6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 239 -
2.12.1
Drop-off and pickup characteristic
Figure 2.12-1 shows the characteristic of the OV element. The outer circle shows the threshold
of pick-up threshold voltage (PU), whereas the inner dotted circle shows drop-off voltage point
(DO). The hatched area shows the operation area of the OV.
V
V
Pickup
0
Dropoff
Figure 2.12-1 Characteristic of OV element
For example, with regard to the OV1 element, suppose the user sets a pick-up value in
P.U for setting [
OV1
]. Then the user should set a drop-off value using setting [
OV1-DPR
], which
configures the ratio of the PU to the DO.
2.12.2
Delay for the operation of the OV element
The OV element has a delay timer for the operation. For the OV1 element, the user can set a
delay time using setting [
TOV1
]. The user can find the delay timer in the OV function logic.
(See section 2.12.5)
2.12.3
Time characteristic
The OV element has two characteristics between a voltage condition and an operation time;
hence, the user should select a mode either (i) definite (independent) time characteristic delay
or (ii) inverse (dependent) time characteristic delay. For the definite time characteristic delay,
the operation time is a constant. In the inverse time characteristic delay, the operation time
depends upon the level of the voltage condition.
(i)
Definite time characteristic (DT)
To operate the definite (independent) time delay, set
DT
for scheme switch [
OV1-Timer
].
Resetting the OV element is performed when a voltage falls below the drop-off voltage.
(ii)
Invers time characteristic (IDMT)
To operate the dependent (invers) time delay, set
IDMT
for scheme switch [
OV1-Timer
].
Pick-up characteristic
The operate time of the inverse (dependent) time characteristic is inversely proportional to the
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 ...
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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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