Two-tariff electricity meter: advantages and benefits of using
From this article, you can learn the features of such a device as a two-tariff electricity meter: the main types of structures, their advantages and disadvantages, purchase prices. The text describes the procedure for installing the device and the associated formalities, the rules for handling the meter, its verification and taking readings. The article examines in detail devices with a different number of phases and recommendations for calculating energy consumption.
Two-tariff electricity meter: features of the devices
With the increase in electricity tariffs in 2017, many owners of apartments and private houses are trying to reduce the cost of paying utility bills. There are several ways to solve this problem. Some resort to the installation of energy-saving equipment of the modern generation. Others prefer to buy a two-tariff electricity meter, the price of which, although higher than the prices of standard devices, however, allows you to achieve savings during subsequent operation.
Pay attention! In terms of external characteristics, a two-tariff type meter is practically indistinguishable from a conventional electronic device. The difference lies only in its readings, which display data for night and day time separately. Since the dimensions of the device are standard, the installation of a two-tariff electricity meter can be performed in the same place where a conventional device previously stood.
According to the updated electricity tariffs, from January 1, 2017, the population of the Moscow region in the first half of the year will pay for 1 kW of electricity at a price of 4.81 rubles. In the second half of the year (from July 1), the cost of a unit of energy will increase to 5.04 rubles.
Two-tariff electricity meters: since when does the night time switch to daytime
At night, you may notice that working incandescent lamps in the house shine brighter than in the evening. This trend is especially typical for houses in rural areas located far from the transformer substation. In some cases, the differences can be so great that obtaining high-quality electricity is possible only through a voltage stabilizer.
In combined energy systems, which are typical for apartment buildings, it is enough to buy a two-tariff electricity meter to solve this problem, which is what most of the population does. The use of such devices assumes that 1 kW of electricity, depending on the time of day, will have a different cost.
In the daytime, the cost of 1 kW, wound up with a two-tariff device, is slightly higher than when using a conventional meter. This period lasts from 7:00 to 23:00. Further, a preferential tariff comes into force, which allows you to significantly save energy costs. Moreover, the cost of 1 kW is several times less. This period lasts from 23:00 to 7:00.
Pay attention! Power plants encourage consumers of electric energy to use household appliances with high power at night. As a result, apartment owners receive savings, and power plants evenly distribute the loads on the equipment, avoiding overloads during the peak period.
How two-tariff electricity meters work
The principle of operation of separate or differential billing is very simple. To understand how multi-tariff type devices work, you can imagine several standard counters combined in one device. Each of these units calculates electricity exclusively within its time interval, at the end of which the next device comes into operation. In this case, the readings for each device are taken separately, calculated taking into account the billing, and the results are summed up.
Of course, it is impossible to organize the timely launch of several accounting devices using a mechanical counter. For this reason, multi-tariff devices, including two-tariff designs, have only an electronic control option. These units are equipped with a scoreboard where all the information is placed.
Multi-tariff counters have a built-in clock for convenient switching of the device between different billing zones, as well as memory that allows you to save this data. Most often, each zone is marked with the letter “T” with a certain numeric index. Marking “T” without a numeric index displays the total amount of electricity consumed in kilowatts. This value would display a standard counter if it was set.
Useful advice! The total figure is not needed to calculate the differential billing, but it can be used to estimate the benefit by calculating the result according to the usual system.
Advantages and disadvantages of installing two-tariff type meters
Why is it profitable to buy a two-tariff type electric meter:
Most often, electricity consumers rarely ask questions about ecology and rationalization of electricity supplies, so the main advantage of two-tariff devices can be called their efficiency.
The operation of multi-tariff devices has its drawbacks:
Two-tariff electricity meters: customer reviews
Having identified the advantages and disadvantages of two-tariff designs, you can proceed to reviewing reviews from forums. Below are some of them:
“Naturally, there are considerable savings if you use electricity like my grandmother. After 23:00, she turns on the water heater, washing machine, sometimes irons. There is always hot water in the morning, and in the evening it all starts again. Of course, I’m not so fanatical, but I also try to stick to this system in order to save money. At least when I don’t forget.”
