WND-WR-MB-Inst-1.03
Page 13 of 16
Power Supply Power Factor:
typically 0.6
Nominal Line-to-Neutral Vac:
100 to 347 Vac
Nominal Line-to-Line Vac:
120 to 600 Vac
Over-Current Limit:
200% of rated current. Exceeding 200% of rated current will not harm the
WattNode meter but the current and power will not be measured accurately.
Maximum Surge:
EN 61000-4-5: 4kV, ANSI C12.1: 6kV, 1.2/50 μs — 8/20 μs
Operating Frequencies:
50/60 Hz
Measurement Category:
The line voltage measurement terminals on the meter are rated for CAT
III, 600 Vac
Measurement Category III is for measurements performed in the building installation. Examples
are measurements on distribution boards, circuit-breakers, wiring, including cables, bus-bars,
junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial use
and some other equipment, for example, stationary motors with permanent connection to the fixed
installation.
Current Transformer Inputs:
Voltage Mode:
Nominal Input Voltage (At CT Rated Current):
0.33333 Vac RMS
Absolute Maximum Input Voltage:
5.0 Vac RMS
Input Impedance at 50/60 Hz:
23 kΩ
Current Mode (Opt MA):
Nominal Input Current (At CT Rated Current):
40 mA RMS
Absolute Maximum Input Current:
200 mA RMS
Input Impedance at 50/60 Hz:
10 Ω
5.3 EIA RS-485 Interface
RS-485 Output Isolation:
4500 Vac RMS
Driver Output:
●
Voltage (Open Circuit)
: ±6 Vdc maximum
●
Voltage (54 Ω load)
: ±1.5 Vdc minimum
●
Current (54 Ω load)
: ±60 mA typical
●
Rise Time (54 Ω || 50 pF load)
: 900 nS typical
Receiver:
●
Common-Mode Range
: -7 Vdc to +12 Vdc max
●
Sensitivity
: ±200 mV
●
Bus Load
: 1/8 unit load (up to 64 meters)
●
Failsafe Modes
: bus open, shorted, and idle
5.4 Certifications
Safety:
●
UL 61010-1:
3rd Edition, UL file number E359088
●
CAN/CSA-C22.2 No. 61010-1-12
●
IEC 61010-1:2010
Emissions:
●
FCC Part 15:
Class B, radiated and conducted emissions
●
CISPR / EN 55022:
1994, Class B, radiated and conducted emissions
EMC Requirements:
EN 61326-1: 2013, industrial locations
●
Electrostatic Discharge
: EN/IEC 61000-4-2: (B) Self-Recovering
●
Radiated RF Immunity
: EN/IEC 61000-4-3: (A) No Degradation
●
Electrical Fast Transient / Burst
: EN/IEC 61000-4-4: (A) No Degradation
