6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 220 -
2.9.2
Characteristic and setting
The hatched area of Figure 2.9-2 illustrates the BCD characteristic; the BCD function will
operate when the positive sequence current (I1) is larger than 0.04×In, the negative sequence
current (I2) is larger than 0.01×In, and the ratio
|I
2
/I
1
| is higher than setting [
BCD
].
Figure 2.9-2 Characteristic of BCD
2.9.3
Miscellaneous functions
(i)
Harmonic detection function
The operation of BCD can be blocked when the IED detects 2
nd
harmonic caused by the
phenomenon of magnetizing inrush current when a transformer is energized. To block the
operation of the BCD function during the occurrence of the harmonic, set scheme switch [
BCD-
2fBlk
]
Block
.
(ii)
Block operation of CTF for BCD
The operation of the BCD function can be blocked by the current transformer failure (CTF)
function using a scheme switch.
Block
is set for scheme switch [
BCD-CTFBlk
] if the user wishes
to disable the operation of the BCD function when a current transformer failure occurs.
I
1
I
2
0.01×In
0.04×In
o
|𝐼
2
|
|𝐼
1
|
൘
≥ 𝐵𝐶𝐷 𝑠𝑒𝑡𝑡𝑖𝑛𝑔
|𝐼
1
| ≥ 0.04 × 𝐼𝑛
|𝐼
2
| ≥ 0.01 × 𝐼𝑛
&
BCD
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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