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KINO ELECTRICS CO. LTD：Your Professional Kwh Meter Manufacturer !
 

KINO was established in 2005 and is a professional manufacturer of low voltage electrical device. We are specialized in manufacturing the mini circuit breakers, molded case circuit breakers, ac contactors, over load relays, photovoltaic series breakers and other related electrical baskets of products. Our mission is to be a professional manufacturer for worldwide customers with high quality and best service.

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Our company can produce mini circuit breakers, isolating switches, leakage circuit breakers, single-phase leakage circuit breakers, three-phase leakage circuit breakers, lightning arresters, molded case circuit breakers, distribution boxes, etc.

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We have 1600M² of work space and 5 production lines, as well as various assembly, calibration, packaging and other equipment.

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Our mini circuit breaker is an overcurrent protection device used in residential, commercial and industrial electrical systems; and the isolating switch is an important switching device in the power system. The isolating switch can be used in conjunction with other control equipment to realize the control of the power system.

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We have many years of industry experience and a complete production management, quality supervision, sales service operation system. Whether you want to buy a mini circuit breaker or a molded case circuit breaker, just send your requirements via email and we can customize the product for you.

What is Kwh Meter？

 

 

Kwh meters are one of the most commonly used types of energy meters. They are compact electronic monitoring devices that record the consumed energy flowing through the circuit and provide an accounting of the total energy used. The figures are expressed in kilowatt-hours and represent the sum of the power that has been used over a specified period.

 

Types of Kwh Meter

Kwh meter is an electrical instrument that measures the amount of electrical energy used by the consumers. The main types of kwh meters are listed and explained below.

 

Single-Phase Kwh Meter

Single-phase kwh meters are used for home appliances. They are connected directly between the load and line. Single-phase kwh meters have two electromagnets: one is a series magnet, and the other is a shunt magnet. An aluminum disk is present between these two magnets that rotates in a magnetic field. The rotating speed of this disk is directly proportional to the appliance part.

 

Three-Phase Kwh Meter

Another type of kwh meters is the three phase kwh meter that is used for industrial and commercial applications. The energy consumption in these places is quite high. Therefore, a current transformer is used here to step down the current and protect kwh meters from high currents. These kwh meters consist of one neutral wire and three phase wires.

 

Smart Kwh Meter

A smart kwh meter is an electronic device that records consumption of electric energy and communicates the information to the electricity supplier for monitoring and billing. Smart kwh meters typically record energy hourly or more frequently, and report at least daily. Smart kwh meters enable two-way communication between the meter and the central system. Communications from the meter to the network may be wireless, or via fixed wired connections.

Benefits of Kwh Meter

 

The kwh meter, also known as an electricity meter, is a crucial device used to measure the amount of electrical energy consumed by a household, business, or industrial facility. It is an essential tool for utility companies to accurately bill customers for their electricity usage. Here are some key benefits of kwh meters.

 

Measuring Electricity Consumption
The primary function of the kwh meter is to measure the amount of electrical energy consumed over a specific period of time. This is achieved by monitoring the flow of electricity into a building and recording the total energy usage in kilowatt-hours. Kilowatt-hours are the standard unit of measurement for electrical energy and are used to determine the amount of electricity consumed and subsequently billed to the customer.

 

Promoting Energy Conservation and Efficiency
The kwh meter plays a vital role in promoting energy conservation and efficiency. By accurately measuring electricity usage, consumers are able to better understand their energy consumption patterns and make informed decisions about ways to reduce their energy usage. Additionally, the data collected by kwh meters can be used by utility companies to identify areas of high energy consumption and develop targeted energy efficiency programs to help customers reduce their electricity bills and lower their environmental impact.

 

Ensuring Fair and Accurate Billing
Moreover, kwh meters are essential for ensuring fair and accurate billing for electricity usage. By accurately measuring energy consumption, utility companies are able to bill customers based on their actual usage rather than relying on estimations or flat-rate billing. This helps promote transparency and fairness in the billing process, as customers are charged for the exact amount of electricity they consume. Additionally, the data collected by kwh meters can be used to identify potential instances of electricity tamper or tampering. This ensures that all customers are paying their fair share for the electricity they use.

