The main point to selection of a Type 2 SPD is Maximum discharge current Imax
To Selection of a Type 1 SPD, according to the following two points:
1.Impulse current Iimp;
2.Autoextinguish follow current Ifi
Common characteristics of SPDs include:
Operating voltage Uc;
Voltage protection level Up (at In);
Number of poles
A SPD must always be installed at the origin of the electrical installation.
To protect an electrical installation in a building, simple rules apply for the choice of: 1.SPD(s); 2.its protection system.
The Surge Protection Device (SPD) is a component of the electrical installation protection system.
This device is connected in parallel on the power supply circuit of the loads that it has to protect. It can also be used at all levels of the power supply network.
This is the most commonly used and most efficient type of overvoltage protection.