Technical characteristics of the circuit breaker BA 47-29

Technical data VA47−29

All models in this line are inexpensive, but do an excellent job with the protective functions provided by the design, and have been in use in residential and industrial buildings for a long time. The table shows the technical characteristics of the VA 47−29 circuit breaker:

There are some differences in the technical characteristics of the VA 47−29 and the similar modified model VA47−29M: the latter machines have a latch on the DIN mounting rail in a double fixed state. The switch handle is wider and has a larger area, and the body with increased heat dissipation helps to increase the current limit by 10%.

Rated current table S201 C

Marking of machines

Circuit breaker marking

Each machine has its own marking, which consists of alphanumeric and conventional graphic images used to identify and convey to the consumer its main technical characteristics. They are necessary for the correct selection and further operation of the machine.

• manufacturer's name or trademark;
• designation of type, catalog number or series number;
• rated voltage value;
• rated current values ​​without the symbol “A” with the preceding designation of the type of protective characteristic (A, B, C, D, K, Z) and current limiting class;
• rated frequency value;
• the value of the rated maximum breaking capacity in amperes;
• connection diagram if the correct connection method is not obvious;
• the value of the control ambient temperature, if it differs from 30 °C;
• degree of protection, unless it differs from IP20;
• for type D circuit breakers, the maximum value of the instantaneous tripping current, if it is higher than 20In;
• value of rated impulse withstand voltage Uimp.

The marking of difavtomats is similar to the AB marking, but contains additional information:

• rated residual current;
• settings of the disconnecting differential current (for DV with several values ​​of the disconnecting differential current);
• rated maximum differential making and breaking capacity;
• a button with the symbol “T” for operational monitoring of the performance of the DV by differential current;
• symbol “~” – for DV type AC;
• symbol for DV type A.

Explanation of circuit breaker symbols

Along with the marking of the switches, the necessary information about the characteristics and type of the AV contains its symbol, which is required to place an order for the purchase of the AV.

The symbol of the circuit breaker is as follows: VA47-Х1-Х2Х3Х4ХХ5-УХЛ3

Explanations for the symbol AB are given in the table.

Examples of writing AB notation:

• single-pole circuit breaker with a protective characteristic of type “C” for a rated current of 16 A: Switch VA47-29-1S16-UHL3
• four-pole circuit breaker with a protective characteristic of type “C” with an unprotected pole for a rated current of 100 A: Switch VA47-100-4NC100-UHL3.

For products of the UHL3 design, the operating temperature range is from minus 60 to +40 °C.

Features of switches BA 47 29

• The design of setting the thermal release settings by screwing the adjusting screw into the metal base allows you to avoid changing the settings during operation.
• The main contacts of the machine are coated with silver-containing material, identical in composition to similar products manufactured by ABB, Schnider Electric, Legrand.
• The original design of the BA 4729 contacts reduces losses between the conductor and the switch terminals.
• The moving contacts inside the switch are silver plated for increased service life and durability.
• The high-speed contact release system of the VA 4729 machine does not allow the current to reach peak values ​​during a short circuit.
• Possibility of connecting conductors with a diameter of up to 20 mm.
• Electrical durability over 6000 on/off cycles
• Mechanical 2000 shut-off cycles
• Possibility of arbitrary placement in space.

Explanation of designations of the BA 4729 IEK series

Automatic VA 47-29 VA 4729 series of circuit breakers number of poles 1,2,3,4XX overload current setting XX short circuit response characteristic B 3-5 are designed to protect active loads and long lighting lines with TN and IT grounding systems (sockets , lighting).C 5-10 are designed to protect circuits with active and inductive loads with low pulse current (compressor, fan) D 10-20 is used for loads with high pulse (starting) currents and increased switching current (low-voltage transformers, lamps - arresters, lifting mechanisms, pumps)

Questions and answers about the BA 4729 IEK series

What do the letters B, C, D mean in the designation of modular machines?

