0102030405
China Power Meter Suppliers - Accurate Measurement of Active & Reactive Power | Factory Direct Solutions
Expanded Technical Specification: Power Meters for Active and Reactive Power — Measuring Range & Configuration Overview
This series of power meters is engineered to accurately measure active power (real power consumed or supplied by a load) and reactive power (power stored and released by inductive/capacitive components) across three core electrical system configurations, as detailed below.
1
Single-Phase (1P) Power Meter for Active and Reactive Power
System Compatibility: Designed for single-phase AC electrical systems, commonly deployed in residential, light commercial, and small-scale industrial applications.
| Parameter | Specification |
|---|---|
| Rated Voltage Input | 100 V, 220 V |
| Rated Current Input | Via external CTs — secondary rating: 1 A or 5 A |
●
The primary current rating (designated as X) is dictated by the ratio of the paired CT (e.g., 50 A/5 A, 100 A/5 A, 200 A/1 A). This flexible CT-matching design allows the meter to accommodate a broad range of primary current measurements, tailored to specific system load requirements.
2
Three-Phase Three-Wire (3P3W) Power Meter for Active and Reactive Power
System Compatibility: Optimized for three-phase three-wire AC systems, typically used in high-power industrial machinery, utility transmission lines, and balanced three-phase load environments (where no neutral conductor is required).
| Parameter | Specification |
|---|---|
| Rated Voltage Input | 100 V, 220 V, 380 V, 440 V |
| Rated Current Input | Via external CTs — secondary rating: 1 A or 5 A |
●
The primary current capacity (X) is determined by the CT ratio selected for the application, ensuring compatibility with low to high primary current ranges (e.g., 100 A, 500 A, 1000 A) for diverse industrial load monitoring needs.
3
Three-Phase Four-Wire (3P4W) Power Meter for Active and Reactive Power
System Compatibility: Suited for three-phase four-wire AC systems, which are widely used in commercial buildings, data centers, and unbalanced three-phase load scenarios (where a neutral conductor is necessary to carry unbalanced currents).
| Parameter | Specification |
|---|---|
| Rated Voltage Input | 100 V, 220 V, 380 V, 440 V |
| Rated Current Input | Via external CTs — secondary rating: 1 A or 5 A |
●
Similar to the 3P3W variant, the primary current range (X) is defined by the CT ratio, enabling precise measurement of active and reactive power for both balanced and unbalanced three-phase loads.
❓ Frequently Asked Questions (FAQ)
Q What is the difference between active power and reactive power measured by these meters?
Active power (real power) refers to the actual energy consumed or supplied by a load and is measured in watts (W). Reactive power refers to the energy stored and released by inductive or capacitive components in a circuit, measured in VAR. These meters are designed to accurately capture both values across all supported system configurations.
Q Which power meter configuration is suitable for residential applications?
The Single-Phase (1P) power meter is ideal for residential, light commercial, and small-scale industrial applications. It supports rated voltage inputs of 100 V and 220 V, which are standard in most household electrical systems.
Q How is the primary current range determined for these power meters?
The primary current range (designated as X) is determined by the ratio of the external current transformer (CT) connected to the meter. For example, a CT with a ratio of 100 A/5 A allows the meter to measure up to 100 A of primary current. This flexible design allows the meters to be adapted to a wide variety of load requirements.
Q What is the difference between a 3P3W and a 3P4W power meter?
A Three-Phase Three-Wire (3P3W) meter is used in balanced three-phase systems without a neutral conductor, commonly found in industrial machinery and utility transmission. A Three-Phase Four-Wire (3P4W) meter includes support for a neutral conductor and is used in unbalanced three-phase systems, such as those in commercial buildings and data centers.
Q Can these power meters work with high primary current applications such as 1000 A systems?
Yes. By pairing the meter with an appropriately rated external CT (e.g., 1000 A/5 A), the 3P3W and 3P4W meters can accurately measure primary currents up to 1000 A or higher, making them suitable for large-scale industrial and utility-grade monitoring applications.
Q What voltage ratings are supported by the three-phase power meters in this series?
Both the 3P3W and 3P4W power meters support rated voltage inputs of 100 V, 220 V, 380 V, and 440 V, covering a wide range of international industrial and commercial voltage standards. The single-phase model supports 100 V and 220 V.