Svetlana Strochkina, Yekaterinburg
“The whole district has installed two-tariff meters. There is no other way to keep utility bills within reasonable limits. That’s the whole area and we wash it at night. It turns out no one is offended.”
Georgy Makoveenko, Moscow
Pay attention! It is not always advisable to install a two-tariff device. In some cases, such devices can become a source of inconvenience and additional costs.
There are also negative reviews on the forms:
“The total cost of installing an electric meter in my case was 1400 rubles. Literally a month and a half later, my entire house switched to this type of accounting equipment. I’ll tell you a dubious pleasure. With a difference in payment of only 0.13 rubles. for 1 kW per month, I have 12 rubles. savings. Considering how much electricity meters cost, it turns out that I will be able to return the money spent only after 10 years. This is despite the fact that not every month it is possible to achieve savings. Totally disappointed.”
Evgeny Dorokhov, St. Petersburg
“My neighbor used one. With the promised savings, in fact, the bills run up big if you, like a robot, do not control your every step and do not plan the washing, then ironing. You can’t entice me with such a “pleasure”.”
Igor Skorkin, Moscow
Two-tariff electricity meters: prices and types of designs
Accounting devices with differential billing externally look the same as single-tariff types of devices. The main differences are in the following parameters:
- number of phases (there are three-phase two-tariff electricity meters and single-phase ones);
- maximum power level (current);
- accuracy class;
- number of zones;
- type of fixation (mounting on a DIN rail or by bolting);
- presence of interfaces for communication (electricity meters with remote reading);
- type of digital display;
- additional functionality.
Pay attention! In modern versions of multi-tariff counters, in addition to the day-night mode, additional settings are provided that allow you to keep records for several time zones per day and even several days per week. Thanks to this, users have the opportunity to save electricity on favorable days, but on condition that the electricity supplier provides a similar tariff. Information about this should be specified in the contract.
Recommendations for choosing a two-tariff electric meter
When choosing a device for your home, you should pay attention to the capabilities that the meter has. In addition to the basic data, accounting devices can measure:
- instantaneous power consumption;
In some modifications, there are built-in memory drives that allow you to save data on past periods, RCD and protection against power surges in the network.
When buying a device with differential billing, it is important to clarify whether the selected model is approved by the state register. The options and parameters of the devices must correspond to the current pricing. To make sure of this, it is better to seek advice from a local energy supply company.
It is forbidden to buy accounting devices from random sellers or companies with a dubious reputation. The company must have a permit to sell such equipment and relevant documentation.
Features of single-phase two-tariff meters
Two-tariff single-phase meters are designed for domestic use. The population is gradually switching from outdated equipment to newer two-tariff equipment with electronics. Buyers prefer domestic models.
The list of domestic manufacturers includes the following enterprises:
- Moscow Plant of electrical measuring devices;
- Energomera Concern;
- Nizhny Novgorod Plant named after M.V. Frunze;
- NPF Mossar;
- Saransk Instrument – making plant, etc .
Pay attention! The model range of Mercury devices supports all the standards required for accounting equipment.
A single- phase device at the output gives 220-230 V. Because of this, there are restrictions in the consumption of electricity – 7-10 kW. These devices are connected to a single-phase two-wire network. It is possible to connect to a two-phase network, however, in such cases, each phase must have its own device.
Prices of single-phase two-tariff electricity meters
The prices for single-phase accounting devices with two tariffs from different manufacturers are almost the same. The final cost of the device depends on the store that sells the equipment. The difference varies between 10-40%. Using the example of the table below, you can compare the prices for single-tariff and multi-tariff Mercury equipment designed for one phase.
Average prices for Mercury single-phase equipment:
|Device model||Price, rub.|
The table shows how big the difference is between the price of single-tariff and multi-tariff devices designed for one phase. Therefore, when buying a device, you need to make sure that its use will be profitable, taking into account the current tariff of the electricity supplier, otherwise the cost of purchasing accounting equipment will not pay off.