 

Working Principle of Kwh Meter

 

Kwh meter's working principle follows Faraday's law of electromagnetic induction. This law states that a magnetic field gets generated around a conductor when current flows through it. Electrical energy consumption is measured in these meters using this principle. Its working involves three steps.

Current Measurement
The first step in kwh meter working involves measuring the current flowing through it. For this, the meter has a wire that connects its current coil with the power source. Now, whenever the current flows through this coil, a magnetic field is generated around it.

 

Voltage Measurement
A kwh meter also measures voltage to calculate the electrical energy consumption. To measure voltage, the voltage is directed to the voltage coil of the meter from the power source. This voltage coil creates a magnetic field with a magnitude proportional to the voltage.

 

Electric Energy Calculation
This is the core function of a kwh meter and is done by establishing an interaction between the magnetic fields created around current and voltage coils. Such an interaction leads to the production of a torque that spins the rotating component of the meter, which is usually a metal disk. The spinning speed of this rotating component is proportional to the product of voltage and current, resulting in the calculation of electrical energy consumption.

 

 
 
Components of Kwh Meter

Kwh meters are the basic part to measure the power consumption. To understand the structure of kwh meter, we must understand the four essential components of the meter.

Smart Kwh Meter

Driving System
The components of this system are two silicon steel laminated electromagnets. The upper electromagnet is called shunt magnet and it carries a voltage coil consisting of many turns of thin wire. The lower electromagnet is called series magnet and it carries the two current coils consisting of a few turns of thick wire. Current coils are connected in series with the circuit and load current passes through it. Where as voltage coil is connected to the supply mains and produce a high ratio of inductance to resistance. There is copper bands in the lower part of shunt magnet which provides frictional compensation so that the phase angle between shunt magnet flux and the supply voltage is exactly 90o.

 

Moving System
There is a thin aluminum disk placed in the gap between the two electromagnets and mounted on a vertical shaft. The eddy currents are induced in the aluminum disk when it cuts the flux produced by both the magnets. As a result of interference of eddy currents and two magnetic fields constitute a deflecting torque in the disk. As you start consuming power the disk slowly starts rotating and the several rotation of the disk displays the power consumption, in the particular interval of time. Normally it is measured in kilowatt-hours.

Braking System
The main part of this system is a permanent magnet called brake magnet. It is located near the disk so that eddy currents are induced in it due to movement of rotating disk through the magnetic field. This eddy current reacts with the flux and exerts a braking torque which opposes the motion of the disk. The speed of the disk can be controlled by changing flux.

 

Registering System
As its name suggest, it registers the number of rotation of the disk which is proportional to the energy consumed directly in kilowatt-hour. There is a disk spindle which is driven by a gear on the disk shaft and indicates the number of times the disk has turned.

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Applications of Kwh Meter

 

 

Kwh metering projects range from landlords, homeowners, and small businesses up to large corporations and organizations. The kwh meter figures are prominently in the following applications.

Tenant Submetering
Using kwh meters allows landlords or property managers to perform energy audits of their individual tenant’s power usage. Through submetering, each tenant is obliged to pay in proportion to their consumption. Knowing their energy use level can help renters reduce their overall usage. This translates into savings in overhead costs for the property owners.

Energy Efficiency
Energy efficiency is based on understanding where energy is consumed and using the knowledge to make the necessary adjustments in power usage. In this regard, kwh meters are instrumental in auditing a home or building’s energy efficiency.

 

Factors to Consider When Choosing a Kwh Meter

 

 

Kwh meters can be used to show electricity consumption, help with load management, transformer monitoring, and power monitoring. kwh meters give you access to real-time power consumption and can save you time and money since changes can be made to reduce energy usage automatically when it's not needed. Here are some important factors we need to consider when choosing an kwh meter.

Single-Phase or Three-Phase
When choosing a kwh meter, the first thing you need to consider is how many phases are needed for the system. Most suppliers provide single-phase and three-phase kwh meters. Single-phase electric power is the distribution of alternating current electric power which is where the electric charge periodically reverses direction. If the system you are logging data from is using single-phase alternating current, then you need a single-phase kwh meter. Three phase electric power is a method of alternating current used in electric power transmission, distribution and generation and has three or more conductors that carry alternating current that periodically reverse direction. The voltages are offset by one-third of the period. If the system you wish to log energy data from is a three-phase electric system, then you can only use a three-phase kwh meter to work with it.

