Three Phase Energy Meter

Your Professional Three Phase Energy Meter Supplier

Zhejiang Kaou Instrument Co., Ltd. is a modern manufacturing enterprise specializing in the research, development, production, and sales of smart meters, traditional mechanical meters, and power metering equipment. With an annual production capacity of one million units, the company exports its products worldwide and is recognized as one of the major exporters in China’s meter industry.

Advanced Production and Calibration

We operate three smart meter production lines and multiple high-precision calibration stations, ensuring stable large-batch output. Our annual capacity of 1 million single-phase meters and 500,000 three-phase meters supports reliable and timely supply for global projects.

Strict Quality Control and Global Certifications

Every order is backed by a full inspection process—raw material checks, hourly in-line sampling, and 12 final tests including aging and temperature shock tests. We comply with IEC, STS, CE, RoHS, ISO9001, and ISO14001 standards to guarantee consistent, safe, and compliant products.

Strong Customization Capabilities

We offer flexible customization based on local grid needs, including voltage options (110V/220V), communication protocols (RS485/LoRa), and design requirements. This ensures each meter fits the technical specifications and installation conditions of the target market.

Reliable Service and On-Time Delivery

Our team provides full pre-sales, order-tracking, logistics, and after-sales support, including multilingual documents, customs clearance assistance, and technical guidance. Standard orders ship within 30 days, helping customers reduce supply risks and maintain stable project timelines.

Parameter

Accuracy	Class 1 for active energy, Class 2 for reactive energy (optional)
Rated Voltage	3×230V
Rated Current	5 - 100A
Pulse constant	1000 imp/kWh
Frequency	50Hz
Insulation grade	Class II

Types of Three Phase Energy Meter

The three phase energy meters produced by our company mainly include the following types:

3 Phase Prepaid Electricity Meters

The 3 phase prepaid electricity meter is a high-performance smart metering device designed in strict accordance with IEC standards.

3 Phase Din Rail Meter Of 4P

The 3 phase din rail meter of 4P can direclly and accurately measure the positive active energy in the energy metering, and the 7-digit LCD display shows Active power consumption, with good reliability, small size, light weight, beautiful appearance, advanced technology, 35mm DIN standard rail type installation and other characteristics.

3 Phase Din Rail Meter Of 7P

The DDS8825 guide rail series 3 phase din rail meter of 7P adopts the latest microelectronic technology and is used to measure the three - phase AC active energy with a rated frequency of 50/60Hz, and the forward and reverse power consumption are measured equally.

Advantages of Three Phase Energy Meter

Accurate Load Handling

Efficiently manages large machines and multiple appliances—ideal for commercial and industrial spaces.

Real-Time Monitoring

Provides accurate consumption data and 3-phase motor amp calculations for improved decision-making.

Improved Uptime

Load distribution across phases means that even if one line fails, others stay functional, ensuring continuity.

Smart Monitoring

Modern 3-phase energy meters offer remote tracking, consumption alerts, and tamper detection for better management.

Applications of Three Phase Energy Meter

Industrial Equipment

For monitoring the energy consumption of machines and heavy-duty equipment that runs on three-phase electricity and thus, enables efficient consumption and minimization of energy loss.

Commercial Facilities

Applicable in the amount of energy used in the energy-efficient office blocks, malls, and warehouses.

Power Distribution Systems

Used at substations and grid systems to enable tracking of the energy usage across various utilities and allow even energy distribution.

Renewable Energy Systems

Used in setups of wind turbines and solar farms where energy efficiency and phase monitoring of the system are very crucial.

Safety Precautions Before Installing Three Phase Energy Meter

Verification

Starting off with completely isolating the specific appliances with a voltage tester and cutting off their supply till the point of ‘No residual current’.

Wearing Protection

Following the verification step, make sure to wear insulated gloves, safety goggles, and shoes that can’t conduct electricity as an added measure.

Meter Inspection

Thoroughly inspecting every component physically to detect mismatches or worn-out pieces which can include the meter as well. If damaged parts are found, replacing them should be considered a priority to tackle any hitches during the installation.

Bus Bars

Check that the installation region does not contain minimum moisture that can contaminate the bars along the extremes of temperature.