Short circuit response characteristics. Selected according to the type of load that the machine will protect

B 3-5 are designed to protect active loads and long lighting lines with TN and IT grounding systems (for kettles, water heaters, etc.).

C 5-10 are designed to protect circuits with active and inductive loads with low pulse current (used in 90% of cases when installed in apartments and residential premises.)

Usually, machines with characteristic C are installed in apartments.

D 10-20 is used for loads with high pulse (starting) currents and increased switching current (low-voltage transformers, arresters, lifting mechanisms, pumps) K 8-15 active-inductive load, electric motors, transformers Z 2-3 electronics

Below are the time-current characteristics of machines with characteristic B (curve 1) and with characteristic C of curve 2

How to choose machines to build a selective circuit in an apartment?

If you want to build a selective circuit for overload current, then in this case it will be enough to simply build a circuit with an increase in the ratings of higher-level circuit breakers. That is, for example, we install a 16A circuit breaker on the outlet line, and a 25A input circuit breaker.

Constructing a short circuit selective circuit is much more difficult. Here you need to use selectivity tables from manufacturers’ catalogs.

Although some designers, in their projects, try to build a selective circuit of automata according to the response characteristics (indicate lower-level automata with characteristic B, and higher ones with characteristic C or D). Which is probably not the best decision

Advantages of BA 47-29 switches

Among the advantages of modular circuit breakers are:

• Non-separable design with four (Russia) or six (China) rivets that connect all parts of the body.
• Availability of contact position indicator. Lights up green when they are open, or lights up red when the system is energized when the contacts are engaged.
• Availability of combined protection against exposure to overcurrents on electrical networks. The thermal release responds in a timely manner to the occurrence of any overloads in the network, while the electromagnetic release is triggered if it detects the occurrence of a short circuit in the network.
• The standard module width is 18 mm and corresponds to the width of one pole. For example, if you buy a three-pole machine BA47-29, its width will be 54 mm.
• Spring-loaded locking mechanism allows the device to be easily mounted on a DIN rail.
• A seal used to secure the screws of the contact terminals.
• Ribbed surfaces of the clamps, which ensures effective fixation of the connected cores.
• The switching capacity is 4.5 kA (the maximum short circuit current switched by this equipment), which is quite sufficient for domestic use.

The BA 47-29 machine is an inexpensive and practical option for ensuring the safety of electrical networks in any modern home.

Features of application

DIN rail is a foreign invention that takes its name from the German standard designated DIN 43880-1988.
In our country, their use is regulated by GOST R IEC 60715-2003. These products are sometimes called mounting rail. The full name looks like this: “mounting rail for fixing protective devices in low-voltage distribution and control equipment for electrical networks.” In accordance with this definition, its scope extends to the following cases:

• the need to install electric meters and other types of measuring equipment in the distribution cabinet;
• the need to place protective equipment there (RCDs, automatic circuit breakers, voltage relays, etc.);
• If desired, install special connecting fittings into the cabinet.

Types of DIN rails
The decisive factor determining the capacity of such a rail is the width of the machine module or similar protective equipment installed on its base.

When assessing the width of the machines, they are based on the specific number of protective devices used in the panel, which can have a single-pole or multi-pole design. The second option concerns three-phase networks. In general, its use is limited to this particular set of functions, but in certain situations other directions for using the DIN rail are possible.

Dimensions and installation method

In domestic conditions, standard strips with a profile width of 35 mm (TN 35), having a shelf height of about 7.5 mm, are traditionally used. Different versions of the product may differ in the declared thickness of the profile (1-1.5 mm) and the diameter of the holes filled during perforation (4 or 5 mm). To attach them to the distribution board guides, you will need bolts of the appropriate size.

The installation product is fixed at the two extreme points of the strip in such a way that there are no parts protruding beyond the cut of the guides. That is, the length of the workpiece is selected exactly to size, for which the side excesses are cut off in advance.

In hard-to-reach places with difficult working conditions with modular equipment, it is possible to install holders for DIN rails of a special design. Such guides allow you to rotate them to a convenient angle if desired.

