Toshiba GR200 Series Instruction Manual page 392

VTF Logic
2.30.3
Figure 2.30-1 shows the logics of the VTF function. As described earlier, the VT failure is
grouped into the VTF1 criterion (VTF1_DETECT) and the VTF2 criterion (VTF2_DETECT).
When we consider the VTF1 criterion, the upper logic in Figure 2.30-1 is used; whereas we
consider the VTF2 criterion, lower one is used.
The user can select either the VTF1 or VTF2 criteria using the using the scheme switch
[VTF1EN] or [VTF2EN].
VTF1 DETECT
8000001C20
A
≥1
8100001C21
B
UVVTF
8200001C22
C
From PROT-CCOMMON 1
OCD-AT
≥1
OCD-BT
OCD-CT
On
VTF1-EN OPT-On
VTF2 DETECT
8800001C27
OVGVTF
1
8400001C28
EFVTF
On
VTF2-EN OPT-On
From PROT-COMMON 1
CB_ALLPH_CLOSE
From DISTANSE-ZS 2
PSBS-VTF-BLK
From DISTANSE-ZG 2
PSBG-VTF-BLK
From test
AMF_OFF 1
VTF_BLOCK
800000EBB0
810000EBB1 EXTERNAL_VTF
Note: Signal CB_ALLPH_CLOSE is provided from Protection common function
1
(PROT_COMMON). The OCD relay is used for both the VTF1 DETECT and the
VTF2 DETECT. For more information, see Chapter
common
Note: Entering signals coming from distance protections (ZS/ZG) are available if the
2
ZS/ZG protections are provided in the IED. For more information with regard to
1
1
S
&
≥1
R
&
1
t 0
1
&
10.0s
≥1
1
≥1
S
&
≥1
R
&
1
&
≥1
1
0. 2s
1
≥1
8100001BB1
Figure 2.30-1 Scheme logic in the VTF function
.
&
t 0
S
t 0
≥1
0.015s
R
1
0.1s
&
t 0
S
t 0
≥1
0.015s
R
1
0.1s
- 369 -
6F2S1914 (0.49)
8100011C60
8000001B61
≥1
t 0
VTF1_ALARM
10.0s
8200021C60
8200021C60
≥1
t 0
VTF2_ALARM
10.0s
≥1
800000B62
VTF_ALARM
To Automatic supervision
To OC 3
To EF
3
To UV 3
To UVS
To OV 3
To OVS
To OVG
To OCN
To DEFCAR
To DISTANCE-COMMON
8000001B61
≥1
VTF_DETECT
Relay application: Protection
GRL200 (Soft 033 & 037)
3
3
3
3
3
3