Functions
2.12 Direct Local Trip
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
286
2.12.2 Setting Notes
General
A precondition for using the external local trip is that during the configuration of the device functions (Section
2.1.1) address 122 DTT Direct Trip was set to Enabled. At address 2201 FCT Direct Trip it can also
be switched ON or OFF.
For the external local trip, a trip time delay can be set in address 2202 Trip Time DELAY. This delay time
can be used as security time margin.
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 2.1.2). Reliable
operation of the circuit breaker is therefore ensured, even if the initiating signal pulse is very short.
2.12.3 Settings
2.12.4 Information List
Addr. Parameter Setting Options Default Setting Comments
2201 FCT Direct Trip ON
OFF
OFF Direct Transfer Trip (DTT)
2202 Trip Time DELAY 0.00 .. 30.00 sec; ∞ 0.01 sec Trip Time Delay
No. Information Type of In-
formation
Comments
4403 >BLOCK DTT SP >BLOCK Direct Transfer Trip function
4412 >DTT Trip L1 SP >Direct Transfer Trip INPUT Phase L1
4413 >DTT Trip L2 SP >Direct Transfer Trip INPUT Phase L2
4414 >DTT Trip L3 SP >Direct Transfer Trip INPUT Phase L3
4417 >DTT Trip L123 SP >Direct Transfer Trip INPUT 3ph L123
4421 DTT OFF OUT Direct Transfer Trip is switched OFF
4422 DTT BLOCK OUT Direct Transfer Trip is BLOCKED
4432 DTT TRIP 1p. L1 OUT DTT TRIP command - Only L1
4433 DTT TRIP 1p. L2 OUT DTT TRIP command - Only L2
4434 DTT TRIP 1p. L3 OUT DTT TRIP command - Only L3
4435 DTT TRIP L123 OUT DTT TRIP command L123
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