METER SO-I446 » Service life » Calibration interval

MADE IN USSR

This is what the shield (passport) of the SO-I446 10-34 Ampere meter looks like. The rated and maximum currents of the meter are indicated at the bottom of the panel in the center ( 10-34A

). There is clearly no comma, which means that when taking readings, you need to write off all five digits.

Meter SO-I446 5-17 Ampere

And this is the shield (passport) of the SO-I446 5-17 Ampere meter. The rated and maximum currents of the meter are indicated at the bottom of the panel in the center ( 5-17A

). The comma is visible to the naked eye, which means you need to write off four digits.

In the 80s in the Soviet Union, the Vilnius Electrical Equipment Plant - VZET

SO-I446 electricity meters were mass-produced. Not everyone knows that two modifications of SO-I446 electricity meters were produced at the same time. Due to the similar design of the shields (passports) of both modifications, sometimes confusion occurs in taking readings from SO-I446 meters. How electricity consumption is taken into account, with or without a comma, is indicated in paragraph 2.2 of the meter’s passport.

MINISTRY OF INSTRUMENT ENGINEERING FOR AUTOMATION AND CONTROL SYSTEMS VILNIUS ELECTRICAL EQUIPMENT PLANT

SPECIFICATIONS

2.1 Meter type SO-I446 complies with GOST 6570-75 and TU 25-04-2054-76.

2.2 Energy consumption is taken into account in kilowatt hours using 5 digits of the counting mechanism.

If the last digit on the right of the meter is not separated by a comma, then its reading is in whole kilowatt-hours (for 220V, 10-34A);

and if there is a comma before the last digit, then it gives tenths of a kilowatt-hour and is not taken into account when writing off (for 220V, 5-17A).

2.3. The revolution counter on the counting mechanism is used to check the electricity meter at the factory.

. The value of the revolution counter scale division is not a multiple of the number of revolutions of the disk.

2.4. The rated current of the meter is 5 or 10A, the rated voltage is 127 or 220V, (the specific scale is indicated on the panel), the rated frequency is 50Hz.

Good day, dear readers! Today a rather old electric meter came to our table - SO-I446. This electricity meter began to be produced in 1988, although this was many years ago and you can’t find anything like it on sale anymore, it still works great in many houses, cottages and apartments.

The SO-I446 meter is an induction single-phase single-tariff meter that records electricity on an accrual basis. This meter was installed mainly in the household, household segment. The body is made of thick plastic, although it is fragile. On the front panel there is a drum counting mechanism in the form of two blocks: one counts kilowatts and the other in the form of a clock counts fractions of kilowatts/hour. An induction rotating ring is also located under the scoreboard.

With i446m calibration interval

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Regardless of how many characters, 5 digits are rewritten.

when taking readings, if there are 6 digits and the last one is separated by a comma or highlighted in a different color, then we rewrite the 5 digits from left to right, we do not take the rightmost one, it shows fractions of kilowatts.
If the meter has only 5 digits and there is a clock-shaped display at the top right, then we rewrite all 5 digits, the dial on top shows fractions of kilowatts as the 6th digit in the first type of meter.

Specifications

The ambient temperature in which the meter should be operated must be in the range from +1 to +40 degrees, i.e. the meter is designed for use indoors in which the temperature in winter is not lower than +1 degree.
Rated voltage 127 or 220 Volts
Rated current 5 or 10 A
Frequency 50 Hz

Accuracy class

The accuracy class of the Soviet meter SO-I446 corresponds to class 2.5 on the instrument accuracy scale. Modern meters are more accurate, they correspond to accuracy class 1 or 0.5. When used at home with low electricity consumption, there will not be a big difference in the calculations. Since the accuracy class exceeds 2, most likely the management company will require you to replace it, otherwise the calculation will be carried out according to the standard.

Electricity meter passport

The TsE6807P electric meter is available in several modifications that differ in the type of housing and some technical characteristics.
This may be a model whose full name contains the designation Ш4 or Ш6 - such meters are mounted in a panel; if P5 is indicated, then this type of design is for mounting on a DIN rail. In order to determine the characteristics of your particular meter by its full name, you can decipher and understand the whole essence, to do this, view the image below. The meter is made in accordance with generally accepted quality standards for measuring instruments GOST R 52322-2005 and GOST R 52320-2005. Regardless of the version of the meter housing, the technical characteristics are the same for all, so we will consider below the general characteristics for all types of the TsE6807P meter.

The type of counting mechanism is different for different modifications - it can be a mechanical rotating drum display, or an electronic counting device can be installed that displays readings on an LCD display.

The meter is provided with protection against mechanical and magnetic influences for manipulating the device's count. You won't be able to stop it with a regular magnet or unwind it. Manufacturers every year strive to best protect the electric meter from theft of electricity.

You most likely won’t be able to buy a TsE6807P meter since this model has already been discontinued and is being replaced by newer and more improved models. An analogue of TsE6807P is CE-101, the average price of which ranges from 600 to 1000 rubles, depending on the modification.

Sealing the electricity meter: who should do it and why

Thanks to the installation of the seal, the meter will be a mechanically intact device. This also confirms its serviceability. The seal serves as protection against illegal withdrawal of electricity from the supplier. It must be installed on every working device. In order for this work to be done correctly, you need to know the rules for sealing electricity meters.

