Electrical systems

Energy distribution, energy saving and people safety

The modern electrical systems include a variety of modules and systems for re-distribution and energy saving, while at the same time they ensure the safety of the people from the physiological effects of the electric current.  On the other hand, special devices protect important electrical devices from technical failure from high voltage or excessive current. Modern low-voltage electrical installations include electrical panels, different types of cables, automatic fuses, current protection, voltage suppressors and energy efficiency systems.

 

 

 

 

Lightning protection

Lightnings are perils of nature, which can cause material loss, human injury or death. A lightning protection system can be one of two types – active and passive. The passive system includes a receiver, which is basically a metal rod made from a material, which is a good conductor, such as copper, aluminum or steel. The rod is grounded, so the falling lightning is directed to the ground and the building is protected from a direct hit. The active receivers on the other hand, are today’s most advanced systems for lightning protection. They work of the principle of “advanced action”, in which by electrical or electromechanical way ionization is caused to occur on the tip of the metal rod (the receiver), which at that moment starts the process of movement of an electric charge upwards, toward the clouds faster than the speed with which lightning moves in nature. The upward-moving charge meets with the downward moving one, and the lightning never reaches the tip of the receiver rod or the ground. This method is the most effective and is widely used to protect large areas, such as stadiums, hypermarkets, airports, hotel complexes, etc.

 

Protection of electrical wires from excessive current and overheating

Short circuit or excessive current in electric wires can lead to overheating, burning of the insulation and even fire in the building. Te automatic fuses have the task of interrupting the electric circuits in order to eliminate the possibility of dangerous consequences of excess current or short circuit. It is important to note, that fuses do no protect people or equipment. That protection is accomplished by using other devices, such as Residual Current Devices (RCD) and surge protectors.

 

Light control

Electrical installations can include systems for controlling the lighting, which can be used for both comfort and energy saving. One type of such system includes motion detector sensors, which automatically turn on the lights as soon as someone enters the room/area. Another way is to use photovoltaic elements, which can turn on or off the outside lights, based on the light level of the environment or predetermined light level or schedule. It is also beneficial to use devices, which can turn off the lights after a certain predetermined amount of time, like the ones frequently used for stairwells.