Siemens siprotec 7SD5 User Manual page 353

that the line parameters addresses 1116, 1117, 1120 and 1121 are also relevant
(refer also to Section 2.1.4).
If the fault location calculation is to be started by the trip command of the protection,
set address 3802 START = TRIP. In this case a fault location is only output if the
device has also issued a trip. The fault location calculation can however also be
started with each fault detection of the device (address 3802 START = Pickup). In
this case the fault location is also calculated if for example a different protection device
cleared the fault. If the fault is located outside the protected line, only single-ended
fault location is possible.
To calculate the distance to fault in kilometers or miles, the device needs the reactance
per unit length in Ω/km or Ω/mile, and in the case of double-ended fault location the
capacitance per unit length in µF/km or µF/mile. For correct indication of the fault lo-
cation in % of line length, the correct line length has also to be entered. For the double-
ended fault locator this information is mandatory. These setting parameters were
already applied with the Power System Data 2 (Section 2.1.4.1 at „General Line
Data").
A prerequisite for the correct indication of the fault location is furthermore that the other
parameters that influence the calculation of the distance to fault have also been set
correctly.
If only one line section (address 160 = 1 Section) is set, these parameters are:
• 1116 RE/RL(Z1),
• 1117 XE/XL(Z1) or
• 1120 K0 (Z1),
• 1121 Angle K0(Z1).
If multiple line sections (address 160 = 2 Sections or 3 Sections) are set, you
must set the following parameters.
For line section 1 set the addresses:
• 6009 S1: XE/XL,
• 6010 S1: RE/RL or
• 6011 S1: K0,
• 6012 S1: angle K0.
For line section 2 set the addresses:
• 6029 S2: XE/XL,
• 6030 S2: RE/RL or
• 6031 S2: K0,
• 6032 S2: angle K0.
For line section 3 set the addresses:
• 6049 S3: XE/XL,
• 6050 S3: RE/RL or
• 6051 S3: K0,
• 6052 S3: angle K0.
7SD5 Manual
C53000-G1176-C169-1
2.19 Fault Locator
353