Siemens SICAM A8000 Series Manual page 78

Standard I/O Modules
2.10.6 External Circuitry
The following circuitry variants are examples and not related exclusively to the shown values.
Danger
Works on the circuitry may be performed in de-energized state only!
During electrical installation, all the rules and regulations of power systems must be considered.
Danger
Open transformer circuits will result in electric shock and arc flashover.
Will cause death, serious injury or considerable property damage.
Only measure current with external current transformers. Do not use fuses for circuit protection. Do not
open the secondary circuit under load. Short circuit the secondary current terminals of the current
transformers before removing this device. The safety information for the current transformers used must
be followed.
2.10.6.1.1 3-Phase Current
Through the current inputs I1_P/I1_N, I2_P/I2_N, I3_P/I3_N the corresponding phase currents
are measured.
S1
P1
For further examples refer to 2.8.6,
78
S2
P2
S1 S2
P1
P2
S1 S2
P1 P2
External Circuitry
Unrestricted
CM-8820
AI-8510
(AI-8510).
SICAM A8000 Series, SICAM I/O Modules
DC8-012-2.06, Edition 09.2019