Toshiba GR200 Series Instruction Manual

Also see for GRB200: Instruction manual

6F2S1931 (0.20)Centralized GRB200(Soft: 030, 031, 032, 033, 034)- 30 -2.1.6 Protection for respective zones (DIFCH, DIFZA to DIFZF)(i) DIF protection schemeFigure 2.1-10 illustrates the logics of DIFZA etc. relays and DIFCH relay. The user can set Offfor the scheme switch [DIF-EN] when wishing to block issuing trip signals. In the DIF function,CT fail detection (CTF) and differential current monitoring (ISDV) are provided so thatblocking signals can be injected into the relay if the CTF and ISDV elements operate. TheFigure 2.1-10 also illustrates the DIF operation signals for the individual phases of therespective zones after being rationalised using OR logic; they are sent for the TRC function viathe logics shown in Figure 2.1-11.&DIFZA ABC&&1DIFZA_BLOCK800010EBB0&&DIFZB ABC&&1DIFZB_BLOCK810020EBB0&&DIFZF ABC &&1DIFZF_BLOCK850060EBB0Discriminating ZoneCheck Zone&DIFCH ABC&&1&&&&&&&&&&≥1 DIF.OPT-ZAXDIFTP-FORMDZCHCH&DZ≥1DIFCH-OPT1 &DIF-EN On&≥1≥1≥18000101C208100101C218200101C228400201C208500201C218600201C228400601C208400601C218400601C228000F01C208100F01C218200F01C228000F01B628100F01B638200F01B648E00F01B618000101B628100101B638200101B648400201B628500201B638600201B648400601B628500601B638600601B64DIF.ZA-OPT-ADIF.ZA-OPT-BDIF.ZA-OPT-CDIFCH-OPT-ADIFCH-OPT-CDIFCH-OPT-BDIFCH_BLOCK8E0000EBB0DIF_BLOCK8F0000EBB1DIF.ZB-OPT-ADIF.ZB-OPT-BDIF.ZB-OPT-CDIF.ZF-OPT-ADIF.ZF-OPT-BDIF.ZF-OPT-C8000101B618100201B618500601B61IDSVZA-NO-BLKCTFZA-NO-BLKIDSVZB-NO-BLKCTFZB-NO-BLKIDSVZD-NO-BLKCTFZD-NO-BLKIDSVCH-NO-BLKCTFCH-NO-BLK≥1≥1≥1≥1&≥1DIF-OPT-ZBDIF-OPT-ZFTo Distribution logic≥1ADD.DIF.TP-ZA800110EBB0≥1ADD.DIF.TP-ZB810120EBB0≥1ADD.DIF.TP-ZF850160EBB0TTTDIF-OPT-CHSSSPPPSSSPPPSSSPPPSSSPPP8000101B708001101BB08000101B708106201BB08500601B708501601BB08000101BB08100201BB08500601BB08E0000EBB08F00001BB0Figure 2.1-10 DIF protection logicNote: Signals ○P comes from Figure 2.1-16, whilst signals ○S come from Figure 2.1-17.Signals T are sent to Figure 2.1-11.