Line Angle (only for Fault Location)
The setting of the line angle is only important for the utilization of the line fault location function. The line
angle can be derived from the line constants. The following applies:
[formel-allg-ltgdaten-1-oz-310702, 1, en_US]
with R
L
being the ohmic resistance and X
L
being the reactance of the line.
The value under address 1109 applies if only one line section is available and to all faults that occur outside
the defined line sections.
If several line sections are set, the following shall apply:
•
for line section 1, address 6005
•
for line section 2, address 6015
•
for line section 3, address 6025
This data can be used for the entire line or line section, or as distance-related values, since the quotients are
independent of the distance. It is also irrelevant whether the quotients were derived from primary or secon-
dary values.
Calculation Example::
110 kV free line 150 mm
2
with the following data:
R'
1
= 0.19 Ω/km (0.31 Ω/mile)
X'
1
= 0.42 Ω/km (0.69 Ω/mile)
The line angle is calculated as follows:
[formel-allg-ltgdaten-2-oz-310702, 1, en_US]
The respective address must be set to Line angle = 66°.
Line Length (only for Fault Location)
The setting of the line length is only important for the utilization of the line fault location function. The line
length is required so that the fault location can be given as a reference value (in %). Furthermore, when using
several line sections, the respective length of the individual sections is defined.
The values under address 1110 (km) or 1111 (Miles apply if only one line section is available and to all faults
that occur outside the defined line sections.
If several line sections are set, the following shall apply:
•
for line section 1, addresses 6006 (km) or 6007 (Miles)
•
for line section 2, addresses 6016 (km) or 6017 (Miles)
•
for line section 3, addresses 6026 (km) or 6027 (Miles)
The length set for the entire line must correspond to the sum of lengths configured for the line sections. A
deviation of 10% max. is admissible.
Operating Range of the Overload Protection
The current threshold entered in address 1107 I MOTOR START limits the operating range of the overload
protection to larger current values. The thermal replica is kept constant for as long as this threshold is
exceeded.
Functions
2.1 General
52 SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
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