Siemens SIMOCODE pro C, System Manual

Page: 235 / 408

Mounting, wiring, connecting, system interfaces, configuration guidelines
12.2 Wiring, connecting
SIMOCODE pro
System Manual, 05/2019, A5E40507475002A/RS-AD/004
235
Example 2
● 3UF1868-3GA00 current transformer:
–
Primary current: 205 A at nominal load
– Secondary current: 0.25 A
● SIMOCODE pro with 3UF7100-1AA00-0 current measuring module, current setting
0.3 to 3 A. This means:
–
The secondary current of the current transformer is 0.25 A at rated load and is,
therefore, not within the 0.3 to 3 A setting range of the current measuring module
used.
– The secondary current must be boosted by multiple looping of the secondary cables
through the feed-through openings of the current measuring module. Double-looping
results in 2 x 0.25 A = 0.5 A.
– The current setting I
s
to be parameterized in SIMOCODE pro is 0.5 A.
Figure 12-31 Example (2 of 2) for measuring current with an external 3UF18 current transformer
Note
If the SIMOCODE pro V PB basic unit as from version *E03* is used, the current setting
does not have to be converted but is the same as the nominal primary current.
By additionally entering the transformation ratio of the current transformer (interposing
transformer), conversion will be performed automatically in the device.