Versions VA47-29

Article Name Price

A8224-MVA20-1-001-B

order 10 days

Automatic switch VA47-29, 1 pole, 1A, characteristic B

Automatic switch VA47-29, 1 pole, 1A, characteristic B

189.60

A8224-MVA20-1-001-C

= 23 pcs.

Automatic switch VA47-29, 1 pole, 1A, characteristic C

Automatic switch VA47-29, 1 pole, 1A, characteristic C

180.72

A8224-MVA20-1-001-D

order 10 days

Automatic switch VA47-29, 1 pole, 1A, characteristic D

Automatic switch VA47-29, 1 pole, 1A, characteristic D

208.56

A8224-MVA20-1-002-B

order 10 days

Automatic switch VA47-29, 1 pole, 2A, characteristic B

Automatic switch VA47-29, 1 pole, 2A, characteristic B

189.60

A8224-MVA20-1-002-C

= 29 pcs.

Automatic switch VA47-29, 1 pole, 2A, characteristic C

Automatic switch VA47-29, 1 pole, 2A, characteristic C

180.72

A8224-MVA20-1-002-D

order 10 days

Automatic switch VA47-29, 1 pole, 2A, characteristic D

Automatic switch VA47-29, 1 pole, 2A, characteristic D

208.56

A8224-MVA20-1-003-B

order 10 days

Automatic switch VA47-29, 1 pole, 3A, characteristic B

Automatic switch VA47-29, 1 pole, 3A, characteristic B

189.60

A8224-MVA20-1-003-C

= 4 pcs.

Automatic switch VA47-29, 1 pole, 3A, characteristic C

Automatic switch VA47-29, 1 pole, 3A, characteristic C

180.72

A8224-MVA20-1-003-D

order 10 days

Automatic switch VA47-29, 1 pole, 3A, characteristic D

Automatic switch VA47-29, 1 pole, 3A, characteristic D

208.56

A8224-MVA20-1-004-B

order 10 days

Automatic switch VA47-29, 1 pole, 4A, characteristic B

Automatic switch VA47-29, 1 pole, 4A, characteristic B

189.60

A8224-MVA20-1-004-C

= 1 piece

Automatic switch VA47-29, 1 pole, 4A, characteristic C

Automatic switch VA47-29, 1 pole, 4A, characteristic C

180.72

A8224-MVA20-1-004-D

order 10 days

Automatic switch VA47-29, 1 pole, 4A, characteristic D

Automatic switch VA47-29, 1 pole, 4A, characteristic D

208.56

A8224-MVA20-1-005-B

order 10 days

Automatic switch VA47-29, 1 pole, 5A, characteristic B

Automatic switch VA47-29, 1 pole, 5A, characteristic B

189.60

A8224-MVA20-1-005-C

= 13 pcs.

Automatic switch VA47-29, 1 pole, 5A, characteristic C

Automatic switch VA47-29, 1 pole, 5A, characteristic C

180.72

A8224-MVA20-1-005-D

order 10 days

Automatic switch VA47-29, 1 pole, 5A, characteristic D

Automatic switch VA47-29, 1 pole, 5A, characteristic D

208.56

A8224-MVA20-1-006-B

order 10 days

Automatic switch VA47-29, 1 pole, 6A, characteristic B

Automatic switch VA47-29, 1 pole, 6A, characteristic B

151.44

A8224-MVA20-1-006-C

= 26 pcs.

Automatic switch VA47-29, 1 pole, 6A, characteristic C

Automatic switch VA47-29, 1 pole, 6A, characteristic C

138.36

A8224-MVA20-1-006-D

order 10 days

Automatic switch VA47-29, 1 pole, 6A, characteristic D

Automatic switch VA47-29, 1 pole, 6A, characteristic D

186.60

A8224-MVA20-1-008-B

order 10 days

Automatic switch VA47-29, 1 pole, 8A, characteristic B

Automatic switch VA47-29, 1 pole, 8A, characteristic B

189.60

A8224-MVA20-1-008-C

= 11 pcs.

