Differential machines in the electrical network of any apartment or country house perform a very important function. Such devices in modern dwellings, according to the technical specifications, must be mounted without fail. In the event of overloads or short circuits, RCDs simply turn off the network. This ensures the safety of the residents of the house.
Many companies produce differential machines today. For example, devices of this type EKF are quite popular with consumers. Reviews of machines of this brand from property owners deserve good, because they are reliable and have a long service life.
Manufacturer
RCDs EKF are produced by the Russian company of the same name. Officially, this company was registered in 2001. Currently, the EKF holding supplies the market with more than 30 product groups. In addition to automatic machines, the company produces, for example, systems for laying cables, low-voltage equipment, and measuring equipment. All products supplied to the market by the EKF holding, including RCDs, according to consumers, are distinguished by reliability and ease of use.operation.
Products of this brand are produced mainly in Russia. However, EKF production sites also exist in China. But in any case, usually devices of this brand, at a not too high cost, can be comparable in quality to devices of this type manufactured by European companies. At the moment, it is EKF in Russia that is the leader in the manufacture of electrical control and protection devices.
Destination
When there is a short circuit in the household power supply, the current strength rises sharply. The result in many cases is the melting of the insulation and its ignition. And this, in turn, of course, is fraught with a fire. In such a situation, the EKF residual current device simply opens the circuit in a fraction of a second. As a result, there is no melting of insulation, fire or electric shock to people. The design of such devices includes elements that control the leakage current.
If several powerful household appliances are plugged into sockets in a residential area at the same time, among other things, the network may be overloaded. This situation is also considered quite dangerous. In this case, a violation of the integrity of the wires or a breakdown of the devices themselves may occur. And it is also fraught with fire and electric shock. RCD EKF and overload will immediately open the circuit.
Since the life of the owners of an apartment or house, as well as the safety of their property, often depends on the quality of the machine, of course, you should choose such equipment carefully. RCD EKF for consumers are consideredinstruments are quite reliable. As some apartment owners note, they often turn off the network even simply, for example, when a light bulb burns out.
Series
At the moment, EKF supplies several models of circuit breakers to the market. For example, EKF machines have earned good reviews from consumers. Let's find out which ones.
- BA47 63.
- Model of the same letter series 47 100.
- Model 47 29.
Automatic machines from this manufacturer are presented in two, three and four-lane versions. All EKF47 devices have a fairly simple design and can be mounted with a network connection, including independently.
Separately, you can also highlight the circuit breakers EKF PROxima VD-100. In this group, the manufacturer also produces several popular models. For example, good reviews from consumers have earned machines of this series P 40A / 30mA, 4P 63A / 100mA 2, etc.
Below in the article, among other things, an overview of EKF machines for the most popular models will be presented.
Consumer Reviews
The main advantage of the RCD EKF, the owners of apartments and houses, in addition to reliability, consider the simplicity of design. Mounting these devices with your own hands, judging by consumer reviews, is not too difficult. At the same time, machines of this brand break down in the future quite rarely. On top of that, they also differ in pretty good maintainability.
The handles in the RCD EKF are provided for fairly wide. BUTtherefore, judging by consumer reviews, it is very convenient to use such devices.
A good opinion about the devices of this manufacturer has developed not only among the owners of apartments and houses, but also among public utilities workers. Judging by the reviews of electricians, EKF machines in household networks can actually serve for a very long time without the need for replacement.
Consumers consider some disadvantage of EKF devices to be that sometimes, unfortunately, marriage occurs in batches of such devices. Such devices during operation can behave completely unpredictably. Judging by consumer reviews, defective RCDs of this brand often do not turn on at all or can turn off the network with or without a reason.
Design Features
EKF circuit breakers are assembled, like almost any other, from the following main elements and assemblies:
- differential transformer measuring leakage current;
- starting body acting during operation on the shutdown mechanism;
- of the network splitting mechanism itself.
The design of the device of this brand is, as already mentioned, not too complicated. Machines from this manufacturer can be connected via a comb bus. According to many experts, despite the relative simplicity, the design of devices from this manufacturer is still more modern than the RCDs of many other domestic brands.
Contacts for EKF models are made of oxygen-free copper with a silver content, which significantly extended the service life of theseappliances. The case of the RCD of this brand is made of plastic that does not support combustion. It certainly also greatly reduces the risk of a house fire.
The EKF manufacturer gives a guarantee for its products in 5 years. At the same time, it is believed that machines of this brand can serve in a household electrical network for at least 20 years.
Model Overview 47-63
Like all other EKF BA machines, the BA47 63 can be used to replace older AF units from the same manufacturer. It has the following advantages, according to experts and consumers:
- advanced housing with the ability to connect various kinds of additional devices without the need for disassembly;
- presence of notches on the terminals, reducing heat loss and increasing the degree of connection reliability;
- presence of surfacing from a composite containing silver, which increases the wear resistance of the contact group and reduces resistance.