Electricity meter readings: how to remove data from accounting devices
Single-tariff and multi-tariff devices for electric energy metering. The order and basic rules for the transfer of testimony.
Connection diagram of a single-phase device
Today, two-tariff equipment is present in almost all new buildings. Therefore, most of the tenants, when settling into a new house, can immediately use all the advantageous advantages of the differential accounting system.
As for other consumers, they can turn to Gosenergonadzor when it is necessary to change the electric meter, the service life of the electric meter does not matter. If earlier the device was subject to replacement once every 16 years, today, if you want to replace the accounting equipment, it is enough to write an application to the power supply company. Specialists perform a similar procedure within one day.
Pay attention! Some energy supply companies offer consumers a comprehensive service. When switching to a differential billing system, the organization will undertake the purchase of the device, its installation and configuration. This procedure can be performed independently.
Before proceeding with the self-installation of single-phase equipment, you should carefully study the operating instructions and the wiring diagram of the device. This information can be placed in the instructions attached to the meter, or located on the reverse side of the terminal cover.
The terminal block has 4 contacts:
- phase input;
- phase output;
- entering zero from an external network;
- zero output.
In order for the procedure to be completely safe, it is necessary to turn off the automatic machine, plugs or switch. If the input cord is supplied to the meter, the line should be disconnected. When connecting wires, you need to follow the sequence of contacts specified earlier.
Features of three-phase two-tariff meters
Three-phase two-tariff electric meters Mercury 230, as well as similar devices of the previously mentioned manufacturers, are used mainly in enterprises where three-phase electricity is used. In addition to the function of differential electricity counting at night and during the day, these devices perform accounting for each phase separately.
In some universal models, it is possible to collect data on both active and reactive energy. There are modifications that allow you to set a limit on consumption. After the specified amount of electricity expires, the device automatically turns off the mains power.
Pay attention! It is better to entrust the installation of the meter to the hands of professionals. The specialists of the power supply company are thoroughly acquainted with the design features of the devices, which allows you to make the correct connection and avoid fines. In this case, all the requirements of the PUE are guaranteed to be supported.
The installation process of the device is as follows:
- dismantling the old device;
- installation of a three-phase multi-tariff device;
- testing the device’s software for operability and setting it up for the appropriate tariff plan;
- checking the connection;
- installation of the seal.
Varieties of three-phase multi-tariff counters
There are several varieties of three-phase multi -tariff meters on sale:
Pay attention! Installation of any of the listed counters is accompanied by difficulties affecting the connection procedure. A universal algorithm is used to install single-phase devices, and the connection schemes of three-phase electric meters can be different.
Installation diagram of direct-on devices
Direct-on counters are installed very easily. The scheme of their installation is in many ways similar to the algorithm for connecting single-phase devices. All the necessary information is indicated in the technical data sheet that is attached to the device. At the same time, it is very important to observe the order of connection of each of the wires that differ in color. In addition, you need to monitor the placement of even and odd numbers. The procedure for connecting wires according to the scheme is described in the table.
|Wire number||Phase||Wire color||Connection type|
Indirect and semi-indirect switching devices: installation diagram
Semi-connected accounting devices are connected by means of current transformers. There are many installation schemes for this equipment.
The most popular schemes:
Important! Indirect switching devices are not intended for installation in residential premises. They are used in industrial enterprises where electricians with a high level of qualification are engaged in the installation of equipment.
Three-phase two-tariff electric meters: prices
Using the example of Mercury equipment, the table below shows for comparison how much single-tariff and multi-tariff electric meters with a three-phase connection type cost.
Average prices for Mercury equipment:
|Device model||Price, rub.|
|230 AR-01 CL||4880|
|230 ART-01 CN||4474|
|230 ART-00 CN||4474|
|234 ART-01 P||5578|
|234 ART-01 PO||6345|
|234 ARTM-01 POB.R||8856|
|234 ARTM-02 PB.R||8162|
|234 ART-01 OL1||7633|
|236 ART-01 PQL||5445|
The table shows that three-phase meters with a differential metering system are much more expensive than single-tariff ones. But not all residential premises can benefit from the installation of multi-tariff equipment, just as it is not always justified to buy budget structures with one tariff.
