Settings - Siemens SIPROTEC 4 7SJ61 Manual

The threshold value setting applies to all three phases, and must take into consideration all used protection
functions.
The pickup threshold for the breaker failure protection is set separately (see Section
When using the device as motor protection and using the overload protection, load jam protection and restart
inhibit, the protective relay can distinguish between a running motor and a stopped motor, as well as take into
account the different motor cooldown behavior. For this application, the set value must be lower than the
minimum no-load current of the motor.
Circuit-breaker Maintenance (Breaker)
Parameters 260 to 267 are assigned to CB maintenance. The parameters and the different procedures are
explained in the setting notes of this function (see Section
Two-phase Time Overcurrent Protection (Protection Operating Quantities)
The two-phase overcurrent protection functionality is used in grounded or compensated systems where inter-
action of three-phase devices with existing two-phase protection equipment is required. Via parameter 250
50/51 2-ph prot the time overcurrent protection can be configured to two or three-phase operation. If the
parameter is set to ON, the value 0 A instead of the measured value for Ι
threshold comparison so that no pickup is possible in phase B. All other functions, however, operate in three
phases.
Ground Fault Protection (Protection Operating Quantities)
Parameter 613 50N/51N/67N w. defines whether ground fault protection, breaker failure protection or Fuse
Failure Monitor is either to operate using measured values (Ignd (measured))) or the quantities calculated
from the three phase currents (3I0 (calcul.)). In the first case, the measured quantity at the fourth
current input is evaluated. In the latter case, the summation current is calculated from the three phase current
inputs. If the device features a sensitive ground current input (measuring range starts at 1 mA), the ground
fault protection always uses the calculated variable 3I0. In this case, parameter 613 50N/51N/67N w. is not
available.
2.1.3.3

Settings

Addresses which have an appended "A" can only be changed with DIGSI, under "Additional Settings".
The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secon-
dary nominal current of the current transformer.
Addr. Parameter
201 CT Starpoint
204 CT PRIMARY
205 CT SECONDARY
207 Vnom-PRI VT V4
208 Vnom-SEC VT V4
209 PHASE SEQ.
210A TMin TRIP CMD
211A TMax CLOSE CMD
212 BkrClosed I MIN
SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016
C Setting Options
towards Line
towards Busbar
10 .. 50000 A
1A
5A
0.10 .. 800.00 kV
100 .. 225 V
A B C
A C B
0.01 .. 32.00 sec
0.01 .. 32.00 sec
1A 0.04 .. 1.00 A
5A 0.20 .. 5.00 A
2.12.2 Setting
2.17.2 Statistics).
is used permanently for the
B
Default Setting Comments
towards Line CT Starpoint
100 A CT Rated Primary Current
1A CT Rated Secondary
Current
12.00 kV VT Rated Primary Voltage
V4
100 V VT Rated Secondary
Voltage V4
A B C Phase Sequence
0.15 sec Minimum TRIP Command
Duration
1.00 sec Maximum Close Command
Duration
0.04 A Closed Breaker Min.
Current Threshold
0.20 A
Functions
2.1 General
Notes).
39