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Applications
The biased differential relay SPAD 330 C used
for the winding short-circuit and interturn fault
Example 1.
protection of a YNd11 connected power trans-
10
P2
P1
.
S2
S1
Setting of the matching of the power transformer
vector group:
former, when the current transformers have
"in-side" earthings, i.e. the current transformers
have the basic connection type I.
P1
P2
.
S1
S2
Switch
1
2
3
4
5
6
L1
L2
L3
SG1
0
1
0
0
0
0
∑ = 2
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