Settings - Siemens SIPROTEC 7SA522 Manual

2 Functions
2.2.2.3

Settings

Addr. Parameter
1301 Op. mode Z1
1302 R(Z1) Ø-Ø
1303 X(Z1)
1304 RE(Z1) Ø-E
1305 T1-1phase
1306 T1-multi-phase
90
SKDVH (address ). If parameter 2S PRGH =% is set to )RUZDUG or 5HYHUVH,
a non-directional trip is also possible in case of closure onto a fault if parameter 
627) ]RQH is set to =% XQGLUHFW (see also Section 2.2.1.3).
Zone Z1B is usually used in combination with automatic reclosure and/or teleprotec-
tion schemes. It can be activated internally by the teleprotection functions (see also
Section 2.6) or the integrated automatic reclosure (if available, see also Section 2.13)
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 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
schemes, the dependence on the fault detection must be considered (refer to margin
heading "Distance Protection Prerequisites" in Subsection 2.6.10.
If the distance protection is used in conjunction with an automatic recloser, it can be
determined in address  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 ! =% = <(6). This may be suppressed by changing the setting of
VW $5 ! =% to 12. In this case the overreaching zone Z1B is not released before
and during the 1st automatic reclose cycle. Zone Z1 is always released. The setting
only has an effect when the service condition of the automatic reclose function is input
to the device via binary input ´!(QDEOH $5]RQHVµ (FNo. 383).
The zones Z4 and Z5 can be blocked using a binary input message FNo. 3619
´!%/2&. = 3K(µ or FNo. 3620 ´!%/2&. = 3K(µ for phase-earth loops. To
block these zones permanently for phase-earth loops, said binary inputs must be set
to the logic value of 1 via CFC.
Addresses which have an appended "A" can only be changed with DIGSI, under Ad-
ditional Settings.
The table indicates region-specific presettings. Column C (configuration) indicates the
corresponding secondary nominal current of the current transformer.
C Setting Options
Forward
Reverse
Non-Directional
Inactive
0.050 .. 600.000 Ω
1A
0.010 .. 120.000 Ω
5A
0.050 .. 600.000 Ω
1A
0.010 .. 120.000 Ω
5A
0.050 .. 600.000 Ω
1A
0.010 .. 120.000 Ω
5A
0.00 .. 30.00 sec; ∞
0.00 .. 30.00 sec; ∞
Default Setting
Forward Operating mode Z1
1.250 Ω
R(Z1), Resistance for ph-
ph-faults
0.250 Ω
2.500 Ω
X(Z1), Reactance
0.500 Ω
2.500 Ω
RE(Z1), Resistance for ph-e
faults
0.500 Ω
0.00 sec T1-1phase, delay for single
phase faults
0.00 sec T1multi-ph, delay for multi
phase faults
Comments
7SA522 Manual
C53000-G1176-C155-3