Surge protective device, protect against lightning surge voltages in solar system (photovoltaic
power supply system).
These units must be installed in parallel on the dc networks to be protected and provide common
and different modes protection. Its installed location are recommended at both ends of the dc
power supply line (solar panel side and inverter/converter side), especially if the line routing is
external and long.
This series of surge protector device(SPD)is suitable for new energy solar power generation system, and the maximum continuous working voltage is DC500V, 800V, 1000V, 1200V. The installation position is in the DC power supply system to protect indirect lightning current, direct lightning current or other transient overvoltage.
Surge protective device, protect against lightning surge voltages in solar system (photovoltaic power supply system).
These units must be installed in parallel on the DC networks to be protected and provide common and different modes protection. Its installed location are recommended at both ends of the DC power supply line (solar panel side and inverter/converter side), especially if the line routing is external and long.
High energy MOVs equipped with specific thermal disconnectors and related failure indicators.
The second level of power supply lightning protector using Class C protector for phase - in, phase - ground and in - ground full mode protection, the main technical parameters are: lightning through-current capacity greater than or equal to 40KA (8/20μs); residual voltage peak is not greater than 1000V; response time is not greater than 25ns.
The third level of protection
The purpose is the ultimate means of protecting equipment, the value of the residual surge voltage is reduced to within 1000V, so that the energy of the surge does not damage the equipment.
In the electronic information equipment AC power inlet end of the power supply lightning protector installed as the third level of protection should be series-limited power supply lightning protector, its lightning through-current capacity should not be less than 10KA.
The last line of protection can be used in the internal power supply part of the power equipment with a built-in power supply lightning arrester, in order to completely eliminate the purpose of the small transient overvoltage. The power supply lightning arrester used there requires a maximum impact capacity of 20KA per phase or less, the required limiting voltage should be less than 1000V. For some particularly important or sensitive electronic equipment with the third level of protection is necessary, but also to protect power-using equipment from the transient overvoltage generated within the system.
For microwave communication equipment, mobile station communication equipment and radar equipment, such as the use of rectifier power supply, depending on its working voltage protection needs are appropriate to choose the working voltage of the appropriate DC power lightning arrester as the last level of protection.
Fourth level and above
According to the voltage level of the protected equipment, if two levels of lightning protection can be done to limit the voltage below the level of the equipment, only two levels of protection are required, if the level of voltage resistance of the equipment is low, it may require four or more levels of protection. The fourth level of protection whose lightning through-current capacity should not be less than 5KA. [3]
