6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 242 -
Figure 2.12-3 Faults occurrences and reset operation when IDMT being applied
2.12.4
Miscellaneous functions
(i)
OV operation blocked by the occurrence of VT failure
Blocking the OV function may be required when a failure in the voltage transformer occurs. In
this case, the user shall set
Block
for scheme switch [
OV1-VTFBlk
].
Non
(as a default) is set
for scheme switch [
OV1-VTFBlk
] in order that the OV function is not blocked by the failure.
(ii)
OV trip signal
The OV function issues a trip command for the trip circuit (TRC†) when
Trip
is set for scheme
switch [
OV1-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 [
OV1-UseFor
].
†Note: For more information about the trip circuit, see Chapter
Relay application: Trip
circuit.
(iii)
Execution of OV function
Set
On
for scheme switch [
OV1-EN
]. Otherwise, set
Off
for the scheme switch [
OV1-EN
] if the
OV1 element is not required to operate.
2.12.5
Scheme logic
Figure 2.12-4 shows the OV1 logic. Signal connection points “OV1_BLOCK” are provided for
the block of the operation of the OV1 element. For testing, the OV1-PU element is provided; it
Condition fault occurrence
Fault observation by the relay
Issue of trip command
Trip level
Incrimination of time counter
corresponding to the fault
duration.
T
1
T
1
: Resetting time set by the user
T
2
: Actual resetting time in the relay operation
T
3
: Time gap between fault occurrence and relay start time
Tripping
T
1
T
1
T
1
T
2
T
2
T
3
Intermittent fault
Series faults
Relay operation reset
Reset of time counter
Increment process in time
counter
Value maintenance of time counter
Содержание GR 200 Series
Страница 1047: ...6F2S1915 0 46 GRZ200 Soft 031 032 1026 Figure 8 3 4 Screen shot from GR TIEMS ...
Страница 1354: ...6F2S1915 0 46 GRZ200 Soft 031 032 1333 Appendix 1 Signal list for common function ...
Страница 1369: ...6F2S1915 0 46 GRZ200 Soft 031 032 1348 Unit mm Panel cut out for 1 2 case size Figure 2 2 3 Panel cutout figure 1 2 size case ...
Страница 1410: ...6F2S1915 0 46 GRZ200 Soft 031 032 1389 This page is intentionally blank ...
Страница 1480: ...6F2S1915 0 46 GRZ200 Soft 031 032 1459 Appendix 6 Ordering ...
Страница 1497: ...6F2S1915 0 46 GRZ200 Soft 031 032 1476 Appendix 7 Technical data ...
Страница 1518: ...6F2S1915 0 46 GRZ200 Soft 031 032 1497 Appendix 8 Manufacture setting ...
Страница 1520: ...6F2S1915 0 46 GRZ200 Soft 031 032 1499 Appendix 9 Matrix between VCT terminals and relay applications ...
Страница 1523: ...6F2S1915 0 46 GRZ200 Soft 031 032 1502 Appendix 10 CT requirement ...
Страница 1531: ...6F2S1915 0 46 GRZ200 Soft 031 032 1510 Appendix 12 Engineering exercise ...
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