Multi-tariff or single-tariff counter: which is better to put the device
The main difference between a three-phase device is that its installation is carried out in a four- or three-pass AC network. The standard voltage for such a system is 380 V.
Three-phase and single-phase accounting devices are used in different fields:
Pay attention! Three-phase equipment can be installed in a single-phase network.
If there is a choice between buying a single-phase device and purchasing a three-phase meter, it is better to give preference to the first one. Devices designed for three phases have a high power level and high voltage. For this reason, they need more distribution current, and their operation is dangerous if a short circuit occurs in the system.
How much does it cost to change the electricity meter
Many owners of urban apartments are switching to two-tariff equipment, which allows them to save money. Using the services of specialists who have the appropriate license, it is possible not only to install the device efficiently and safely, but also to reprogram the old meter to the two-tariff accounting mode, if it provides such a function.
Average service rates:
|Name of the service||Price, rub.|
|Replacement of a single-phase single-tariff device (installation and disassembly)||2000|
|Replacement of a single-phase multi-tariff device (installation and disassembly)||2000|
|Installation or replacement of current transformers (limited to 1000 V)||3200|
|Replacement of a three-phase direct-on device (installation and disassembly)||3500|
|Replacement of a three-phase indirect switching device (installation and disassembly)||3500|
|Programming of tariffs||1000|
|Programming the device when switching to daylight saving time or winter time||1000|
|Mercury 200.02 (multi-tariff single-phase device)||1800|
|Mercury 230 ART-01 CN (multi-tariff direct-on device)||4700|
How to take readings from a two-tariff electricity meter
Meters with two tariffs display electricity data as accurately as possible. The information is displayed on the display. Moreover, it reflects not only the total amount of energy consumed, but also the amount of electricity used during a certain period of time, for example, day or night. With this in mind, the apartment owner can create his own schedule for using powerful appliances to minimize the amount of utility bills.
Pay attention! Accounting devices with a differential billing system inform the homeowner not only about the readings. They display the degree of load on the system, so that the process of energy consumption can be rationalized.
Some users will find the process of taking readings from a multi-tariff meter difficult due to the presence of many numeric values on the display. However, the data processing system is actually very simple, if you look into it.
How to take readings from two-tariff electric meters
To take readings from the electric meter, you will need a pen and a blank sheet of paper. The letter “T” with the digital marking 1, 2 or 3 is displayed on the accounting device. The device has an “Input” button for taking readings at different rates.
The scheme of taking readings:
Important! When taking readings to calculate the cost, you do not need to rewrite the numbers coming after the decimal point. They will complicate calculations and may cause an error that will entail an overpayment.
How to fill out a receipt for electricity payment correctly
Not every energy supply company monitors the documentation process, so very often consumers are forced to fill out receipts on their own.
Receipt filling scheme:
Most often, the list of necessary information is limited to the specified data. The receipt form must be approved by the energy supply company. In some cases, it is necessary to record the model of the accounting device. In the communication offices where the payment of utility bills for electricity is carried out, consumers can get advice on the correct filling of receipts.
In addition, there is a hotline where you can call to resolve such issues. Many companies have resources on the Internet, where users are provided with consulting support.
Useful advice! In some cases, it is allowed to transmit information on the electricity meter via the Internet. However, such a system works only with monthly data transmission to the energy supply company.
Transmission of readings by an electric meter: the main methods
To date, several convenient data transmission systems have been developed for electric meters to the service company:
According to the updated legislation, owners of apartments in multi-storey residential buildings, as well as housing in private sectors are not required to transmit data. All information from the accounting devices can be forwarded in a convenient way for each consumer at the end of the month. If the owner of the meter has recently become a user of the services and does not have receipts confirming payment, it is allowed to transmit readings in an unauthorized way. In this case, e-mail, an answering machine and SMS messages can be used. If the method of transmission via SMS messages is used, the personal account number will be required.
With this in mind, it can be concluded that two-tariff meters in most cases bring benefits. At the same time, the system of taking readings is no more complicated than that of old-generation devices.