Mounting
Rigid or hinged.
Rigid is usually less expensive and often has better performance and accuracy values.
Hinged current transformers can be opened for mounting on the conductor. To prevent
unintentional opening, a plastic cable tie can be attached to the current transformer.
Hinged current transformers can be installed in a system without interrupting the voltage.
Connecting the
current trans-
formers
-
Make sure that the current transformers match the voltage phases.
Make sure that current transformer L1 measures the current on the same phase that
is monitored by voltage input L1. The same applies for phases L2 and L3.
-
Make sure that the current transformers are pointing in the correct direction.
Observe the data sheet for the current transformer.
Attach the current transformers to the conductor to be measured and connect the current
transformer cables to the Fronius Smart Meter. Always switch off the power supply
before disconnecting live conductors.
The current transformers are connected to connections 1 and 3; 4 and 6; 7 and 9. If
necessary, excessively long cables can be shortened accordingly. Observe the sequence
in which the phases are connected. Accurate power measurement is only ensured if the
mains voltage phases match the current phases.
Suitable voltage
transformers
Suitable voltage transformers: Only voltage transformers with a voltage range of 210 to
440 V (phase-to-phase) may be used. The voltage transformers must be connected to
terminals 2, 5, 8 and 11 at the point of direct voltage measurement.
Connecting the
data communica-
tion cable to the
inverter
Connect the data communication connections of the Fronius Smart Meter to the Fronius
system monitoring in the inverter.
-
Connect 35 (Fronius Smart Meter) to - (Fronius inverter)
-
Connect 34 (Fronius Smart Meter) to D- (Fronius inverter)
-
Connect 33 (Fronius Smart Meter TS) to D+ (Fronius inverter)
-
Several Smart Meters can be installed in the system, see chapter
12