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Functions
2.1
Introduction, Reference Power System
Generator
16
The following chapters explain the individual protective and additional functions and
provide information about on the setting values.
The calculation examples are based on two reference power systems with the two
typical basic connections, i.e. the busbar connection and the unit connection (see
Figure 2-1). All default settings of the relay are adapted accordingly. The allocation of
measured quantities to side 1 and 2 respectively is shown in Figure 2-1.
Side 2
5.27 MVA
6.3 kV
500 A/1 A
I
L, S2
a) Busbar connection
Side 2
6.3 kV
/ 500 V
500 A/1 A
√3
U
E
b) Unit connection
Figure 2-1
Reference Systems
6.3 kV
60/1 A
√3
G
3∼
I
EE
7UM62
5.27 MVA
6.3 kV
6.3 kV
√3
G
3∼
I
I
U
L, S2
EE1
L
7UM62
Side 1
100 V
100 V
√3
3
U
I
U
L, S1
L
E
Side 1
5.3 MVA
20 kV/6.3 kV
100 V
√3
I
L, S1
C53000-G1176-C149-3
Earthing
trans-
former
R
L
20 kV
7UM62 Manual
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