Automatic switch VA47-29, 1 pole, 8A, characteristic C

Automatic switch VA47-29, 1 pole, 8A, characteristic C

180.72

• 1

Cable Requirements

You can already understand that not every cable is suitable for connecting such equipment. This is logical, since under heavy overloads it will simply burn out and can cause equipment failure or a fire. Therefore, when choosing a cable for an electric stove, you should rely on the following important characteristics:

• Rated voltage;
• material that serves as the basis for wire cores;
• cable section;
• ease of connection to the device.

If we take the rated voltage for devices of well-known brands, then its value must be exactly no less than that provided by the conventional electrical network where the device needs to be connected. Now let's say a little more about the described indicators.

Probably one of the most important aspects that will play a role is the material used to make the cable cores. It's best if they are copper. This metal itself can be soldered if necessary. And the copper power wire is more flexible than its aluminum counterpart. But the cost of a copper solution will be higher. If the choice falls on an aluminum analogue, then you need to understand that its installation should not be carried out in materials that burn. You can find out what the electrical wire is made of thanks to special markings on the product itself.

If we talk directly about numbers, then, as a rule, most solutions from well-known brands (Samsung or Electrolux) are designed for electricity consumption of just under 4 kW. For this reason, the safety margin of the wire needs to be selected based on power somewhere with a focus on this indicator.

To ensure that the device operates as safely as possible, you should also pay attention to the following points:

• If you need to lay the cord directly from the panel to the electric stove, a cord with a standard cross-section of 1.5 square meters is sufficient. mm.
• If other electrical appliances will be connected between the device and the panel, then you should have a cable with a cross-section of at least 2.5 square meters. mm. This option will provide the necessary reserve in case of connecting some other household appliances.

Another important parameter is the phase connection. It will depend on the number of cores in the cable. The wire can be 3 or 5 wires. The number of cores will depend on the power supply network in the room. And it can be either 1-phase or 3-phase. If the first option, then you will need to purchase a wire with three cores, and if the second - with five.

You should also find out whether the purchased equipment supports the type of connection that was selected. For example, stoves with a power of up to 5 kW are usually connected to a 1-phase network, while more powerful ones have a 2 or 3-phase connection. The type of cable that can be used will also be important, but more on that below.

Features of the design of the circuit breaker

• VA 47-29 has an improved design of the arc extinguishing system, which ensures the best characteristics of the circuit breaker when turning it on and off. Installing such a system prevents contacts from burning, and this ensures a longer service life. It also allows for increased protection against short circuit currents. The design of the circuit breaker corresponds to patent No. RU 139886.
• The design of the device provides the possibility of combining the FORK bus and connecting wires at the same time. For this purpose, additional upper clamps are provided. You can also install a PIN bus in them, which is used when building complex power distribution networks. A more reliable and vibration-resistant connection is provided due to the improved design of the clamping bar and serrated socket. The latest innovation contributes not only to the pressing effect, but also to jamming the wire in the socket, ensuring its reliable contact.
• In addition to the improved contact connection design, the circuit breaker is equipped with non-stick protection. This is ensured by installing an additional spacer with a metal heat sink. The device is coated with a special coating, which helps extinguish the arc, eliminating melting of the housing.
• All contact groups are coated with a silver-containing alloy by soldering, which helps to extend the service life of the contact group, eliminating burning and sticking. In addition, the coating helps reduce contact resistance, which increases the efficiency of the device.
• Increased contact area of ​​contacts, which provides more efficient heat dissipation and reduces the likelihood of overheating of the structure in the event of an increase in load current.
• The body has increased strength due to the monolithic front wall and the presence of additional rivets. The thickness of the plastic has also been slightly increased and some kind of stiffening ribs have been applied in the form of longitudinal protrusions.
• VA47-29 is equipped with a contact position indicator. Accordingly, when they are closed it is green, when open it is red. And for quick installation and dismantling, a spring-loaded mechanism with a lever for pulling the locking device is provided.

