Toshiba GR200 Series - (ii) ZG logic

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 139 -
To TRC
To DISCAR
≥1
SOTF-Z1S-OPT
SOTF-Z1XS-OPT
SOTF-Z2S-OPT
SOTF-Z3S-OPT
SOTF-Z4S-OPT
SOTF-Z5S-OPT
SOTF-Z1S-OPT-AB
SOTF-Z1S-OPT-BC
SOTF-Z1S-OPT-CA
SOTF-ZS-OPT-ABR
SOTF-ZS-OPT-BCR
SOTF-ZS-OPT-CAR
≥1
SOTF-ZS-OPT-TRIP
From Z1S to Z5S logics
SOTF-ZS-ARC-BLOCK
SOTF-Z1XS-OPT-AB
SOTF-Z1XS-OPT-BC
SOTF-Z1XS-OPT-CA
SOTF-Z2S-OPT-AB
SOTF-Z2S-OPT-BC
SOTF-Z2S-OPT-CA
SOTF-Z3S-OPT-AB
SOTF-Z3S-OPT-BC
SOTF-Z3S-OPT-CA
SOTF-Z4S-OPT-AB
SOTF-Z4S-OPT-BC
SOTF-Z4S-OPT-CA
SOTF-Z5S-OPT-AB
SOTF-Z5S-OPT-BC
SOTF-Z5S-OPT-CA
≥1
≥1
8C00001B66
8D00001B67
8E00001B68
8300001B28
Figure 2.10-44 SOTF-ZS grouping logic for TRC/Recording functions
(ii) ZG logic
Figure 2.10-45 to Figure 2.10-50 to shows the ZG logics and corresponding SOTF logics. All
logic operations (Z1G, Z1GX, Z2G, Z3G, Z4G, and Z5G) can be selected using the scheme
switches. Scheme switch [Z*G-EFL] is used to select the EFL element for the detection of earth
faults; when the EFL element operates, detection of the PSB is canceled.
Scheme switch [Z*G-LPBlk] is used to enable blocking of the operation of the leading-
phase-block function. The ARC_BLOCK signals allow the Z*G element to perform final three-
phase tripping for all faults. The Z*G_3PTP configures the Z*G element to perform the three-
phase trip.