Load / Source
S1
S2
S1 S2
< 20 A
CT1
CT1 CT2
CT2
2 phases, 3 conductors (CT connection)
Suitable current
transformers
It is recommended to use Fronius CT current transformers (item numbers
41,0010,0104 / 41,0010,0105 / 41,0010,0232). To ensure smooth operation of
the Fronius Smart Meter IP and accurate measurement results, all connected
current transformers must meet these requirements:
-
The current transformer must generate 333 mV at nominal current. The
nominal current of the current transformers is listed in the data sheet for the
current transformer.
-
Do not use current transformers with 1 ampere or 5 ampere output current.
-
Observe the maximum input current according to the data sheets of the cur-
rent transformers.
-
Do not use Rogowski coils for measurement purposes.
-
Hinged and rigid current transformers can be mounted. Rigid current trans-
formers often have better power and accuracy values. Hinged current trans-
formers have a split core and can be opened for mounting on the conductor
and installed in a system without interrupting the voltage.
CAUTION!
Risk of electric shock due to unintentional opening of hinged current trans-
formers
This can result in severe injury and damage to property.
▶
Switch off the current when working on the current transformers.
▶
Attach a plastic cable tie to the current transformer to prevent unintentional
opening.
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