Description of single-pole switches ABB S201P C

Modular single-pole switches ABB S201 P C are designed to protect electrical circuits from overloads and short circuits in cable lines, electric motors, lighting systems, as well as socket lines. They have two different trip mechanisms: a delayed thermal trip mechanism for overload protection and an electromechanical trip mechanism for short circuit protection.

Circuit breaker device

The housing material of the S201 P C is made from the most advanced materials, consisting of the latest generation of thermoplastics, which do not contain halogen pollutants and are recyclable.

All circuit breakers are equipped with contact position indication (CPI). You can easily determine whether the circuit breaker is in the on position, which makes maintenance work easier and safer.

Technical characteristics of the circuit breaker

VA 47-29, being a safety device for emergency load disconnection from power circuits, is calculated primarily for the maximum operating current or tripping current. This is the value at which the security system is triggered. For this brand of switch, I trip will be 255% of the nominal. In this case, the shutdown time will take 1 s.

In addition to the rated current, when exceeded, automatic shutdown occurs, there is such a parameter as the number of on-off cycles. But this indicator is set separately for electrical and mechanical wear resistance. In the first case, it is capable of operating stably for 6000 cycles.

The machine is designed to operate with alternating voltage up to 400 V and constant voltage up to 48 V at the same shutdown current value. As for the number of contact groups, the machine can be single, paired, triple or with 4 contact pairs. Accordingly, it can be used in three-phase and single-phase power circuits.

The design of the switch has low protection from external factors, in particular, dust and moisture - IP 20. Therefore, it must be mounted in closed electrical distribution cabinets.

How to choose slats for installation in a closet

Since the width of the 1 DIN machine is the determining factor when choosing the right size of DIN rails, you need to familiarize yourself with the range of metal products. The most common samples are represented by steel slats with standard sizes: thickness 1 mm and length up to a meter. They are distinguished by their versatility, and are significantly cheaper in price than their aluminum counterparts.

Immediately before use, they are cut into blanks of the required size to fit the housing dimensions of ready-made switchboards. In this case, each specific rail is adjusted in length to the required standard size. When assembling a new shield, its dimensions are selected based on the finished slats plus a small margin.

The size of the DIN rail machine is critical when designing distribution equipment of various classes. Only taking into account this indicator can one correctly calculate its operational parameters and the permissible load on the load-bearing elements of the structure.

Marking and operating conditions

Some of the characteristics of the BA47−29 are contained in the designation of the switch model. The following signs are used that make up the marking after the abbreviation BA:

• 47 — product serial number;
• XXX - digital modification code;
• X - letter indicator of the protective characteristic: overload capacity B, C, D;
• XX - rated current of the machine, ampere;
• X is the number of poles (1, 2, 3, 4).

The main advantages of the switch are: silver on the contacts, notches on the clamps - they prevent overheating and melting of the wires at the points of their connection.

The device is capable of operating at an altitude of up to 2 thousand meters above sea level in an atmosphere from -40 to 50ºС for at least 15 years, it can be placed in any position.

Description

According to its characteristics, VA 47-29 is a high-speed release that will provide instant shutdown of circuits in which an unauthorized overcurrent has occurred. The device can be used for purposes with different types of loads, disconnecting them from power with the same quality and efficiency.

The shutdown speed depends on the type of load, which is expressed by the letter A, B, C:

• For loads such as lighting, soldering iron equipment and other electrical appliances with low current consumption are switched through switches with index B.
• To control motors with low current consumption, category C automatic machines are used.
• Loads with high currents are controlled using switches with index D.

The acceptable characteristics of VA 47-29 made it possible to use them in the domestic sphere for switching general-purpose loads: lighting, ventilation systems, various household appliances. The price of the device depends on the index. VA 47-29 with a steeper characteristic have a higher price. The cheapest components are those with the letter D.

Handymen will be interested in an article about the characteristics and connection diagram of the KU202N thyristor.