If sealing of the electricity meter is required, the instructions will allow you to do everything correctly. First you need to purchase a new device. It is advisable to trust the installation work to professionals who know how to seal the meter correctly. Usually the procedure is performed by specialists from the utility service, but some owners do it themselves.

Main views

Electricity meters have been in use for quite some time. Today there is already a variety of their types, among the main ones we can highlight:

Induction.
Electrolytic.
Electronic.

The electronic type refers to modern meters, and is predefined with a liquid crystal display. Nowadays, multi-tariff energy metering devices are becoming widespread.

Accounting for consumed resources is measured in kilowatt hours. When installing the meter, do not forget about the maximum possible voltage of 127 or 220 watts and a current of 5, 10, 20, 40 or 60 amperes. According to all quality standards (GOST), the maximum error in the operation of electricity meters cannot exceed 7.5 minutes.

Generally accepted meter compliance According to the basic requirements, meters must:
Comply with the accepted register, have certain certification and be approved for use in Russia.
After installation, immediately be registered. This can be done by an Energosbyt specialist who will seal the meter, register it and allow it to be put into operation.
Be at a level no higher than 170 centimeters from ground level.

Electricity meter passport SO-I446

The rated current of the meter is 5.10A. And the rated voltage is 220V or 127 at a frequency of 5Hz. 340% is the maximum current of the meter (calculated from the rated current), and 1% is the sensitivity threshold.

At the rated frequency and rated voltage in the circuit, the power consumption is no more than 2.0 W.

The weight of the counter is only 1200 g. And its size is 217:135:111.

The electric meter is installed only in a dry, well-ventilated room, in which the temperature range varies from 0 to +40 degrees Celsius, and humidity should not exceed 80%. In addition, there should be no gases or aggressive vapors in the air.

Specifications

The temperature range of the working environment is from 0 to +40 degrees, which means the meter must be placed somewhere in a warm room so that low or high temperatures do not disturb the device’s counting.
The rated voltage of the meter is 220 volts, and the maximum is 380;
The rated and maximum current, depending on the type, may be the following 10(40); 20(50);30(75); 50(100).
To prevent the counter from stopping and twisting, there is a locking ring on it, which will prevent the induction rotating drum from moving backward. Although using a powerful magnet can still stop the rotation.

Additional characteristics can be found in the meter’s operating instructions; below is a clipping with the main technical characteristics. You can also find out the connection diagram for the meter from the instructions.

Accuracy class

The accuracy class of the SA4-I678 electricity meter is 2, which is measurable with average counting accuracy, since modern meters have values of 0.5 or 1.

How to take readings from an electronic meter

Modern electronic meters are much more convenient than induction meters, and therefore it is easier to take readings from them. Information in such devices is displayed on a special display.

It is important to take into account the fact that these devices can show not only the energy spent, but also some other information, most often this:

Electricity consumption both for the entire operating time of the device and for a certain period of time.
Load power that is connected to the electronic meter.
Present day, month, year and time.

One of the most convenient features of meters of this type is their ability to take into account energy consumption not only for the entire period of operation of the device, but also for individual tariff zones, that is, to take into account energy consumption by time intervals of the day.

This is convenient because at night the cost of electrical energy is less than during the day, so an electronic multi-tariff meter for metering electricity costs allows you to save a lot of money.

Verification and verification interval of the electric meter

Each electrical energy meter needs to be verified after a certain period of time.
This article will tell you about the frequency of checking electric meters and all related procedures.

Verification of electrical energy metering devices

Checking the electricity meter - determining the error of its measurements. Verification must be carried out several times during the entire service life of the metering device.

There are three types of verifications:

primary – carried out one-time by the manufacturer (or when importing the electric meter into the country where it is intended to be sold and operated); during this verification, the performance of the metering device and compliance of the measurement accuracy with the declared class are determined; the date of this check is always indicated in the technical data sheet of the device;
periodic - carried out by the metrological service or another licensed body after the expiration of the verification interval, regardless of whether the meter was working or stored in packaging, in order to assess the level of wear of the device and the ability to provide readings with an acceptable error;
extraordinary - carried out before the time of periodic verification due to lack of confidence in the sufficient accuracy of the readings, loss or loss of a technical passport with data on previous verifications, etc.

The essence of the verification is to compare the readings of the meter installed in the apartment with the readings of the reference meter and calculate the error in the readings of the first of them. If the error determined by this method does not exceed the permissible accuracy class, the electrical energy meter is considered suitable for use. If the value of a certain error exceeds the permissible limit, you will need to replace the electricity meter in the apartment.

Checking the induction electric meter

Upon completion of the check, a seal is placed on the body of the metering device indicating the quarter and year of verification to determine the date of the next one. Also, a note about the verification date is placed in the technical passport of the electric meter, or the owner is issued a verification certificate.

Let us repeat, since this procedure is carried out exclusively by the metrological service or specialists accredited by it, you can only verify the electricity meter at home by contacting the specified organizations. It is not possible to operate meters that have not been verified on time, since the readings from such metering devices will not be taken into account when issuing utility bills.