Top 10 Circuit Breaker Manufacturers

One of the most important elements of any electrical network is the circuit breaker. Ordinary people have to get acquainted with this device during the construction of a private house, cottage, or when upgrading the electrical wiring in an apartment. Once in the store, it is not surprising for a novice electrician to become confused by the assortment presented. How to choose the right machine for your home or apartment?

• First of all, it is important to correctly determine the type of circuit breaker. Two-pole models are placed in front of the meter; with their help, you can completely de-energize the house. For input, devices with a rating of 32 or 40 A are needed. Single-pole circuit breakers are installed on different electrical wiring lines. For lighting, 16-amp devices are selected, and for the socket group it is better to buy devices with a rating of 25 A.
• Machines with the same parameters can differ significantly in price. It’s all about the brand; products from Europe and the USA are the most expensive; Chinese and Russian companies are attracted by their availability.

Our review included the best domestic and foreign manufacturers of circuit breakers. The final distribution of places in the ranking was influenced by the opinions of professional electricians and reviews of Russian consumers.

Appearance

General unification has led to the fact that it is very difficult to discern the difference between a difavtomat and an RCD based on the shape and size of the case. For a single-phase network, the housings of these devices have a size equal to two housings of a single-pole circuit breaker. Each of them has a test button, they are two-pole. Installing an RCD on a DIN rail is no different from installing a difautomatic device.

Externally, differential circuit breakers differ from RCDs:

• according to the inscriptions on the front panel;
• labeling;
• functional diagram.

Usually at the top of the device below the name of the manufacturer is the name of the device. For example, VD and several numbers. VD means differential switch, that is, it is an RCD. If the abbreviation RCBO is present (an abbreviation for the expression: residual current automatic switch), then it is a difavtomat. In case of damage to the inscription on the front panel, the manufacturer prudently embossed the name of the device on the side of the device. True, to determine the type of device you will have to remove it from the DIN rail. But this method applies mainly to domestic manufacturers.

Foreign suppliers do not bother about this. Therefore, you have to navigate by markings and diagrams.

Rated current designation

The difference is observed in the designation of the rated current. In the RCD it is written as a number, for example 16 A, which means that the device will operate normally at currents not exceeding 16 amperes. The main characteristic for it is the value of the shutdown current.

For a difavtomat, in addition to the leakage shutdown current, the time-current characteristic is important. It determines at what overload currents and how quickly the device will turn off

Therefore, before the rated current value there is a letter indicating the limit of exceeding the rated current at which the device will instantly operate. If there is an inscription on the front panel, for example, “C16”, then this means that this is a difavtomat. The electromagnetic release of this automatic device will instantly disconnect the line when the rated current is exceeded by 5-10 times.

Functional diagram

On the RCD diagram on the front panel, you can see an image of the magnetic circuit of the differential transformer, a test resistor, three switches and a control winding. Two switches disconnect the phase and neutral wires in case of leakage currents exceeding the setting. The third key is needed to allow the current limited by the resistor to flow, bypassing the transformer. Thus, an imbalance is created between the currents flowing through the phase and zero.

The diagram of the difavtomat, in addition to the RCD diagram, shows a key connected to the phase wire at the output of the transformer. Or maybe a different image. Instead of an additional key, a square is shown with a figure inside a positive sine wave and a rectangular pulse. A sine wave means an electromagnetic release, and a square wave means a thermal release.

Features of slot machines of some famous brands

1. TDM. Country of origin: China. They are making two episodes. BA 47-29 can be connected with a comb and has side notches for cooling. Short circuit current 4.5 kA. Conveniently, these machines can be sealed using special plugs. True, they are sold separately. Unlike KEAZ and Decraft, which have them included.

The second series 47-63 without comb connection and no notches. Short circuit current 4.5 kA.

The price for these machines is one of the most affordable. On average 130 rubles.

2. Energy (China). There are also two series being released. VA 47-29, the comb is placed on both sides, there are side recesses, a power indicator, the short-circuit current is already 6 kA.

The second series is 47-63. It also has a short-circuit current of 6 kA, but there are no recesses or an indicator.

3. IEK (China). One of the most popular slot machines. Most buyers have heard of them. Therefore, they often ask and give preference to this brand. Episode 47-29. Current 4.5 kA, comb on both sides. There are side recesses.

4. Decraft. Made in China. It is distinguished by the presence of stickers for different groups: kitchen, rooms, bathroom, corridor, children's room, etc.

5. EKF. The main feature is that the Proxima series includes plugs for sealing. They do not need to be inserted into grooves like TDM, KEAZ or IEK. They are made in the form of a hinged lid. Keep in mind that the cheap 47-63 series does not have them.

