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1.1 Installation standards remaining residual risk is determined. Starting with the un-
protected state of the building, the remaining risk is reduced
With the new IEC 62305 (EN 62305) standard series, the state and reduced until it is below the tolerable risk. This method
of the art in the field of lightning protection is incorporated can be both used for a simple determination of the class of
in a uniform and updated international (European) stand- LPS in accordance with IEC 62305-3 (EN 62305-3) and to
ard. The actual lightning protection standards (IEC 62305-3 establish a complex protection system against lightning elec-
(EN 62305-3) and IEC 62305-4 (EN 62305-4)) are preceded by tromagnetic impulses (LEMP) in accordance with IEC 62305-4
two general standard parts (IEC 62305-1 (EN 62305-1) and (EN 62305-4).
62305-2 (EN 62305-2)) (Table 1.1.1). The supplements to
the German standards include important national information Supplement 1 of the German DIN EN 62305-2 stand-
(Table 1.1.2). ard (Supplement 1 of the German VDE 0185-305-2
standard): Lightning threat in Germany
IEC 62305-1 (EN 62305-1): General principles This supplement includes a map of the ground flash density
This part contains information about the risk of lightning N g in Germany. N g is required for a risk analysis according to
strikes, lightning characteristics and the resulting parameters IEC 62305-2 (EN 62305-2).
for simulating the effects of lightning strikes. In addition, an
overview of the IEC 62305 (EN 62305) standard series is given. Supplement 2 of the German DIN EN 62305-2 stand-
Procedures and protection principles, which form the basis for ard (Supplement 2 of the German VDE 0185-305-2
the following parts, are explained. standard): Calculation assistance for assessment of
risk for structures
IEC 62305-2 (EN 62305-2): Risk management This supplement includes a calculation assistance for as-
Risk management in accordance with IEC 62305-2 sessing the risk according to IEC 62305-2 (EN 62305-2)
(EN 62305-2) includes a risk analysis to determine whether to protect structures and persons according to IEC 62305-3
lightning protection is required. A technically and economi- (EN 62305-3) as well as electrical and electronic systems in
cally optimum protection measure is then defined. Finally, the structures according to IEC 62305-4 (EN 62305-4).

Classification Title
IEC 62305-1 (EN 62305-1):2010-12 Protection against lightning Part 1: General principles
IEC 62305-2 (EN 62305-2):2010-12 Protection against lightning Part 2: Risk management
IEC 62305-3 (EN 62305-3):2010-12 Protection against lightning Part 3: Physical damage to structures and life hazard
IEC 62305-4 (EN 62305-4):2010-12 Protection against lightning Part 4: Electrical and electronic systems within structures
Table 1.1.1 Lightning protection standards valid since December 2010

Standard Supplement Title
1 Lightning threat in Germany
DIN EN 62305-2 2 Calculation assistance for assessment of risk for structures
3 Additional information for the application of DIN EN 62305-2 (VDE 0185-305-2)
1 Additional information for the application of DIN EN 62305-3 (VDE 0185-305-3)
2 Additional information for special structures
DIN EN 62305-3 3 Additional information for the testing and maintenance of lightning protection systems
4 Use of metallic roofs in lightning protection systems
5 Lightning and overvoltage protection for photovoltaic power supply systems
DIN EN 62305-4 1 Sharing of the lightning current
Table 1.1.2 Supplements to the German DIN EN 62305 standard

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