Toshiba GR200 Series Instruction Manual page 303

DFRQ scheme logic
(iv)
Figure 2.17-4 shows the scheme logic of the DFRQ function. Each stage operates independently.
PLC connection point "DFRQ1-BLOCK" is provided to block the stage1; hence the user can
connect an external signal to this PLC connection point when the external signal is provided
to block the stage 1. (For more information of PLC function, see Chapter PLC function)
The signal of the under-voltage block (FRQBLK) element is provided from the FRQ logic.
From FRQ
NON FRQBLK
&
RISE
DFRQ1
1
DOWN
&
OverFrq
UnderFrq
FFRQ1-Chara
&
RISE
DFRQ2
1
DOWN
&
OverFrq
UnderFrq
DFRQ2-Chara
&
RISE
DFRQ6
1
DOWN
&
OverFrq
UnderFrq
DFRQ6-Chara
On
DFRQ1-EN
On
DFRQ2-EN
On
DFRQ6-EN
1
800011EBB0 DFRQ1-BLOCK
1
810012EBB0 DFRQ2-BLOCK
1
850016EBB0 DFRQ6-BLOCK
Figure 2.17-4 Scheme Logic of Frequency Rate-of-change Protection
8000111C23
≥1
& &
8100121C23
≥1
& &
8500161C23
≥1
& &
- 282 -
8000111BB1
8000111B60
800011EBB1 FRQ-S1-OPT
Trip
DFRQ1-UseFor
Alarm
8100121BB1
8100121B60
810012EBB1 FRQ-S2-OPT
Trip
DFRQ2-UseFor
Alarm
8500161BB1
8500161B60
850016EBB1 FRQ-S6-OPT
Trip
DFRQ6-UseFor
Alarm
6F2S1915 (0.46)
DFRQ-S1-OPT
&
≥1
DFRQ-OPT-TRIP
&
DFRQ-OPT-ALARM
DFRQ-ARC-BLOCK
DFRQ-S2-OPT
&
&
DFRQ-S6-OPT
&
≥1
&
GRZ200 (Soft 031 & 032)
To TRC
(2.53.1)