6. KEAZ. The abbreviation stands for Kursk Electromechanical Plant. Produces two series of household machines. VM63 is made in Kursk. It comes with a comb and sealing, seals are included, there is a contact indication, they are designed for a current of 6 kA.

VA 47-29 is a cheap Chinese version. Does not fit the comb, no indicator, current 4.5 kA, not sealed.

7. GE (Hungary). Space for the comb on one side, starting with single-pole ones. Current 6kA, no side recesses. They look solid and weigh noticeably.

8. Moeller. Produced in Austria and Serbia. Suitable for those who don't like everything Chinese.

9. Eaton. Just a series of slot machines from Moeller. Produced in Europe.

10. Shneider Electric. These machines are green. Several series are being produced.

The first Acty 9 – no recesses, indication or comb. Manufactured in Thailand and Bulgaria. C 25 A Bulgaria, below Thailand.

The Easy 9 series is very popular. It is inexpensive. Single-pole ones cost 150 - 180 rubles.

11. Legrand TX (Poland). Current 6000 A, there are recesses, no comb and indicator. Alternative to Schneider.

12. ABB (Germany). Those who value quality choose ABB or, in our opinion, simply ABB. Cool electricians and electrical panel assemblers love this brand for its reliability and affordability. These machines are still made in Germany. The Germans also produce two series:

S – 6000 A, recesses, indicator, comb on one side. Price about 200-300 rubles.

SH – 4500 A, recesses, no indicator and comb. Price about 150-250 rubles.

Top 4 best Russian manufacturers

IEK

One of the most famous Russian brands, whose products are found in all stores in the country. The organization offers the best equipment at an affordable price. Most of the products are manufactured at domestic enterprises in compliance with international quality standards.

The company is popular not only in Russia, but also in a number of CIS countries. In 2014 and 2016, it won first place in the public trust rating. This event made it possible to make import substitution real and of high quality.

Today, the company catalog contains over ten thousand items. Lately, the organization has begun paving the way into television communications and electric motors. This decision made it possible to significantly increase the income and turnover of enterprises.

In addition, the company is aware of the requirements of the Russian market and what customers expect from it. Knowledge of these two factors allows you to create a unique product that will be durable and trouble-free.

IEK 10mA type AC VD1-63 is one of the popular RCDs for home and garden use. The device is equipped with all the necessary functions that ensure reliable operation. The housing is made of plastic that meets fire safety standards, which will minimize the risk of fire in the event of a short circuit.

Sold at a price of 1,120 rubles.

IEK 10mA type AC VD1-63

Advantages:

• The organization produces only high-quality products;
• Low price;
• Long service life;
• Long warranty;
• High quality build.

Flaws:

• Not found.

EKF

A well-known Russian brand that will impress the buyer with quality and reliability. The company offers customers thousands of different products at affordable prices. If a person wants to secure his home, then the products of this organization will help to do this easily and at a minimal cost.

High-quality materials used in the manufacture of the board and case increase the performance characteristics of the device. The equipment produced by EKF is used not only to equip home lines; in addition, it has found active use in global manufacturing enterprises. This has a positive effect on quality and also increases the confidence of ordinary buyers.

The company has been operating on the Russian market for 18 years and during this period it has gained enough experience, which has shown that high cost does not say anything about the quality of the product. The main thing is to make equipment with a long service life in mind and not forget about safety, then customers will come back again.

In addition, a positive point is that the company often tries to invest in supporting Russian business, including its own. Thanks to this, most companies try to cooperate with EKF.

A popular product of this organization is EKF PROXIMA VD-100 RCD 2P 40A/30MA. The product has good technical performance, reliability and efficiency. The degree of protection is IP20. The case is made of plastic, which does not emit a strong odor when first opened and does not have any backlashes or cracks.

The average price is 890 rubles.

EKF PROXIMA VD-100 RCD 2P 40A/30MA

Advantages:

• Efficiency;
• Reliability;
• High-quality assembly;
• Long service life;
• Warranty – 5 years.

Flaws:

• Not detected.

TDM ELECTRIC

A high-quality Russian brand, which was created by a national electrical company. Today, the brand is associated with the best quality and reliability. Products are supplied to every region of the Russian Federation and are in wide demand. The company produces thousands of different equipment that are used to ensure the comfort and safety of each user.

Products are manufactured in Chinese factories, but this does not in any way affect the quality of the goods. Everything is performed at the best level, which allows you to maintain the set level for a long period. The assortment includes more than 12,000 different products that are suitable for any home or business.

TDM VD1-63 2P 25A 30mA type A is the best residual current device that guarantees a person’s safety and longevity of work. No fire or electrical leakage will affect the performance of equipment or human life. Degree of protection – IP20.

