Siemens siprotec 7SA6, Manual

Page: 215 / 876

Functions
6-25
7SA6 Manual
C53000-G1176-C156-2
Figure 6-14
Multiple fault on a double-circuit line next to a generato
r
Address
1156A Trip2phFlt
determines that the short-circuit protection functions
perform only a single-pole trip in case of isolated two-phase faults (clear of ground),
provided that single-pole tripping is possible and permitted. This allows a single-pole
rapid automatic reclosure cycle for this kind of fault. The trip type can be set to
1pole
leading phase
or
1pole lagging phase
. The parameter is only available in ver-
sions with single-pole tripping. This setting can only be modified with DIGSI
®
4 under
“Additional Settings”. If this option is used, it must be born in mind that the phase
preference should be the same throughout the entire network and that it must be the
same at all ends of one line. More information on the function is also contained in Sec-
tion 6.22.3 Overall Fault Detection Logic of the Device. The default setting is
triple-
pole
.
6.1.3.1 Settings
Note: The indicated secondary current values and values of impedance for setting
ranges and default settings refer to I
N
= 1 A. For the nominal current 5 A the current
values are to be multiplied by 5. The values of impedance are divided by 5.
Addresses which have an „A“ attached to its end can only be changed with DIGSI
®
4
in “Additional Settings“.
~
L1–E
L2–E
Addr. Setting Title Setting Options Default Setting Comments
1103 FullScaleVolt. 1.0..1200.0 kV; 0 400.0 kV Measurement: Full Scale
Voltage (100%)
1104 FullScaleCurr. 10..5000 A 1000 A Measurement: Full Scale Cur-
rent (100%)
1105 Line Angle 30..89
°
85
°
Line Angle
1110 x' 0.0050..6.5000 Ohm / km 0.1500 Ohm / km x' - Line Reactance per length
unit
1111 Line Length 1.0..1000.0 km 100.0 km Line Length
1112 x' 0.0050..10.0000 Ohm / mile 0.2420 Ohm / mile x' - Line Reactance per length
unit
1113 Line Length 0.6..650.0 Miles 62.1 Miles Line Length
1116 RE/RL(Z1) -0.33..7.00 1.00 Zero seq. comp. factor RE/RL
for Z1
1117 XE/XL(Z1) -0.33..7.00 1.00 Zero seq. comp. factor XE/XL for
Z1