.
Line Sections
The line type is determined by the line section settings. If, for instance, the line includes a cable and an over-
head line, two different sections must be configured. The system can distinguish between up to three different
line types. When configuring this line data, please note that the different tabs for setting the line sections will
only be displayed if more than one line section has been configured under the functional scope (address 181).
The parameters for a line section are entered in the Setting tab .
2.9.2

Setting Notes

General
The fault location is only enabled if address 180 was set to Enabled during configuration of the function extent.
Under address 181 L-sections FL the number of line section must be selected, which is required for the
accurate description of the line. If the number is set to 2 Sections or 3 Sections, further setting sheets
appear in the Power System Data 2 in DIGSI. Default setting is 1 Section.
SIPROTEC, 7SC80, Manual
E50417-G1140-C486-A1, Release date 12.2011
fault type measured loop
N
A A-N
B B-N
C C-N
x N A-N, B-N, C-N
x A-N A-N
x B-N B-N
x C-N C-N
A-B A-B
A-C A-C
B-C B-C
x A-B-N A-B, A-N, B-N
x A-C-N C-A, A-N, B-N
x B-C-N B-C, B-N, C-N
A-B-C A-B, B-C, C-A
x A-B-C-N A-B, B-C, C-A, A-N, B-N, C-N
Functions
2.9 Fault Locator
signaled loop
A-N
B-N
C-N
lowest impedance
A-N
B-N
C-N
A-B
A-C
B-C
Lowest impedance
Lowest impedance
Lowest impedance
lowest impedance
lowest impedance
135