Sold at a price of 920 rubles.

TDM VD1-63 2P 25A 30mA type A

Advantages:

• Products are made from quality materials;
• Durability;
• Low cost;
• Protects well.

Flaws:

• Not detected.

ERA

This brand is familiar to every user. The popularity of this company is widespread throughout the Russian Federation and abroad. In addition, the company has a couple of contracts with the Ministry of Defense, and it also produces some products for automotive equipment. From SIP fittings to small light bulbs, every element is produced under this brand. Thanks to this, ERA often takes first place in competitions and enjoys the trust of buyers.

ERA Pro NO-902-25 VD1-63 30mA is a popular product of the company, which is distinguished by its reliability and build quality. It will easily prevent short circuits and disconnect all devices from the power supply. For a low cost, a person receives not an ordinary product, but a guarantor of safety and durability.

The average price is 550 rubles.

ERA Pro NO-902-25 VD1-63 30mA

Advantages:

• Efficiency;
• Reliability;
• Easy installation;
• Low price.

Flaws:

• Not found.

Purpose of the differential machine

The difavtomat is used to protect the electrical network from overload, short circuit and leaks. In addition to the capabilities of an RCD, it performs the functions of a circuit breaker.

It happens that a person connects an extension cord with five or six additional sockets to one outlet, and connects several powerful devices through them. In such circumstances, overheating of the conductors is inevitable. Or, let’s say, when the electric motor is turned on, the shaft jams, the winding begins to heat up, after some time a breakdown occurs, followed by a short circuit of the wires. To avoid this, a difavtomat is installed. If the current excess is significant, then the difavtomat will turn off the line within a few seconds, without waiting for the insulation to melt, thereby preventing a fire.

The speed of switching off the automatic circuit breaker depends on how many times the flowing current exceeds the rated current for a given line. If the voltage is exceeded multiple times, up to a short circuit, the electromagnetic release is instantly triggered. If the current flowing through the line exceeds the rated current by more than 25%, then after about an hour the device will turn off the line and the thermal release will operate. If the excess is greater, the shutdown will occur much earlier. The response time can be determined from the time-current characteristics given for each device.

How to choose a circuit breaker

First, we’ll mention how to choose a circuit breaker, so that as you review, you can notice the advantages and disadvantages of products from different manufacturers for a specific environment of use. The circuit breaker should be selected based on:

1. Wiring sections.

   In domestic and industrial buildings, the diameter of the cable core can be from 1.5 to 35 mm². For 1.5 mm² you will need a minimum 10 A “automatic machine”. For 35 mm², you should use an 80 A switch. You can find out the wire cross-section by the markings on the braid (if the wire is new) or by clearing part of the protective sheath and measuring its diameter with a caliper.

2. Number of cores

   . If there are several cores in the cable, then the ratings of the circuit breaker remain the same as with a single-core wire, but the design of the “breaker” will be different, providing for the possibility of connecting several contacts.

3. Cable laying locations

   . With the same cable cross-section, the operating rating of the circuit breaker may differ due to different operating environments. For example, for a 1.5 mm² wire laid in the wall, 10 A is enough. But if the wiring is laid in a plastic box, then a 16 A “breaker” is already required. In the case of a loose cable sagging in the open air or buried in the ground, a 20 A circuit breaker is required A.

4. Chain type

   . Requirements for “automatic machines” may differ depending on the single-phase or three-phase network. For example, for a 4 mm² wire operating with 220 V, you will need a 25 A circuit breaker. But if the same cable transmits 380 V, then it is permissible to reduce the breaker threshold to 20 A.

To make it easier for you to understand the choice of circuit breaker for each specific type of wire, we attach a table.

Selecting an automatic circuit breaker based on the power of the connected equipment is not entirely correct, since if the wiring cross-section does not match the current consumed, the core itself will constantly overheat and the protection will be triggered. This will prevent the devices (drilling machine, welding machine) from working normally. And if the “circuit breaker” matches the current of subsequent equipment in the circuit, but exceeds the wiring indicators, then a fire will occur. Therefore, for powerful consumers, you will first have to replace the wiring, and then select the appropriate “machine” based on its diameter.

But the sensitivity of connected devices to current surges is worth taking into account, for which switches with a low operating threshold are provided (category A and B from 4.5 kA, responding to a 30% short-term deviation from the nominal value). They are suitable for equipment with semiconductors that do not like even short-term overloads. For other devices that use high starting currents (lathes, generators, pumps), it is worth selecting switches with a high sensitivity threshold (from 6 kA), otherwise the voltage will always be knocked out during startup.