New Industry Products

Inepro Launches “Smallest in Class” 3-Phase Metering

October 15, 2023 by Jake Hertz

The solution aims to address the needs of space-sensitive applications like charging solutions and lamposts. Here, we’ll examine three-phase systems, metering solutions, and the PRO380-Compact from inepro.

In many cases, the value of electrification systems only goes so far as we can control and monitor them. For this reason, electrical metering solutions have long been integral to any power system, ranging from industrial machinery to public facilities.


EV charging.

EV charging. Image used courtesy of Adobe Stock


Recently, inepro Metering released its PRO380-Compact metering system, which they claim is the smallest three-phase metering system in its class. 


What Is a Three-Phase System?

A three-phase electrical system is a common method of alternating current (AC) power generation, transmission, and distribution.


A three-phase system consists of three waveforms, each 120 degrees out of phase with each other.

A three-phase system consists of three waveforms, each 120 degrees out of phase with each other. Image used courtesy of Myatt et al.

Three-phase systems use three separate AC waveforms to distribute electrical power. These waveforms are generated simultaneously but are out of phase with each other by 120 degrees. This phase offset ensures a more constant and balanced power supply than a single-phase system, which only uses one AC waveform.

The three-phase system is particularly advantageous for powering heavy machinery and equipment requiring a consistent and stable electricity supply. The three separate phases allow balancing loads more effectively, reducing the risk of voltage drops or power losses. This is crucial in settings like manufacturing plants, where even a brief loss of power can result in significant operational disruptions.


Three-Phase Metering

In such environments, a three-phase energy meter is necessary for monitoring and managing electrical consumption. 


Example three-phase power meter.

Example three-phase power meter. Image used courtesy of NXP Semiconductors 


The primary function of a three-phase meter is to accurately measure the energy consumed and to relay this information for billing, monitoring, or control purposes. Advanced models come with features like Modbus support, enabling seamless integration into existing automation systems for real-time monitoring and control. This allows for more efficient energy management, enabling operators to promptly identify inefficiencies and implement corrective measures. For instance, sudden spikes in energy usage could indicate a malfunctioning piece of equipment that needs immediate attention.

Accuracy is another critical aspect, especially in industrial settings where even a small error in energy measurement can translate into significant financial implications. This is why many three-phase meters are MID-approved, ensuring they meet stringent accuracy standards set by the Measuring Instruments Directive. 


Inepro’s Solution

Recently, inepro released its three-phase metering solution PRO380-Compact product.


A profile of the PRO380-Compact.

A profile of the PRO380-Compact. Image used courtesy of inepro Metering


The PRO380-Compact is a MID-approved energy meter designed specifically to address the need for more compact and efficient energy metering. To this end, the product comes in a 12 cm x 6.5 cm x 2 cm form factor, making it ideal for space-sensitive applications like charging stations.

Other notable features include Modbus support for integration into existing systems, an LED display for an easy user interface, and a current rating of up to 45 A. With this product, the company hopes to serve the needs of underserved urban applications and allow for ease of monitoring and control over new electrification solutions.