 

Number of Amps
After determining the phase of the kwh meter, another thing you need to consider is how many amps you need for the system. Usually, the most common options that meters have for amps are 60 amps, 100 amps, and 200 amps. The number of amps supported can vary as the power systems vary.

 

Accuracy and Precision
One of the primary factors to consider when choosing a kwh meter is its accuracy and precision in measuring electricity consumption. Ensure that the meter adheres to relevant industry standards and certifications to guarantee reliable and consistent readings. Accurate data is essential for effective energy management and billing purposes.

 

Communication Protocols
Kwh meters rely on communication protocols to transmit data between the meter and the utility provider. It is important to choose a kwh meter that supports commonly used communication protocols such as Zigbee, Wi-Fi, or cellular networks. Compatibility with existing infrastructure and the utility's preferred communication network is crucial for seamless integration and efficient data transfer.

 

Data Management and Analytics
The ability to collect, store, and analyze data is a vital aspect of kwh meters. Consider whether the meter provides robust data management capabilities, including real-time monitoring, historical data retrieval, and advanced analytics. These features enable businesses and consumers to gain insights into their energy consumption patterns, identify areas for improvement, and make informed decisions to optimize energy usage.

 

Load Monitoring and Management
In industrial and commercial settings, managing loads efficiently is critical for avoiding power outages and optimizing energy usage. Look for a kwh meter that offers load monitoring and management features, allowing you to track individual equipment or circuits, identify energy-intensive devices, and implement load balancing strategies to reduce peak demand and associated costs.

 

Maintenance Tips for Kwh Meter

Maintaining kwh meters is crucial for ensuring their longevity and optimal performance. By following essential maintenance tips, you can prolong the lifespan of your meter and enjoy continued benefits in energy management and cost savings.

Three Phase Kwh Meter
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Regular Inspection and Cleaning
Just like any other device, kwh meters require regular inspection and cleaning to ensure optimal performance. Periodically check the meter for any signs of physical damage or wear and tear. Additionally, clean the meter and its surroundings to prevent dust buildup, which can interfere with its functionality.

 

Protecting Against Physical Damage
Ensure your kwh meter is adequately protected against physical damage. Install it in a secure location away from potential hazards such as extreme weather conditions, direct sunlight, or heavy machinery. Protecting the meter from physical damage can prolong its lifespan and prevent costly repairs.

 

Battery Replacement

Some kwh meters are equipped with backup batteries to ensure continuous operation during power outages. Check the battery status regularly and replace it as needed to avoid disruptions in service. Refer to the manufacturer’s guidelines for the recommended battery replacement schedule.

 

Professional Maintenance Services
Consider engaging professional maintenance services for your kwh meter if you’re unsure about performing maintenance tasks yourself. Many utility companies offer maintenance plans or services provided by certified technicians to ensure your kwh meter remains in optimal condition.

 

Environmental Considerations
Take into account environmental factors that may affect the performance of your kwh meter. Extreme temperatures, humidity, and exposure to elements can impact the meter’s functionality. Install protective enclosures or covers if necessary to shield the meter from environmental hazards.

 

 
Installation Precautions for Kwh Meter
 

 

The wkh meter belongs to measuring products. There are certain precautions to be taken when installing them. The installation precautions for kwh meters include the following:

 
Installation Location

Kwh meters should be installed in a bright and dry place, and should be easy to read, experiment, and connect. At the same time, the kwh meter should be installed away from strong magnetic fields to avoid interference. In addition, the installation location of the kwh meter should consider convenience for inspection and maintenance.

 
Installation Direction

The kwh meter should be installed in the specified direction, generally vertical installation. This not only ensures accurate measurement of the meter but also avoids damage to it due to tilting or vibration.

 
Secure Installation

The kwh meter should be installed in a secure place to avoid damage caused by external factors. Although the tilt of the installation of the kwh meter does not affect the accuracy of measurement, it is preferable to keep it horizontal during the installation process for better data viewing and aesthetics.

