Functions
2.10 Direct Local Trip
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
140
2.10.2 Setting Notes
General
In order to use the direct and remote tripping functions, address 122 DTT Direct Trip must have been set
to Enabled during the configuration of the device functional scope. At address 2201 Direct Trip(DT) it
can also be switched ON or OFF.
It is possible to set a trip delay for both the local external trip and the receive side of the remote trip in address
2202 Trip Time DELAY. This delay can be used as a safety margin, especially in case of local direct tripping.
Once a trip command has been issued, it is maintained for at least as long as the set minimum trip command
duration TMin TRIP CMD which was set for the device in general in address 240 (Section 2.1.3). Reliable
operation of the circuit breaker is therefore ensured, even if the initiating signal pulse is very short. This param-
eter can only be set in DIGSI at Display Additional Settings.
2.10.3 Settings
The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec-
ondary nominal current of the current transformer.
2.10.4 Information List
Addr. Parameter C Setting Options Default Setting Comments
2201 Direct Trip(DT) ON
OFF
OFF Direct Trip (DT)
2202 Trip Time DELAY 0.00 .. 30.00 sec; ∞ 0.00 sec Trip Time Delay
2203 Iph rel.Trip 1A 0.0 .. 25.0 A; ∞ 0.0 A Minimal Phase Current to
release trip
5A 0.0 .. 125.0 A; ∞ 0.0 A
2204 3I0 rel.Trip 1A 0.0 .. 25.0 A; ∞ 0.0 A Minimal 3I0 Current to
release trip
5A 0.0 .. 125.0 A; ∞ 0.0 A
No. Information Type of In-
formation
Comments
4403 >BLOCK DTT SP >BLOCK Direct Transfer Trip option
4417 >DTT Trip ØABC SP >Direct Transfer Trip INPUT Phases ABC
4421 DTT OFF OUT Direct Transfer Trip is switched OFF
4422 DTT BLOCK OUT Direct Transfer Trip is BLOCKED
4435 DTT TRIP ØABC OUT DTT TRIP command Phases ABC
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