Overview of VA 47-63 EKF PROxima circuit breakers

To protect electric lines in the modern world, circuit breakers are used. Modular devices are the most popular automatic machines that can be found in every electrical panel: in any apartment or house, in control cabinets at industrial enterprises and in shopping centers - wherever there are at least some lines of electrical energy supply. Circuit breakers are mainly used to protect cables and electric lines from overload and short circuits. Thus, they protect electrical equipment from overheating. The range of fixed rated currents of modular automatic machines also allows their limited use to protect electric motors and transformers.

Why are machines called modular? Because they have the same size housing in the form of single-pole modules, from which two-, three- and four-pole machines are assembled. The width of one module is standardized and equal to 18 mm. Thus, a single-pole circuit breaker will occupy one module on a DIN rail. Some models of machines have a case width baboutsmaller than the width of the standard module, however, it still remains a multiple of 0.5 module. In this article we will consider the VA 47-63 EKF PROxima circuit breakers, their features and advantages.

Product lines and applications

Modular circuit breakers are widely used in projects of any orientation. They are installed in the power supply systems of industrial enterprises, infrastructure, administrative and commercial facilities - various institutions, shopping and business centers, shops, etc. You can find compact modular automatic machines in any floor or apartment panel, they serve as the "last line of defense" - they protect all home electrical circuits. For each object, you need to select automata depending on the parameters of the electrical network.

EKF offers three series of modular equipment in its product range:

The Averes line is initially designed for industry, it includes three series of machines - with a maximum switching capacity (PKS) of 6 and 10 kA, as well as 6 kA for DC networks.

PROxima is the optimal range in terms of high quality and affordable price, it produces four series of switches: VA 47-63 with PKS of 4.5 and 6 kA, VA 47-100 and VA 47-125.

In the EKF Basic line, there is one model of a budgetary circuit breaker. VA 47-29В is most popular in residential real estate construction projects.

Modular machines PROxima

Consider the PROxima line. It includes all the necessary products to complete 98% of projects in construction and infrastructure.

The PROxima line includes four series of modular circuit breakers with rated currents from 0.5 to 125A.

The most popular series is VA 47-63 4.5kA. A choice of circuit breakers with tripping characteristics B, C, D. At 1, 2, 3, 4 poles.With rated currents from 0.5 to 63A. All construction projects can be completed on the basis of this line.

Where devices with a high limit switching capacity (PKS) are needed, VA 47-63 6kA is used. In this series, you can choose a single, double or triple-pole circuit breaker.

For industrial projects where short-circuit currents can reach 10kA or 15kA, automatic machines of the series VA 47-100 and VA 47-125 are used. These machines have a housing of 1.5 modules, which is due to the large PKS.

Name	PKS kA	In, A	BTX	Poles
VA47-63	4,5	0,5-63	B, c, d	1-4P
VA47-63	6	6-63	B, c, d	1-4P
VA47-100	10	10-125	C, D	1-4P
VA47-125	15	80-125	C, D	1-4P

A complete set of accessories allows you to use the PROxima line in all automation projects.

As already mentioned, the EKF PROxima VA 47-63 circuit breaker is most popular.

Why choose VA 47-63

First of all, it is a unique design developed by one of the leading design agencies. You may ask, why does a modular machine need a special design? First of all, because it is sold at retail. VA 47-63 compares favorably with its competitors on the shelf, and the retail buyer is more likely to choose it. And at the same time he will not make a mistake as a circuit breaker.

The quality of the machine is confirmed by a warranty period of 7 years, which is another serious advantage of EKF products.

Other benefits relate to professional users of VA 47-63.

These include the ability to lock the lever. It allows you to safely carry out repairs protected by automatic machine line. An electrician will be calm by locking the machine in the off state.

The EKF VA 47-63 circuit breaker has increased body rigidity, a cast front panel, the status window is closed with a transparent cover - everything is done in order to limit the plasma that is formed at the moment of opening by the body in case of a short circuit. This ensures human safety.

It would seem that when a person can be near a machine that turns off by short circuit? But such a situation does happen - this is a very crucial moment of the first start-up of the electrical installation, if the user (a competent electrician will never do this) made the connection incorrectly and shorted the line. VA 47-63 in such a situation will clearly work out by short circuit and leave all the energy of the short circuit inside the housing on the arcing chamber. Man will not suffer. Automata, consisting of two halves on the front panel, with status windows not covered by the lid, have a chance to allow sparks to exit the front panel, which is not safe.

In the circuit breaker there is an element that must be heated - this is a thermal release. Profile grooves on the sides of the PROxima machine provide a more comfortable temperature level for the machine to work, cooling it. The machine, which has the ability to cool, works more stably.

Screws with increased hardness allow you to more reliably tighten the attached conductor, thereby providing better contact. A good contact of the connected conductor is very important, because if there is insufficient contact, the connection point begins to heat up, which can lead to the breaker failure or, worst of all, to the fire.

Another technical feature designed to reliably hold the conductor in the terminal is the square shape of the terminal. This is done in order to reliably hold not only cables with a cross section of 2.5 mm²but also 0.5 mm². We remember that the nomenclature series VA 47-63 starts with a nominal value of 0.5A, and with this current, lay a 2.5 mm wire² does not make sense and is expensive.

Terminals BA 47-63 allow connecting conductors from both copper and aluminum, but not together.Everything is clear with copper - PUE recommends it. A new aluminum alloy has been developed that is close to copper in mechanical characteristics. It is this alloy that is supposed to be used for cheaper projects in the construction of residential buildings. VA 47-63 is ready to work with him.

The two-position clamp allows you to conveniently place the VA 47-63 on a DIN rail. A special recess for a Phillips screwdriver allows, if necessary, to remove the circuit breaker with a Phillips screwdriver, which electricians usually work by connecting conductors. This is a convenient feature of EKF machines. For devices of other brands, you will need a flat screwdriver, since there are not enough holes to hook the clamp of the machine.

The listed advantages are possessed not only by circuit breakers, but also by all products of the EKF PROxima line - both by circuit breakers of differential current, and by RCD, and by circuit breakers.

Using modular automation of the PROxima series, you can assemble any project in construction and most of the projects in the industry.

To summarize the benefits, then PROxima:

• It has optimal functionality
• Ensures convenience and speed of installation
• Has 7 years warranty