Toshiba GR200 Series Instruction Manual page 75

CBF Zone-trip and Transfer-trip
(iii)
The scheme switch [CBF-Trip_CH*] controls the 'Zone-trip' and 'Transfer-trip' schemes
in the CH*. If [CBF-Trip_CH*]=On, both 'Zone-trip' and 'Transfer-trip' signals will be issued to
the TRC regardless of the 'Re-trip' operation (See section 2.2.4(i) to (iii)). If [CBF-
Trip_CH*]=On-AftRe, 'Zone-trip' and 'Transfer-trip' will be issued only after the operation 'Re-
trip' (see section 2.2.4(iv)).
Zone-trip scheme: the 'ZONE.OPT' decision is made in each CH (see Figure 2.2-4○
decisions in respective CHs are combined into a single one and are distributed for six zones
(see Figure 2.2-5○
e
function (see Figure 2.2-6)
Transfer-trip scheme: the 'OPT' decision is made in each CH (see Figure 2.2-4○
is transferred to the output logics for the TRC function (see Figure 2.2-6).
Table 2.2-6 CBF Zone and Transfer-trip setting switch
Setting items Mode
Off
On
CBF-Trip_CH
On-T
When the CBF re-trip, Zone-trip, and Transfer-trip need to operate securely, set On for
setting [CBFTP-FS]. All CBF re-trip, Zone-trip, and Transfer-trip will be issued with the Fail-
safe operation (FS). On the other hand, all CBF re-trip, Zone-trip, and Transfer-trip operate
without the FS operation when Off is set for the setting [CBFTP-FS] (For more information,
Relay application: Fail safe
see chapter
Table 2.2-6 FS switch for CBF re-trip/Zone-trip/Transfer-trip
Setting items Mode
Off
CBFTP-FS
On
). The distributed signals are transferred to the output logics for the TRC
Canceling for Zone and Transfer-trip
Operation for Zone and Transfer-trip
Zone and Transfer-trip issued after OCCBF-CH operation
).
CBF trip issued with FS operation
CBF trip issued without FS operation
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Contents
Contents
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)
6F2S1931 (0.20)
); the
c
). The decision
d
Default
On
Default
Off