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Disconnecting devices must be mounted within sight and as close as possible to the
Fronius Smart Meter; they must also be easy to use.
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The disconnecting devices must satisfy the requirements of IEC 60947-1 and IEC
60947-3, as well as all national and local regulations for electrical systems.
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Use overcurrent protection rated for max. 63 A.
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To monitor more than one mains voltage, use connected automatic circuit breakers.
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The overcurrent protection must protect the mains terminals marked L1, L2 and L3.
In rare cases, the neutral conductor has an overcurrent protection which must simul-
taneously interrupt neutral and unearthed lines.
Cabling
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Always switch off the power supply before connecting the mains voltage inputs to
the Fronius Smart Meter.
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Connection cross-section:
•
Wire (rigid): min. 0.05 mm² / max. 4 mm²
•
Wire (flexible): min. 0.05 mm² / max. 2.5 mm²
•
Recommended torque: 0.5 Nm / max. 0.8 Nm
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Do not lay more than one cable per screw terminal. Use terminal blocks if neces-
sary.
The measuring inputs of the current transformers must be earthed on one side as shown
in the circuit diagram.
Connect each voltage line to the terminal strip as shown in the graphics below.
9
EN