Toshiba GR200 Series - 2.11 Direct transfer trip (DTT)

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 180 -
Direct transfer trip (DTT)
When direct transfer trip (DTT) function receives a trip signal from the remote, the DTT
function will issue the trip signal for the trip circuit (TRC) to open a circuit breaker (CB). The
DTT function consists of two shemes
1
: DTT1 and DTT2. Each can receive the trip signal
separately; the trip signal can be transferred with the communication
2
.
1
Note: An asterisk (*) is used to express either DTT1 or DTT2 schemes.
2
Note: The communication feature is available with the communication features. See
Chapter Relay application: Transmission control function and Communication
application . The user should make the PLC logic for this DTT operation. See
Chapter PLC function: PLC setting samples for more information.
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Note: The implementation of such features is dependent upon the selection of hardware and
the configuration of functions. Several IED models do not support certain features. To
determine whether a particular feature has been implemented within an IED, identify the IED
ordering number; and check the order number at the “G&T position” referring to the
comparison table below. For more information, see Appendix: Ordering .
Table 2.11-1 Comparative table in respective ordering numbers
feature
Ordering No. at “G&T”
33
37
DTT
Direct transfer trip function (DTT)
✓
✓
✓: Applicable NA: Not applicable