The weak - force.

By Admin | Electrical Light
09 May 2016

«last resort" during the design and construction of a country house should not be.All you need to provide in advance: the ventilation ducts and chimneys, and hidden under the wire finishing panels on which the weak currents flow.Any conductor according to the regulations, must be within the special cable channel or in the wall.

So, the first rule: low-voltage systems should be integrated into the overall design of the house in the same way as electricity or heating system.There is no provision for this space is usually not required - the system takes a minimum amount.But unless you need the extra hole in the already decorated the walls and ceilings?It happens that the finished facade has to be drilled, and then cover up the holes, if required, for example, set the bracket for camera surveillance.That's why the designers at home from the very beginning should be made aware of your requests on the part of alarm systems, video surveillance, telephony, Internet, television, and so on.

Another rule, which is regulated by the regulations in regard to interaction of strong and weak current.Strong current - is live wires 220 or 380 (usually the power cables that bring power to various customers).Weak current - a low-power signals, which in most cases transmit specific information.

As we know from physics, around the conductors creates an electromagnetic field, and the greater the current flow, the stronger the field.It is understood that the electromagnetic field of the power cable - a pretty powerful and can, in principle, interfere with and distort the information passing nearby low-voltage conductors.And who, say, you need to crack the phone, ripples on the TV screen and the false fire alarm system?

For this reason it is not recommended to lay the cable in one channel power and low-voltage conductors.Those standards require these vehicles to carry a distance of 400-500 mm in order to prevent the guidance of electromagnetic fields.

from fire and thieves

If low-voltage systems list in order of importance, the first place, no doubt, shared systems, fire and burglar alarm systems.It often happens that the timely operation of the sensor and the response of the fire brigade rescue property, at least help to prevent serious property damage.The same applies to the signals of the penetration of outsiders into the house - if it finds time security service, you will not have time to make anything (and do not have time to burn your house, as they do sometimes, to cover their tracks).

main task of fire alarm systems are early detection of a fire by means of fire detectors and signaling control of the means of fire automatics.These systems are divided into addressless (threshold), address and analogue addressable.

traditional unaddressed in our market system - the cheapest but least efficient.The most effective analogue addressable fire detectors systems, in fact, are sensors that periodically, at the request of the receiving-control device, according to his code of values ​​of controlled parameters: temperature or smoke.Thresholds set in the control panel and adapt to each room.Addressable systems occupy an intermediate position between addressless and analogue addressable systems - both in performance and cost.

is interesting to note the following fact: in the West, the cost of insurance an individual house depends on the type of fire alarm system.Therefore, the homeowner is more profitable to install expensive analogue addressable system than to make out an expensive insurance in the case of primitive and cheap alarm.We, of course, this relationship is not yet visible, but in the future, I think, we will come to the same principle of insurance suburban real estate.

Perimeter also applies to low-voltage systems.Perimeter - is the outer contour of the protected area, the intersection of which causes an alarm indicating (preferably accurate) the place of infringement.

Universal perimeter security system there.Selection of the most effective depends on many factors, particularly on the location and characteristics of the protected object.

informed design decisions when equipped with the modern perimeter alarm system is only possible when all the conditions, especially the feasibility of installing such a system.Typically, such systems are used to protect an area of ​​suburban areas is not less than 0.5 hectares.That is a large individual plot, whose boundaries can not be seen visually or land on which the well-appointed conglomerate assume a gated development.A prerequisite for this - the presence in the area or nearby a constant guard post.Otherwise it makes no sense to use electronic detectors, signaling the entry into the territory: the attackers simply ignore the alarm and bring forth all that they need.

system security and alarm systems more individualized, and it can be used on almost any object.

system security and alarm systems is a set of technical means of registration to penetration attackers on the protected object, providing information about the penetration as well as the issuance of alarm protection bodies.

level of security depends largely on the response time of means of protection for emerging threats.The sooner a threat is detected the object, the more effectively you can avoid trouble.This requires the right choice and proper use of technical means, as well as their optimal placement in protected areas.

When installing such a system may be a dilemma: how to give preference to sensors - external or internal?The standard set of internal security sensors include magnetic contact sensors that react to breaking glass, internal infrared motion sensors.They are all good, but can detect an intruder when he entered the house.But such a scenario can not always ensure the safety of the owner of the house.Experience shows that the best option for the defense system of a country house - is the creation of buffer zone width of 2-5 meters along the perimeter of the building with infrared motion sensors installed on the outside walls.This system allows the attacker to detect intrusion into the house.

low-current surveillance system must provide a record video from cameras at the facility while maintaining the archive in the week view of the current image and the stored records at the facility, as well as the transfer of video images at a distance for remote video or the ability to extract the media to view the video archive.Get visual information about guarded object only allows television equipment.The specifics of the problems solved with the help of video surveillance systems, making them, in some cases irreplaceable.Television cameras, demonstratively set on the object, can deter potential criminals and covert surveillance allows the operator to control the situation at the facility.Video surveillance systems are a major means of support alarm systems and access control, and are often associated with them on the software or hardware levels.

With CCTV in the preparation of the alarm can be set nature of the infringement, a violation, the direction of the offender and select countermeasures.

Communication Technology with the world

second large group of low-voltage systems can be attributed to the sphere of communication.The first thing to mention the telephone system, which is in some places in the country.Of course, most suburban residents use mobile communication, but if the house is not far from St. Petersburg and close to a major population center, the possibility of laying telephone cable and fixed telephony software.Installation of such a system is no different from the urban telephony equipment: subject to the same rules and regulations, and the equipment of the same.

If the developer provides a dedicated Internet line, increases the prestige of the place.Although advances in technology may soon displace and this service as more and more users go online via mobile phones, and satellites.

Another communication system - a system of terrestrial and satellite television reception.TV we are accustomed to at home and at the cottage.But if the city is set on the roof antenna collective, out of town, alas, no.There will have to install the antenna yourself.Those who have enough of the reception (the number of TV programs and image quality), become even a satellite dish.In a modern country house is often not one but several TV spaced far enough, causing the need for laying inside the cottage cable distribution network.And in each case the connection wiring and setting are different.In addition, rough terrain very many areas of poor reception, and should be especially careful to configure the hardware.

more to low-current systems include integrating a system called "Smart House".But it is, I think, deserves a separate discussion.

In conclusion we note that the construction of low-voltage systems at home "by eye" - there is at least evidence of lack of professionalism, or even a serious breach of engineering standards

Mikhail Skvortsov

zagorod.spb.ru