Rooftop photovoltaic power station users how to fire?

'One,' dc arc fault. The service life of the household photovoltaic system, theory - in 20 years 25 years, but with the increase of fixed number of year of the photovoltaic power plant put into operation, the inverter electronic components will be aging, cable breakdown, such problems as loose contact, these are

in the first place, to prevent 'DC arc fault'. Domestic photovoltaic system theory for 20 - service life 25 years. However, with the increase of operating life of photovoltaic power station, inverter in the electronic components will be aging, cable fault, the problem such as poor contact. The internal cause of these systems can lead to arc fault. Usually, most of the installation of the pv array using long series high voltage DC power supply, indirectly increased the arc related safety issues. So how to prevent this problem? First of all, from the photovoltaic equipment, select the high reliability and good industry reputation photovoltaic (pv) grid inverter. Secondly, from the Angle of construction, photovoltaic system design should be strictly enforce national standards, design specifications, to ensure construction quality. If construction quality guaranteed, crack appeared in the course of engineering components and wiring bad problems can be reduced to some extent, these problems particularly high probability in engineering. In addition, the lightning protection and grounding system shall be prepared, in order to prevent the induction lightning damage to the equipment. Second, the cable fire prevention measures. Have been to the scene of the pv project people will always be attracted to the cable, because there is no one or two cables, too much! From the elements to the inverter has many connections, they are widely distributed. Although cable should have a good fire protection, but in the actual process often appears irregular cable wiring. Once the cable is on fire, would be devastating, did not have a good remedy. At present, each cable can't be in the site of the project location equipment installation. In order to prevent hidden danger, refractory isolation and flame retardant cable in cable trench is usually used as the main measures of dealing with the cable fire. In the grooves and centered in the installation of cable slot box, grade C or above should be selected for the flame retardant cable. In addition, the partition of the pipe and cable should be through the roof power station and the holes and cracks on the floor with flame retardant materials or non-combustible material tight seal, in order to prevent cable fire after each other to spread. Third, the protection should be done before it happens. Efforts should be from transport and maintenance. Many users have a misconception that photovoltaic system is completed, it doesn't matter! Very few people go to regular inspection and maintenance. Earlier, some users still use photovoltaic modules drying vegetables, this really let a person feel anxiety. They do not only operation and maintenance, but also 'fuel', this is really hard to describe. For the user, the regular maintenance of power station is very important. First of all, it is necessary to check the photovoltaic equipment for disease, extended service or overload operation. When necessary, wear insulated shoes, a low-voltage insulating gloves, use insulated tools. After the completion of the work, should eliminate the potential accident in the system. Second, the students to form good habit of regular cleaning parts, to ensure that the parts surface is clean, no bird droppings and leaves. Finally, should be prepared to safety during inspection. All should disconnect switch should be disconnected, to ensure the completely discharge the capacitor and inductor.