Toshiba GR200 Series - (iv) DFRQ scheme logic

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 344 -
(iv) DFRQ scheme logic
Figure 2.26-4 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.
FFRQ1-Chara
DFRQ-S1-OPT
8100121C23
8100121B60
810012EBB1 FRQ-S2-OPT
&
&
Alarm
DFRQ2-UseFor
Trip
≥1
&
&
&
&
1
8000111C23
8000111B60
RISE
DFRQ1
DOWN
800011EBB1 FRQ-S1-OPT
8000111BB1
&
&
Alarm
DFRQ1-UseFor
Trip
≥1
&
&
&
&
1
≥1
≥1
8500161C23
8500161B60
850016EBB1 FRQ-S6-OPT
&
&
Alarm
DFRQ6-UseFor
Trip
≥1
&
&
&
&
1
DFRQ-S2-OPT
DFRQ-S6-OPT
DFRQ-OPT-TRIP
DFRQ-ARC-BLOCK
DFRQ-OPT-ALARM
To TRC
OverFrq
UnderFrq
DFRQ2-Chara
OverFrq
UnderFrq
DFRQ6-Chara
OverFrq
UnderFrq
DFRQ1-EN
On
DFRQ2-EN
On
DFRQ6-EN
On
1
800011EBB0 DFRQ1-BLOCK
1
810012EBB0 DFRQ2-BLOCK
1
850016EBB0 DFRQ6-BLOCK
8100121BB1
8500161BB1
NON FRQBLK
From FRQ
RISE
DFRQ2
DOWN
RISE
DFRQ6
DOWN
Figure 2.26-4 Scheme Logic of Frequency Rate-of-change Protection
(2.53.1)