Wiring Process of a Three Phase Energy Meter

Disconnect from the power source

The first thing is to turn off the power source. It is good practice to check with a voltage tester, whether power is there or not so as to avoid any shock or damage to any part.

Meter parameter details

Each meter may have its parameters, for example, the voltage rating in the range of 120V or 277V with respect to each unit for a 3-phase meter, hence parameters are to be checked with respect to the load and distribution board.

Connect the incoming phase wires

Now from the supply side first identify the incoming phase wires L1, L2, and L3, then attach them with the relevant terminals provided in the meter, while doing so ensure that these attachments are flawless and follow the meter wiring diagram

Connecting the neutral wire

First find the neutral wire which is mostly white or light blue, once you locate it connect it to the neutral terminal in the meter, also make sure that the connection has been well tightened and insulated.

Ground wire connection

Connect the ground wire which is green or has no covering copper to the grounding terminal in the meter, to ensure the reliability of this connection check compliance with NEC to fulfill safety standards.

Outgoing Phase Connections

Ensure that the wires L1, L2, and L3 coming out of the meter are properly connected to the corresponding distribution panel sockets. For balancing the overall load, it is prudent to check the starting phase sequence prior to making the connection.

Double-Check Connections

All wire connections are checked in order, there is no wire loose or copper sheathing exposed. Examinations to ensure cable sizes meet the specifications are necessary.

Power On and Test

Bring back the power supply and the meter can be tested using a multimeter. Voltage and current on all three phases should be within the scope of stable figures.

Ordering Process

Please tell us the model with quantity and other requirement which you needed.

We issue the Proforma Invoice to you after confirmed the price and other details.

We arrange the order production upon receipt of confirmed PI and your deposit.

After the goods is ready, we will inform you the shipment date and other informations by email at the same time.

Packaging and Shipping

Packaging	Protective foam + cardboard box
Shipping	Shipping by sea, by air, by express are acceptable. According to your requirements.

Our Factory

Zhejiang Kaou Instrument Co., Ltd., established in 1994 and occupying 1,600 square meters.

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FAQ

Q: How does a 3-phase energy meter work?

A: The 3-phase meter continuously monitors voltage and current on each phase and multiplies these values to calculate power consumption. This data is then integrated over time to provide accurate kilowatt-hour (kWh) readings for generating the electricity bill.

Q: What Tools And Materials Do I Need To Install A 3-Phase Energy Meter?

A: To install a 3-phase energy meter, you’ll need the following: the energy meter itself, screwdrivers, wire strippers, electrical tape, voltage tester, and appropriate wiring (typically rated for up to 600V). You may also need current transformers (CTs) for high-current applications. Always ensure you have the correct meter for your specific voltage requirements, such as 208V or higher, depending on your power distribution system.

Q: How Do I Begin The Installation Process For A 3-Phase Energy Meter?

A: To install a 3-phase energy meter, start by turning off the main power supply. Next, mount the meter in a suitable location, usually near the main electrical panel. Then, identify the incoming three-phase supply wires and the neutral wire. Follow the meter connection diagram provided with your specific kWh meter to ensure proper wiring. Remember, this is complex electrical work, and if you’re not qualified, it’s best to hire a professional electrician.

Q: How Do I Ensure The 3-Phase Energy Meter Is Accurately Measuring KWh?

A: To ensure accurate kWh reading, verify that all connections are tight and correct according to the meter connection diagram. After installation, turn on the power and check if the meter display is functioning. Many modern meters have a test LED that blinks in proportion to the energy consumption. You can also compare the meter’s readings with expected consumption or use a separate power meter to verify accuracy. Regular monitoring of energy consumption patterns can help identify any inconsistencies.

Q: Can I Install A 3-Phase Energy Meter As A Sub-Meter, And What Are The Benefits?

A: Yes, you can install a 3-phase energy meter as a sub-meter. This is often done to monitor the energy consumption of specific areas or equipment within a larger facility. The benefits include more detailed energy monitoring, the ability to allocate costs to different departments or processes, and identifying areas for energy efficiency improvements. When installing a sub-meter, ensure it’s properly integrated into your overall energy monitoring system for comprehensive data collection and analysis.

We're well-known as one of the leading three phase energy meter manufacturers and suppliers in China. Please rest assured to buy high quality three phase energy meter made in China here from our factory. For more cheap products, contact us now.

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