Technical data
Accuracy
Normal Operation
Line voltage:
90 - 347 Vac (Line to Neutral), 120 - 600 Vac (Line to Line)
Power factor:
1.0
Frequency:
45 - 65 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 milli-
seconds 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
WR
90-347
120-600
1 - 3
2 - 4
The Fronius Smart Meter has an optional neutral connection that may be used
for measuring 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) connections for power.
Over-Voltage Limit:
125% of nominal Vac. Extended over-voltage operation can
damage 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 meas-
ured accurately.
Maximum Surge:
4 kV according to EN 61000-4-5
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Summary of Contents for WND-WR-MB
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