Siemens SIMOCODE pro System Manual page 434

Mounting, wiring, interfaces
Technical data of the current transformer
• Secondary current:
• Frequency:
• Transformer rating:
• Overcurrent factor:
• Accuracy class:
Example 1:
• 3UF1868-3GA00 current transformer:
– Primary current: 820 A at nominal load
– Secondary current: 1 A
• SIMOCODE pro with 3UF7 100-1AA00-0 current measuring module,
Set current 0.3 to 3 A
This means:
– The secondary current of the current transformer is 1 A at the rated load
and is, therefore, within the 0.3 to 3 A setting range of the current
measuring module used
– The set current I
Main circuit
L1 L2 L3
M
3~
Primary current at
nominal load: 820 A
Fig. 13-21: Example (1 of 2) for current measuring with an 3UF18 external current transformer
13-34
1 A
50 Hz/60 Hz
Recommended > 2.5 VA, according to the secondary
current and cable length
5P10 or 10P10
1
to be parameterized in SIMOCODE pro is 1 A.
s
Secondary circuit
K1
K2
K3
L
3UF18 current transformer
Secondary current: 1 A
Current measuring
module 3UF 71
Basic unit
3UF 70
Adjustment range:
0.3 A - 3 A
Set current I
GWA 4NEB 631 6050-22 DS 03
: 1 A
s
SIMOCODE pro