Siemens siprotec 7SA522 User Manual page 202

Functions
6.2.3.3 Settings
Addr. Setting Title
1301 Op. mode Z1
1302 R(Z1) Ø-Ø
1303 X(Z1)
1304 RE(Z1) Ø-E
1305 T1-1phase
1306 T1-multi-phase
1307 Zone Reduction
1351 Op. mode Z1B
1352 R(Z1B) Ø-Ø
1353 X(Z1B)
1354 RE(Z1B) Ø-E
1355 T1B-1phase
6-54
Zone Z1B is usually used in combination with automatic reclosure and/or teleprotec-
tion systems. It can be activated internally by the teleprotection functions (see also
section 6.4) or the integrated automatic reclosure (if available, see also section 6.1) or
externally by a binary input. It is generally set to at least 120% of the line length. On
three-terminal line applications (teed feeders), it must be set to securely reach beyond
the longest line section, even when there is additional infeed via the tee-off point. The
delay times are set in accordance with the type of application, usually to zero or a very
small delay. When used in conjunction with teleprotection comparison systems, the
dependence on the fault detection must be considered (refer to margin heading "Dis-
tance Protection Prerequisites" in Sub-section 6.4.2.
If the distance protection is used in conjunction with an automatic recloser, it may be
determined in address 1357 VW $5 ! =% which distance zones are released prior
to a rapid automatic reclosure. Usually the overreaching zone Z1B is used for the first
cycle (VW $5 ! =% = <HV). This may be suppressed by changing the setting to
VW $5 ! =% equals 1R. In this case the overreaching zone Z1B is not released
before and during the 1
setting only has an effect when the service condition of the automatic reclose function
is input to the device via binary input ">Enable ARzones" (FNo. 383, power system
data 2).
Setting Options
Forward
Reverse
Non-Directional
Inactive
0.05..250.00 Ohm
0.05..250.00 Ohm
0.05..250.00 Ohm
0.00..30.00 sec
0.00..30.00 sec
0..30 °
Forward
Reverse
Non-Directional
Inactive
0.05..250.00 Ohm
0.05..250.00 Ohm
0.05..250.00 Ohm
0.00..30.00 sec
st
automatic reclose cycle. Zone Z1 is always released. The
Default Setting
Forward
1.25 Ohm
2.50 Ohm
2.50 Ohm
0.00 sec
0.00 sec
0 °
Forward
1.50 Ohm
3.00 Ohm
3.00 Ohm
0.00 sec
Comments
Operating mode Z1
R(Z1), Resistance for ph-ph-
faults
X(Z1), Reactance
RE(Z1), Resistance for ph-e
faults
T1-1phase, delay for single
phase faults
T1multi-ph, delay for multi phase
faults
Zone Reduction Angle (load
compensation)
Operating mode Z1B (overrre-
ach zone)
R(Z1B), Resistance for ph-ph-
faults
X(Z1B), Reactance
RE(Z1B), Resistance for ph-e
faults
T1B-1phase, delay for single ph.
faults
7SA522 Manual
C53000-G1176-C119-2