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Functions
2.12 Direct Local Trip
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
Addr.
Parameter
2201
FCT Direct Trip
2202
Trip Time DELAY
2.12.4
Information List
No.
Information
4403
>BLOCK DTT
4412
>DTT Trip L1
4413
>DTT Trip L2
4414
>DTT Trip L3
4417
>DTT Trip L123
4421
DTT OFF
4422
DTT BLOCK
4432
DTT TRIP 1p. L1
4433
DTT TRIP 1p. L2
4434
DTT TRIP 1p. L3
4435
DTT TRIP L123
286
Setting Options
ON
OFF
0.00 .. 30.00 sec; ∞
Type of In-
formation
SP
>BLOCK Direct Transfer Trip function
SP
>Direct Transfer Trip INPUT Phase L1
SP
>Direct Transfer Trip INPUT Phase L2
SP
>Direct Transfer Trip INPUT Phase L3
SP
>Direct Transfer Trip INPUT 3ph L123
OUT
Direct Transfer Trip is switched OFF
OUT
Direct Transfer Trip is BLOCKED
OUT
DTT TRIP command - Only L1
OUT
DTT TRIP command - Only L2
OUT
DTT TRIP command - Only L3
OUT
DTT TRIP command L123
Default Setting
OFF
Direct Transfer Trip (DTT)
0.01 sec
Trip Time Delay
Comments
C53000-G1176-C169-5, Release date 02.2011
Comments
SIPROTEC, 7SD5, Manual
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