In today’s article we will review the induction type electrical energy meter – SO-505. This electricity meter has already been discontinued and has been replaced by more modern models.
SO-505 is used in single-phase circuits and records electricity at one tariff (single-tariff) on an accrual basis. Information is displayed on a mechanical readout mechanism. The number of revolutions of the induction disk is proportional to the currently consumed electricity. In this way, you can determine what current electricity consumption is; to do this, you need to take the meter constant (600 revolutions x 1 kW/hour), which shows the ratio of revolutions to electricity consumed.
Life time
The average minimum service life of SO-505 is at least 30 years. After 30 years of operation of the meter, it can continue to be used if it works correctly. Additionally, the manufacturer claims a minimum of 280,000 hours of continuous operation until failure, which is approximately 31 years of operation.
As mentioned earlier, this meter model has been discontinued; at the time of sale, the price of the electric meter varied from 700 to 800 rubles. Now a more modified model SO-52 is being produced and can be purchased.
Electric meter installation
The connection diagram for the CO-505 electric meter is quite simple, but it requires the technician to follow the advice of professionals, as well as all stages of the process. Only in this case can you achieve the desired result and complete the work in the shortest possible period of time.
Recommendations from experts
In order for a self-installed device to work effectively and perform its functions well, it is necessary to take into account the advice of highly qualified specialists. They will help beginners avoid most mistakes and do the job as efficiently as possible.
Useful tips:
- Before starting installation, you should carefully study the device of the meter, the rules of its operation, as well as safety requirements.
- The CO-505 electric meter, like any other induction-type design, does not withstand the effects of cold. Because of this, it is recommended to carry out installation at a temperature of at least 5 degrees above zero (Celsius).
- If the device is installed outdoors, it must be protected from rain, snow and other natural phenomena. To do this, it is best to build a sealed housing and equip it with heating elements.
- When choosing a location for placing the device, you should take into account not only safety requirements, but also the height characteristics of people who are constantly in the room. It is important that taking readings is convenient for each of them. It is recommended to mount the meter at a height of 1 to 1.7 meters.
- All installation tools used must have insulated handles. This will help prevent electric shock and all its negative consequences.
You might be interested in the principle of operation, purpose and scope of application of triggers
Required materials and tools
In order to simplify the process of installing a single-phase meter SO-505, it is necessary to select the right tools and materials. They can be bought in specialized stores in any locality at a relatively low price. This allows even people with little financial means to do the work themselves.
During the installation process you will need the following items:
- shield;
- single-phase meter SO-505;
- wire cutters, pliers, screwdriver (with insulated handles);
- circuit breakers;
- insulators;
- wires;
- fastening elements (nuts, screws and others);
- indicator screwdriver;
- DIN rails.
Step-by-step installation
To ensure that self-installation of an electricity meter does not cause any complaints from the energy sales service, you must comply with all the rules provided by law. You should contact the appropriate organization, write an application and obtain permission to carry out work. After receiving all the necessary documents and familiarizing yourself with the requirements for installing the meter, you can begin work.
Procedure:
- The number of switches is calculated based on the parameters of the equipment and the electrical network.
- The room is disconnected from electricity.
- Using a special indicator screwdriver, the presence of voltage in the network is checked.
- The body of the protective shield opens and the purchased device is installed in it.
- There it is securely fastened using special clamps included in the CO-505 package.
- At the next stage of work, the wires running from the input machine to the electric meter are prepared.
- Three phase cables are inserted into the device and connected to the lower terminals.
- After this, the neutral wires are output.
- The DIN rail is attached to the support insulators with screws.
- Switches are attached to it using a special latch with a spring.
- A grounding and protective bus is attached to the DIN rail. This is done using ordinary screws and nuts. It is important to place the elements in such a way as to eliminate the possibility of them touching and shorting.
- The load is connected to the switches. To do this, the phase is fixed in the lower terminals of the switches, and the zero is fixed in the zero bus. The ground wires are connected to the corresponding busbar.
- The machines are connected to a metering device.
- The CO-505 connection is made by connecting the phase to the upper terminal of the machine. The zero must be secured to the zero bus.
- The shield is installed in a pre-selected location.
- The neutral wire is connected to the third terminal of the electric meter, and the phase is connected to the first.
- All wire attachment points are additionally insulated.
- The installed device is checked for functionality. If any problems are found, they are immediately eliminated.
After completing the installation, you should contact the energy sales service again and write an application for inspection and sealing of the device. At the appointed time, a representative of this organization will come and perform all the necessary actions. After this, the CO-505 electric meter can be used.
How to take readings
In order to record meter readings and make payments, we use the general rules for reading. If there is a comma on the meter display, or the right side of the numbers is separated by a frame or another color, then write down all the numbers that are to the left of the frame or comma, this is the number of whole kilowatts, on the right are tenths of kilowatts.
For a more detailed study of the technical characteristics of the CO-505 electric meter and operating rules, you can use the technical data sheet of the device and the user manual, which are attached below.
