Toshiba GR-200-5 Instruction Manual page 219

Switch of OVN trip command
(ii)
The OVN function issues a trip command for the trip circuit (TRC†) when Trip is set for scheme
switch [OVN1-UseFor] as the normal trip operation. However, when an alarm signal in place
of the trip command is required, the user can set Alarm for the scheme switch [OVN1-UseFor].
†Note: For more information of the trip circuit, see Chapter 2.23.
Execution of OVN function
(iii)
Set On for scheme switch [OVN1-EN]. Otherwise, set Off for the scheme switch [OVN1-EN] if
the OVN1 element is not required to operate.
Scheme logic
2.18.5
From OVN1 to OVN4 logics
Figure 2.18-4 and
Figure 2.18-5 show the OVN function logic. Signal connection point "OVN1_BLOCK" is
provided for the block of the operation of the OVN1 elements.
OVN1-Timer
OVN1-EN
OVN1
OVN1 PU
800001EBB0 OVN1_BLOCK
Block
OVN1-VTFBlk
From VTF
VTF_DETECT
From PROT COMMON
CB_LOSS_PHASE
OVN1-OPT-TRIP
OVN2-OPT-TRIP
OVN3-OPT-TRIP
OVN4-OPT-TRIP
OVN1-OPT-ALARM
OVN2-OPT- ALARM
OVN3-OPT- ALARM
OVN4-OPT- ALARM
OVN1-OPT
OVN2-OPT
OVN3-OPT
OVN4-OPT
DT
IDMT
Original
≥1
On
8000011C23
&
&
8000011C27
≥1
&
1
Figure 2.18-4 OVN1 logic
- 199 -
≥1
≥1
TOVN1
t 0
&
≥1
0.00 to 300.00s
&
Trip
OVN1-UseFor
Alarm
6F2T0207 (0.01)
To TRC
OVN-OPT-TRIP
OVN-OPT-ALARM
OVN-ARC-BLOCK
To Recording
OVN1-OPT
OVN2-OPT
OVN3-OPT
OVN4-OPT
To Grouping logic
8000011B60
OVN1-OPT
8000011B23
OVN1-OPT-TRIP
&
8100021B66
OVN1-OPT-ALARM
&
GRE200 (5,6)