13
For accuracy at other conditions, see the reference guide.
WattNode Revenue Models:
●
Meets the ANSI C12.1-2008 standard for revenue metering when used with IEEE C57.13
class 0.6 current transformers. Includes a certificate of calibration.
5.2 Measurement
Update Rate:
1.0 second. Internally, all measurements are performed at this rate.
Start-Up Time:
~1.3 second. The meter starts communicating this long after AC voltage is ap-
plied. Energy measurement starts ~300 milliseconds after AC is applied.
Default CT Phase Angle Correction:
0.0 degrees.
5.3 Electrical
Meter Service
Type
Nominal Vac
Line-to-Neutral
Nominal Vac
Line-to-Line
Phases
Wires
3Y-208
120
208–240
1 or 3
2 - 4
3Y-400
230
400
1 or 3
2 - 4
3Y-480
277
480
1 or 3
2 - 4
3Y-600
347
600
1 or 3
2 - 4
3D-240
120*
208–240
1 or 3
2 - 4
3D-400
230*
400
3
2 - 4
3D-480
277*
480
3
2 - 4
Table 2: WattNode Model Service Types
* Note: the delta models have an optional neutral connection that may be used for measuring
wye circuits. In the absence of neutral, voltages are measured with respect to ground. Delta
WattNode models use the phase A and phase B connections for power.
Over-Voltage Limit:
125% of nominal Vac. Extended over-voltage operation can damage the
WattNode and void the warranty.
Over-Current Limit:
120% of rated current. Exceeding 120% of rated current will not harm the
WattNode meter but the current and power will not be measured accurately.
Maximum Surge:
4kV according to EN 61000-4-5, 6kV for WattNode Revenue models.
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 measure-
ment circuitry draws 1-10% of the total (6-96 milliwatts per phase, depending on the model). Due
to the design of the power supply, WattNode meters draw slightly more power at 50 Hz.
Meter
Service
Type
Real
Power
(60 Hz)
Real
Power
(50 Hz)
Power
Factor
Rated
VA
(1)
Power Supply
Range (Vac)
Power Supply
Terminals
3Y-208
1.5 W
1.8 W
0.79
4 VA
96 – 138
N
and
Ø
A
3Y-400
1.6 W
1.8 W
0.73
4 VA
184 – 264
N
and
Ø
A
3Y-480
1.6 W
2.0 W
0.69
4 VA
222 – 318
N
and
Ø
A
3Y-600
1.0 W
1.3 W
0.76
4 VA
278 – 399
N
and
Ø
A
3D-240
1.2 W
1.5 W
0.70
4 VA
166 – 276
Ø
A
and
Ø
B
3D-400
1.1 W
1.4 W
0.67
3 VA
320 – 460
Ø
A
and
Ø
B
3D-480
1.2 W
1.6 W
0.70
3 VA
384 – 552
Ø
A
and
Ø
B
Table 3: Power Consumption and Supply Voltage
(1)
Note: The
Rated VA
is the maximum at 115% of nominal Vac at 50 Hz. This is the same as the
value that appears on the front label of the meter.