Passport of the meter SO-505
Installation and connection
Before installing the electric meter, you need to make sure that the seal is unhindered. In this case, you need to call the energy company and resolve this issue. It is also necessary to find an additional power source, for example for a hammer drill, due to the fact that the power line into which the meter is installed should be disconnected. It is recommended to get a powerful headlamp that will provide good uninterrupted voltage.
How to determine where the phase, zero and ground are. The wire colors will help you.
Counter SO-505
The device is installed using the three-point method using screws - two on top, one on the bottom. In this case, the surface must be vertical. This is because if the meter is not installed correctly, the readings will be inaccurate. If, when installing the device, it becomes skewed, the disk may brake and stop completely.
The meter is connected directly, with current flowing directly through the device. The device is equipped with four terminals for connecting the load and power source. The terminals are arranged in a row from left to right. The first terminal is intended for the phase wire through which current flows from the access distribution board. The second terminal is used to insert the phase wire into the apartment.
Next, automatic switches are installed behind the electric meter, which divide the apartment’s electrical network into groups. Using the third terminal, the neutral conductor is connected at the input from the access panel. The fourth terminal brings zero into the apartment.
It is worth paying special attention to the connection sequence and not to confuse the first and second terminals. Otherwise, the consumer may expect trouble from the inspection company and may be suspected of theft.
The connection diagram and technical parameters are indicated in the instructions that come with the device.
Meter size
The meter is installed using three screws. This model must be mounted vertically on a surface.
There should be no deviations after the entire installation. In case of deviations, the mechanism may not work correctly and show unreliable results.
Distortions create a braking torque in the rotation of the disk, as a result of which it can not only show incorrect values, but also stop completely.
Answers from experts
Gennady Dedik:Evgeny Arestov:
The trick with zero will only work for a three-phase network, I stuck a strip of photographic film between the glass and the body at the dacha and slowed down the disk with it during welding work
Qwebek:
Stopping disk meters absolutely without intervention, without magnets, without grounding, without any devices. The method is suitable mainly for the private sector. 300 UAH or 700 RUR mail [email protected]
50 Hertz:
can be found here v50hz dot ru
Oksana Ochapovskaya: Roman Sergeevich:
What's the problem? so do you have a filling or not? The seal is a loop of fishing line or wire on the head of the bolt. It shouldn't be torn. There are other types of fillings.
Vladimir:
There must be TWO seals in ANY counter! one - on the counting block itself and the second - on the terminal block. in the absence of ANY of them, the meter is considered UNSEALED and the readings from it are invalid!
Andrey Vink:
The bottom cover that covers the terminals? It must be sealed, this is the simplest and most easily accessible place where you can turn off/bypass the meter =)).
electric:
The cover covering the bolts must be sealed.
Victor Noskov:
you made a mistake by installing, changing, or meter yourself. You will have to pay for the mistake.
- https://rusenergetics.ru/oborudovanie/so-505
- https://2155317.ru/kak-ostanovit-so-505/
- https://kuhnileona.ru/so-505-kak-otmotat/
- https://magnit-mska.com/magnity-na-schetchiki/magnit-na-schetchik-elektroenergii/magnit-na-schetchik-so-505
- https://dom-voprosov.ru/prochee/kakoj-magnit-ostanavlivaet-elektroschetchik-magnit-na-schetchik-so-505
Device overview
The CO-505 electric meter is an induction type device. That is, only the electrical energy consumed is measured. The bottom line is that special voltage and current coils are installed in the meter; they create magnetic fluxes. When electricity consumption begins, magnetic fluxes force the disk to rotate, which subsequently counts the electricity consumed.
The entire mechanism was combined into a practical plastic case that is flame retardant.
Please pay attention! This model is equipped with a locking mechanism. That is, if the counter rewinds in the opposite direction, it will stop working. Accordingly, stealing electricity in this way should under no circumstances be carried out.
An electric meter of this type has proven itself to be a fairly reliable and practical device. For example, the declared service life is 32 years. It must be tested 16 years after installation. It also has luxurious characteristics, which we will discuss further.
Please pay attention! This meter also has a minus - a low accuracy class. However, such a disadvantage cannot be considered significant, especially if we consider the benefits to consumers. After all, it will not count the electrical energy consumed. Is this bad, considering the cost of housing and communal services now?
State Certification Center for SI
| GCI | GCI SI Rostest-Moscow |
| Address | 117418, Moscow, Nakhimovsky prospect, 31 |
| Supervisor | Bas Vitaly Nikolaevich |
| contact number | (8*095) 332-67-77 |
| Fax | 124-99-96 |
| Certificate validity period | 01.07.2006 |
| Certificate number | 10369 |
| Certificate type (C/E) | WITH |
| Protocol date | 10 from 06.26.01 p.33 |
All news (4)
- https://pouchetu.ru/elektricheskij/schyotchik-so50
- https://master-kleit.ru/origami/so-50mje-mezhpoverochnyj-interval/
- https://maloplatim.ru/so-50.html
- https://metrolog.biz/opisaniya_tipa_si/21505-01_opisanie_tipa_si.html
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.
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.