Ease of installation

• Possibility of sealing to protect against unauthorized access (plug supplied separately).
• The universal head of the reinforced terminal clamp screw allows you to use any screwdriver and provide the necessary tightening force.
• Detailed installation and operating instructions make it easy to install the machine even for a novice installer. The din-rail latch with fixation simplifies installation and dismantling of the device.
• The device implements the possibility of double simultaneous connection of a bus and a conductor, which allows you to significantly expand the range of possible circuit solutions.
• The terminals of the device are marked and signed (Network/Load), which allows you to avoid installation errors.
• BA47-29 switches can be installed in any position without changing their nominal characteristics. The supply line can be supplied both through the upper and lower terminals, without disrupting operation.
• Detailed installation and operating instructions make it easy to install the machine even for a novice installer.

S201P C installation specifications, dimensions, compatibility

Application and design of switches

BA series machines are used not only in housing construction, but also in factories, power plants, mines and other industrial facilities. Main elements and blocks of the protective device:

• housing with markings and an indicator of switching directions;
• control handle;
• contacts made of an alloy including silver;
• knurled clamps for securing external wires;
• electromagnetic release coil and its bimetallic plate;
• chamber for extinguishing the electric arc;
• mounting base with a lock for the rail.

Operating principle: due to an overload in the network, a part made of double metal bends and acts on the free release lever - the protection is triggered. When a short circuit occurs, the multiplying current in the coil shifts the core and the circuit opens. In both cases, an electric arc occurs on the contacts - it is for this that an arc-extinguishing chamber is provided in the design of the machine.

Obviously, if the washing machine, heater and iron are turned on at the same time, an overload will occur and the protection will work, disconnecting the entire apartment circuit with appliances from the power supply. To distribute power, the wiring in the premises is divided into two or three groups, with each of them connected to its own circuit breaker with a certain current rating.

Installation and connection diagram

It is easy to establish experimentally that when overloaded, the machine will open the circuit regardless of where the input/output conductor is connected. But according to the rules of electrical installations (PUE), the input must be connected to a fixed contact AB.

It is not difficult to find this contact on the diagram printed on the device. Here is fixed contact No. 1.

This rule is determined by the internal structure of the machine, namely, the location of the arc extinguishing chamber. When the network is turned off, the spark “slides” towards the moving contact, is distributed over the comb and fades out. If you connect it the other way around, then each time it is disconnected, the spark will affect the working contact, destroying it.

For installation of most AVs used in everyday life, DIN rails are provided. Fastening is carried out with spring-loaded latches.

When tightening the screw clamp, use a screwdriver with suitable slots. This will help to apply enough force to securely fasten the wire.

The wire connected to the AB must be single-core. Stranded conductors are pre-serviced.

Single-pole AVs are sold at any building materials and electrical store. By following simple rules when choosing, you can reliably protect your home from fire if the electrical wiring malfunctions.

Motor protection

If the system uses a circuit breaker belonging to protective class C, when the installation is started, when the currents reach ten rated values ​​or even exceed this figure, false operation of the equipment may occur. To eliminate such a risk, in the vast majority of cases, modular devices belonging to protective class D are used.

It is important to ensure that the system is reliably protected from overload currents, which ultimately have a very negative impact on the life of the insulation used. The switch should be located as close as possible to the electric motor, and a thermal relay is best installed on the starter in order to achieve equal temperature operating conditions for this equipment

It often happens that the thermal release operates in vain, being influenced by any heat sources, or does not work at all if it is in low temperature conditions.

Advantages

has been selling a wide range of different types of circuit breakers for more than 10 years, and during this time has accumulated vast experience and established contacts when choosing a supplier of these products.
At the same time, our specialists regularly study and analyze the quality of circuit breakers, their exact compliance with classes and characteristics. By purchasing switches S201 P C in, you can be sure that you have purchased truly reliable, high-quality products that meet all GOST requirements. If necessary, you can always obtain a quality certificate and test report for the batch of circuit breakers you are interested in. Return to list