Siemens 7XT3300-0 A00 Series

English 7XT3300-0*A00
48 C53000-B1175-C129-1
Connection Examples
Figure 9 Connection of the 7XT33 to a DC-voltage supply via a 2-A protective switch
Figure 10 Connection of the 100 % stator earth protection with earthing or neutral
transformer
NOTE
To ensure proper functioning of the 20-Hz protection principle, the load
resistance R
L
must be > 0.5 Ω.
U
H+
U
H-
1
2
1
3
2 A
2
4
5SY5202-7 7XT33
+
-
7XT34
7XT33
7UM62
Protection Cubicle
20-Hz Bandpass
20-Hz Generator
max. 3 A (20 Hz)
Burden < 0.5 Ω
400 A/5 A
1FS5
15 VA
1A1
1A4
1B 1 1B4
11
12
R13
R14
J8
J7
P1
P2
S2 S1
U
E
I
EE1
R
L
> 0.5 Ω
1A2 1A3
330 Ω
660 Ω
660 Ω
U
NG
/√3
500 V
20 Hz
U
N
3
ab
Neutral
Transformer
500 V
3
Earthing
Transformer
a
b
Generator
to Generator
Step-up Transformer
*1
*1: Line twisted