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Switch of OVS trip signal
(ii)
The OVS function issues a trip signal 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 signal is required, the user can set Alarm for the scheme switch [OVS1-UseFor].
†Note: For more information of the trip circuit, see Chapter 2.23.
Execution of OVS function
(iii)
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.
Scheme logic
2.16.5
Figure 2.16-4 shows the OVS function logic. Signal connection points "OVS*_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.
DT
IDMT
OVS1-Timer
Original
OVS1-EN
On
8000011C20
AB
8100011C21
OVS1
BC
8200011C22
CA
8000011B60
≥1
8000011C24
AB
8100011C25
OVS1 PU
BC
8200011C26
CA
8000011B61
≥1
800001EBB0 OV1_BLOCK
Block
OVS1-VTFBlk
From VTF
VTF_DETECT
≥1
&
&
&
&
&
&
≥1
1
&
Figure 2.16-4 OVS1 logic
- 180 -
TOVS1
t
0
&
≥1
t
0
&
≥1
t
0
&
≥1
0.00 to 300.00s
&
≥1
&
&
&
&
Trip
OVS1-UseFor
Alarm
6F2T0207 (0.01)
To Grouping logic
8000011B62
OVS1-OPT-AB
8100011B63
OVS1-OPT-BC
8200011B64
OVS1-OPT-CA
8000011B65
OVS1-OPT
8000011B23
OVS1-OPT-TRIP
8100011B66
OVS1-OPT-ALARM
OVS1-ARC-BLOCK
GRE200 (5,6)
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