 
Wire Connection

When connecting the power line of the kwh meter, it is necessary to ensure that the power supply line is disconnected, and to connect according to the wiring diagram specified by the kwh meter, ensuring a firm and well-insulated connection. Pay special attention to not connecting the live and neutral wires incorrectly or short-circuiting, as this can cause abnormal operation or damage to kwh meter. The power line connection must be secure to avoid poor contact that can cause abnormal operation or damage to kwh meter.

 
Power Test

The installation and connection of the kwh meter is completed. The terminal knob cover needs to be restored and installed first to protect the exposed power terminal and ensure the safety of personnel during power-on. After power-on, check if the LCD of the meter can display normally, check if the power page shows 0 degrees, turn on the electrical appliances in the home, and check if the pulse indicator of the meter will flash. If the power page shows 0 degrees and the pulse indicator flashes, it means that the kwh meter is functioning properly.

 

 

 

 
Frequently Asked Questions
 
 

Q: How do you read a kwh meter?

A: Read the 5 numbers from left to right, in the order they appear, including any zeros. Ignore any numbers in red, or in a red box. Ignore any number after a decimal point (sometimes shown in red).

Q: How does a kwh meter work?

A: The working principle of a kwh meter is based on Faraday's law of electromagnetic induction, which states that when a current flows through a conductor, it will generate a magnetic field around it. Kwh meters use this principle to measure electrical energy consumption.

Q: What can kwh meter be used for?

A: A kwh meter is an electrical device that measures the electrical power being consumed and this allows the energy consumed over time (by a residential building, a business, or an electrically powered device) to be determined.

Q: Why is the kwh meter important?

A: Kwh meters are an often overlooked but vital part of our daily lives used to measure our energy usage and also play a crucial role in managing our electricity bills and conserving energy.

Q: What are the main parts of a kwh meter?

A: Based on the working design principles of kwh meter, they can generally be divided into eight modules: the power supply module, the display module, the storage module, the sampling module, the measuring module, the communication module, the control module, and the MUC processing module.

Q: How long do kwh meters last?

A: The lifespan of a meter is 10 to 30 years, depending on the meter type. So, as your meter reaches the end of its lifespan, you'll be contacted by your energy supplier to take appropriate action.

Q: How often should a kwh meter be calibrated?

A: Different types of meters have different requirements for testing and accuracy. A self-contained, single-phase meter that is non-magnetic-bearing requires testing every five years, while a magnetic-bearing, surge-proof meter requires testing every 20 years.

Q: Do I need to move my kwh meter?

A: You might consider moving your meter if you're finding it difficult to read or access in its current position. Due to the level of work and cost involved in moving a meter, it wouldn't necessarily be worth moving it on a whim.

Q: How do I reset my kwh meter reading?

A: To do so, press the RESET button on the front panel of the meter. If pressing the RESET button does not automatically set all of the readings back to zero, press and hold the ENTER button while simultaneously pressing the RESET button.

Q: How do you test a kwh meter?

A: You can do this with a Timed Meter Readings test. Take a meter reading sometime between 8am and midday. Wait a few hours and take another meter reading sometime before 11pm. Only one of the two readings should change.

Q: What is functional testing of kwh meter?

A: Functional testing verifies that the kwh meter performs its intended functions according to the specifications and standards. It covers aspects such as meter accuracy, data transmission, display, power supply, and environmental conditions.

Q: How do I know if my kwh meter needs replacing?

A: As your kwh meter gets older it may stop working correctly by running too fast or too slow, leading to inaccurate bills. When your meter reaches its best before date, it has to be removed and swapped for a new one.

Q: How do I know if my kwh meter is working?

A: To determine if your kwh meter is working properly, you can observe the display.Check if the meter is showing numbers that increment regularly as you use electricity. If the numbers are not changing or are frozen, it could indicate a malfunction.

Q: Does a kwh meter work without electricity?

A: In most cases, the Main switch is the red-coloured circuit breaker. The main switch controls the power to your entire house, but it comes after the meter. This means that the meter can still be running while having no power to the house.

Q: Does kwh meter reset every month?

A: Just as a reminder, your kwh meter never resets. If your previous month usage appears to be higher than the reading on your current meter, contact your utility company.

As one of the most professional kwh meter manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy kwh meter in stock here and get quotation from our factory. Also, customized service is available.

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