In essence, VFDs are devices which convert or manipulate a motor's input frequency, voltage, and/or current.
So you might be wondering: can I still get reliable power and energy data for my motor if it has a VFD?
The answer is yes, as long as the meter sensors (CTs) are installed correctly.
Our Gateways measure both current and voltage, providing greater accuracy than many other meters on the market. Voltage is measured through the voltage taps (spare breakers) on the electrical panel, and current is measured by CT sensors on each load wire.
⚠️ To ensure accuracy, it's important that the voltage and current are both measured upstream of the VFD.
In other words, the CTs must be installed between the voltage tap panel and the VFD. The CTs should not be installed between the VFD and the motor.
Contact Support if you have more questions about VFDs.