Toshiba GR200 Series - (ii) Switch of OVS trip command; (iii) Execution of OVS function; 2.22.5 Scheme logic

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 313 -
failure.
(ii) Switch of OVS trip command
The OVS function issues a trip command for the trip circuit (TRC†) when Trip is set for scheme
switch [OVS1-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 [OVS1-UseFor].
†Note: For more information, see Chapter Relay application: Trip circuit .
(iii) Execution of OVS function
Set On for scheme switch [OVS1-EN]. Otherwise, set Off for the scheme switch [OVS1-EN] if
the OVS1 element is not required to operate.
2.22.5 Scheme logic
Figure 2.22-4 shows the OVS function logic. Signal connection points “OVS1_BLOCK” are
provided for the block of the operation of the OVS elements. For testing, the OVS1-PU element
is provided; it generates a pick-up signal when the entering voltage is excesses of the threshold
anytime. For example, in the IDMT characteristic, using both monitoring points “8000011C20”
and “8000011C24” can facilitate to measure the pickup time after the excess.
&
0.00 to 300.00s
t 0
TOVS1
8000011C20
On
OVS1-EN
1
≥1
OVS1
AB
BC
CA
≥1
8100011C21
8200011C22
8000011B60
8000011C24
OVS1 PU
AB
BC
CA
≥1
8100011C25
8200011C26
8000011B61
&
&
&
&
&
&
Block
800001EBB0 OVS1_BLOCK
&
&
&
&
&
&
t 0
t 0
≥1
≥1
≥1
OVS1-VTFBlk
≥1
Original
OVS1-Timer
IDMT
DT
≥1
&
&
OVS2-OPT-TRIP
OVS2-OPT-ALAR
M
OVS2-OPT-AB
OVS2-OPT-BC
OVS2-OPT-CA
8000011B62
8100011B63
8200011B64
8000011B65
OVS1-UseFor
Alarm
Trip
≥1
≥1
≥1
≥1
≥1
OVS-OPT-AB
OVS-OPT-BC
OVS-OPT-CA
OVS-OPT-TRIP
OVS-OPT-ALARM
OVS-ARC-BLOCK
OVS1-OPT
OVS2-OPT
OVS2-OPT
On
OVS2-EN
810002EBB0 OVS2_BLOCK
OVS2-VTFBlk
OVS2-Timer
OVS2-UseFor
&
From VTF
VTF_DETECT
The logics of OVS2 and OVS2 PU are the same as the
logics of OVS1 and OVS2 PU.
Block
To TRC
Figure 2.22-4 OVS function logics