6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 1137 -
10.4.1
Operation of sigma Iy
When the value ‘n’ is provided as the number of the fault currents, equation (10.4-1) is satisfied:
∑ I
Y
=I
1
y
+I
2
y
+I
3
y
+⋯+I
n
y
(10.4-1)
As setting for a conventional CB with regard to the parameter ‘y’, the user can set a value
‘
2.0
’ for the [
SIGMA_IY-Y
]; that is, the accumulation is performed with the fault currents
squared (
I
2
). On the other hand, the user can be required to set a less value (say ‘
1.0
’) for the
[
SIGMA_IY-Y
] when a special CB is required (that is, for the high voltage system).
Figure 10.4-1 Concept of Sigma_Iy function
The sigma_Iy function can designed to issue an alarm when the synthesized broken
current value reaches an alarm level set by [
SIGMA_IY-Alarm
]; issuing an alarm is ready when
the user sets
On
for scheme switch [
SIGMA_IY-AEN
].
I1
Maximum broken current
at the first
Command issuing #1
Tripping CB
In
Maximum broken current
at the n
th
Command issuing #n
Tripping CB
Command issuing #2
∑ I
Y
=I
1
y
+I
2
y
+I
3
y
+⋯+I
n
y
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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