| AC Power Measurement|
for Modbus Networks,
True Power, kWh
VARs, Power Factor,
Individual Phase Measurements
The WattNode Modbus is a kilowatt hour (kWh) energy and power meter that communicates on a EIA RS-485 network, measures 1, 2, or 3 phases with voltages from 120 to 600 volts Vac and currents from 5 to 6,000 amps in delta (phase to phase) and wye (phase to neutral) configurations.
Our diagnostic LEDs provide a per-phase indication of power (green flashing) and negative power (red flashing) to help troubleshoot connection problems, like reversed CTs, or excessive line voltage. The WattNode Modbus meter also has a red/yellow/green communication LED to indicate traffic, configuration problems, bus contention and other conditions. See the manual for full descriptions.
- Supports floating point and integer registers
- True RMS Power: Watts (Phase A, B, C, and sum of all phases)
- Reactive Power: VARs (Phase A, B, C, and sum of all phases)
- Power Factor: (Phase A, B, C, and sum of all phases)
- True RMS Energy: Kilo-Watthours kWh (Phase A, B, C, and sum of all phases)
- Reactive Energy: kVAR-hours (All Phases)
- AC Line Frequency
- RMS Voltage: (Phase A, B, C)
- Computed RMS Current: (Phase A, B, C)
- Peak Demand
- Small form factor for easy installation inside most electrical panels, see a sample installation diagram
- Pluggable screw terminals for easy wiring
- 0.5% accuracy nominal (see manual for details)
- True RMS power even with leading or lagging power factor and chopped or distorted waveforms
- Measure variable speed drive pumps and motors
- Uses safe CT's (current transformers), producing 0.333 Vac at rated current.
- Split core CTs for quick installation
- Solid core CTs are less expensive and prevent tampering
- Bus bar CTs for high current applications (standard and custom sizes)
- UL, cUL Listed - Designed and tested for safety and use throughout North America.
- Assembled in USA, qualified under the Buy American provision in the American Recovery and Reinvestment Act of 2009 (ARRA).
- Five year warranty
Warning: Hazardous Voltages - Only qualified personnel or licensed electricians should install the WattNode meter and current transformers.
Modbus is a registered trademark of Modbus Organization, Inc.