Toshiba GR200 Series Instruction Manual page 53

Trip mode
(iv)
TRIP commands for opening the CB poles
The DIFL function issues a per-phase trip signal so that a per-phase TRIP COMMAND will be
generated in the TRC function; set a single-phase trip (1P) mode for scheme switch [DIFL-
TPMD]. The user can also set a three-phase trip (3P) mode if TRIP_COMMANDs are not
required to generated in an individual phase. Note that the TRIP_COMMANDs will be issued
for the CB in the TRC function after collecting signals from the other functions. In the '1P
mode' operation, set Per-PHASE for the switch [TP-MODE]. Remember that TRIP
_COMMANDs will be issued in three-phases unconditionally if 3-PHASE is set for the [TP-
MODE]. The user should recognize that the settings of the [DIFL-TPMD] (see Figure 2.2-3) and
the setting [TP-MODE] (see Figure 2.33-3) have cooperation to trip the CB correctly.
Note: Setting 1-PHASE is used to issue TRIP_COMMANDs in three-phases if phase-to-
phase faults occur. For your information, the settings in TRC function affect the
other trip signals from the ZG and other functions. See
Trip circuit
TRIP commands during CTF
The trip signal can be influenced by the operation in CT circuit-failure detection function (CTF-
DIFL†). The user can select a block signal in response to the CT circuit-failure using scheme
switch [DIFL-CTFBlk]. If blocking a trip signal upon occurrence of the CT circuit-failure is not
required, the user should set Non for scheme switch [DIFL-CTFBlk]. If the failed phase is only
required to blocked on occurrence of the CT circuit-failure, the user should set Block-PerP for
the scheme switch [DIFL-CTFBlk]. On the other hand, if required is to block a trip signal to all
three phases upon occurrence of the CT circuit-failure, the user has to set Block-3P for the
scheme switch [DIFL-CTFBlk].
†Note: The operation and the logic of the CTF-DIFL function is discussed in section
2.2.3.
Switch for DIFL operation
(v)
The user should set On for scheme switch [DIFL-EN] prior to the DIFL operation, as illustrated
in Figure 2.2-3. The DIFL#1 element and the DIFL#2 element can be operated per phase basis;
thus the DIFL function can issue respective trip signals "DIFL-TRIP-A, -B, and -C". Note both
DIFL elements run in parallel; the DILF elements are not designed to operate in hot-standby
mode.
Setting for autoreclose function
(vi)
Autoreclose (ARC) function is to re-close the CB again to restore service after tripping the CB.
If the user wishes to operate the ARC function, the user should set Non for scheme switch
for more information.
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6F2S1914 (0.49)
Chapter Relay application:
GRL200 (Soft 033 & 037)