Table of Contents
Advertisement
Functions
6.2.4.3
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
6-64
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 6.6) 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 6.6.2.
If the distance protection is used in conjunction with an automatic recloser, it may be
determined in address 1357 1st AR -> Z1B which distance zones are released prior
to a rapid automatic reclosure. Usually the overreaching zone Z1B is used for the first
cycle ( 1st AR -> Z1B = Yes ). This may be suppressed by changing the setting to
1st AR -> Z1B equals No . 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).
Note: The indicated secondary values of impedance for setting ranges and default set-
tings refer to I
= 1 A. For the nominal current 5 A the values of impedance are to be
N
divided by 5.
Addresses which have an „A" attached to its end can only be changed with DIGSI
in " Additional Settings ".
Setting Options
Forward
Reverse
Non-Directional
Inactive
0.050..250.000 Ohm
0.050..250.000 Ohm
0.050..250.000 Ohm
0.00..30.00 sec; ∞
0.00..30.00 sec; ∞
0..45 °
Forward
Reverse
Non-Directional
Inactive
0.050..250.000 Ohm
st
automatic reclose cycle. Zone Z1 is always released. The
Default Setting
Forward
1.250 Ohm
2.500 Ohm
2.500 Ohm
0.00 sec
0.00 sec
0 °
Forward
1.500 Ohm
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
7SA6 Manual
C53000-G1176-C156-2
®
4
Advertisement
Table of Contents
