
Functions
2.3 Breaker Intertrip and Remote Tripping
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
77
The setting times depend on the individual case of application. A delay is necessary if the external control signal
originates from a disturbed source and a restraint seems appropriate. Of course, the control signal has to be
longer than the delay for the signal to be effective. If the signal is processed externally at the receiving end, a
prolongation time might become necessary for the transmitting end so that the reaction desired at the receiving
end can be executed reliably.
Release Thresholds
Before the release for tripping is given, the phase and ground currents must exceed settable thresholds. You
can set these thresholds at the following addresses:
•
1305
85 DT Iph rel.
for the minimum phase current
•
1306
85 DT 3I0 rel.
for the minimum ground current 3I0
2.3.3
Settings
The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec-
ondary nominal current of the current transformer.
2.3.4
Information List
Addr.
Parameter
C
Setting Options
Default Setting
Comments
1301
85 DT: SEND
YES
NO
YES
85 DT: State of transm.the
intertrip cmd
1302
85 DT: RECEIVE
Alarm only
Trip
Trip
85 DT: React.if intertrip
cmd is receiv.
1303
85 DT: TD-BI
0.00 .. 30.00 sec
0.00 sec
85 DT: Delay for intertrip
via bin.input
1304
85 DT:T-PROL BI
0.00 .. 30.00 sec
0.00 sec
85 DT: Prol. for intertrip via
bin.input
1305
85 DT Iph rel.
1A
0.0 .. 25.0 A;
∞
0.0 A
85 DT minimal Phase
Current to rel. trip
5A
0.0 .. 125.0 A;
∞
0.0 A
1306
85 DT 3I0 rel.
1A
0.0 .. 25.0 A;
∞
0.0 A
85 DT minimal 3I0 Current
to rel. trip
5A
0.0 .. 125.0 A;
∞
0.0 A
No.
Information
Type of In-
formation
Comments
3504
>85 DT 3pol
SP
>86 DT: >Intertrip 3 pole signal input
3517
85 DT Gen. TRIP
OUT
85 DT: General TRIP
17525
85 DT rec.3pole
OUT
85 DT: Received 3pole
17526
85 DT sen.3pole
OUT
85 DT: Sending 3pole