Model specifications
Mechanical and contact wear resistance BA 47-63 is 20,000 cycles. It is allowed to connect to this device wires with a cross section from 1 to 25 mm2. The temperature range for this model, as well as for most other EKF brands, is -40 - +50 ° С.
This model can be used to protect networks in residential, administrative and industrial buildings. That is, in fact, it can be considered universal.
Automatic 47-100 description
This model is designed to protect group anddistribution networks with inductive and active loads. The BA47 100 device can be used both in domestic and industrial power networks. At the moment, this device has 80 types for 10 rated currents.
The advantages of these models, consumers include:
- the presence of an independent indicator of the position of the contacts;
- presence of DIN-rail latch in the design;
- increased communication ability.
This model, among other things, can be used, for example, in residential buildings as an introductory device. The technical characteristics of the EKF DF47 100 machines, judging by the feedback from consumers, are simply excellent. At the moment, this is one of the most popular EKF RCD models.
Specifications 47-100
This machine has IP-20 degree of protection. Its mechanical wear resistance is at least 20 thousand cycles, and electrical - 6 thousand. The operating temperature range for this model is from -40 to +50 ° С.
The model is designed for a frequency of 50 Hz and a rated voltage of 220 V. The rated current values \u200b\u200bfor it are equal to 10, 16, 25, 32, 40, 50, 63, 80, 100. The rated breaking capacity of BA47 100 is 10 000. Wires to this machine can be connected with a cross section of 35 mm2.
Model overview 47-29
These machines are designed to protect networks with different loads. BA47 29 can be used, for example, when arranging room lighting, for various kindsengines (fans, compressors, pumps, lifts), etc. The manufacturer, among other things, recommends them as input-distribution devices in public and residential buildings. Versions this model has 200 for 18 rated currents.
Specifications for model 47-29
This circuit breaker, like other models of EKF circuit breakers, has received good reviews from consumers and specialists, primarily because it is distinguished by a high degree of reliability, ease of operation and long service life. The device 47-29 is installed in apartments and country houses quite often.
Technical characteristics model BA47 29 has the following:
- operating temperature range - from -40 to +50 °С;
- voltage per 1 pole - no more than 48 V;
- mechanical wear resistance - 20 thousand cycles;
- maximum wire size 25mm2.
Electrical durability of this model is rated for 6k cycles.
EKF PROxima Switches
These models belong to the group of new generation safety devices. Among other things, EKF PROxima circuit breakers are supplemented with "Test" buttons to check their performance without prior installation. Also devices of this series have:
- contact indicators;
- connection elements for U-shaped busbar Fork.
Rated current for PROxima models is 25 A, leakage current is 30 A. Short-circuit breaking capacityequals 4.5 kA.
Where to install
To choose a protective device EKF by power, of course, you need to take into account the expected load on the network. Otherwise, the device will quickly burn out, and the owners of the property will be left without the possibility of using household appliances and even without lighting until it is replaced.
The technology for installing EKF machines, reviews of which are also good, and therefore, in most cases, the standard one is used. The place of installation for such devices is chosen depending on the purpose for which they want to use them. If, for example, the machine is purchased to protect all the wiring in the house, of course, you need to install it on the shield, next to the meter. It is at this point that the internal wiring begins.
Sometimes property owners only want to protect one particular appliance with EKF. In this case, the machine is installed in the immediate vicinity of such household appliances. RCDs from this manufacturer can be connected both to built-in and to separate DIN rails.
How to connect
Mounting schemes for EKF differential circuit breakers can be used several. In city apartments and country houses, connection technology with a single RCD is most often implemented. In this case, the device in most cases is mounted next to the counter. All available electrical circuits in this case are connected to the RCBO.
Experts recommend installing a switch at the beginning of each end circuit when installing a differential machine. This iswill allow in the future to carry out repairs of electrical wiring in a group of rooms without the need to de-energize other rooms.
First, during installation, power wires from the meter are connected to the difavtomat EKF. Further, those to which the apartment wiring joins are brought to it.
Sometimes machines of this brand are mounted using a two-level scheme. Such systems are considered more reliable and easy to use. In this case, the machine is also connected after the counter. Further, the wires coming out of it are connected in parallel to several RCDs, each of which will subsequently be responsible for a certain circuit in the dwelling. When using such a scheme, it is allowed to mount not too powerful second-level dif-devices into the network.
Installation errors
When installing an EKF RCD in an apartment or house, you should, among other things, avoid such common shortcomings:
- interlacing zero wires into a single knot;
- connection of zero and protective conductor after the machine;
- open-phase connection;
- connecting the neutral wire after the machine to a common zero bus.
When connecting the EKF, of course, among other things, you should not confuse the terminals of the poles. That is, it is not allowed, for example, to connect the zero pole in parallel with respect to the phase one.
