Technical data
Accuracy
Normal Operation
Line voltage:
-20% to +15% of nominal
Power factor:
1.0
Frequency:
48 - 62 Hz
Ambient Temperature:
23° C ± 5° C
CT Current:
5% - 100% of rated current
Accuracy:
± 0.5% of reading
Measurement
Update Rate:
0.1 second. Internally, all measurements are performed at this rate.
Startup Time: ~
1.0 second. The Fronius Smart Meter starts communicating this long
after AC voltage is applied. Energy measurement starts 50-100 milliseconds after AC is
applied.
Default CT Phase Angle Correction:
0.0 degrees.
Models and Elec-
trical
Meter Service
Type
Nominal Vac
Line-to-Neutral
Nominal Vac
Line-to-Line
Phases
Wires
240V-3 UL
120
208-240
1 - 3
2 - 4
480V-3 UL
277
480
1 - 3
2 - 4
600V-3 UL
347
600
1 - 3
2 - 4
The Fronius Smart Meter has an optional neutral connection that may be used for meas-
uring wye circuits. In the absence of neutral, voltages are measured with respect to
ground. The Fronius Smart Meter uses the phase L1 (øA) and phase L2 (øB) connec-
tions for power.
Over-Voltage Limit:
125% of nominal Vac. Extended over-voltage operation can dam-
age the Fronius Smart Meter and void the warranty.
Over-Current Limit:
120% of rated current. Exceeding 120% of rated current will not
harm the Fronius Smart Meter but the current and power will not be measured accur-
ately.
Maximum Surge:
4 kV according to EN 61000-4-5
Power Consumption:
The following table shows maximum volt-amperes, the power
supply ranges, typical power consumption, and typical power factors with all three
phases powered at nominal line voltages. The power supply consumes most of the total
power, while the measurement circuitry draws 1-10% of the total (6-96 milliwatts per
phase, depending on the model). Due to the design of the power supply, the Fronius
Smart Meter draws slightly more power at 50 Hz.
Meter
Service
Type
Real
Power
(60 Hz)
Real
Power
(50 Hz)
Powe
r
Facto
r (50
Hz)
Rated
VA *)
Power Supply
Range (Vac)
Power Sup-
ply Termin-
als
240V-3
UL
1.2 W
1.5 W
0.70
4 VA
166 - 276
L1 and L2
480V-3
UL
1.2 W
1.6 W
0.70
3 VA
384 - 552
L1 and L2
19
EN-US
