Page 4 - DS225 Modern-buildings

Good reasons to act Preventing danger

Requirements and risks Lightning and surge protection

Why do professional protection measures make sense? There are many good reasons: Lightning and surge protection are indispensable when it comes to protecting people,
Technology, system and services must be permanently available, climatic conditions are preventing fires and guarding important networked systems against failure.
changing, standards and risks, systems and services must be considered.

Considering changes Providing safety

Our climate is changing and extreme weather is becoming more common. The risk of lightning strikes and fire or damage due Failure to take proper lightning and surge protection precautions can, in the worst case, result in serious injury or even loss of
to surges is increasing, lightning strikes even in winter seasons. At the same time, living comfort and modern work and pro- life. Fires, malfunctions or lack of availability of important systems also have serious consequences – especially for intelligent
duction processes are dependent on sensitive networked technology, e.g. lighting strikes even in winter seasons. building systems. Failure of individual networked components, e.g. due to surge damage, may cause entire systems to collapse,
Profound changes in global power generation pose another special challenge. Network parameters have changed due to the paralysing whole buildings or work and production processes. For companies, downtime is not just a matter of high costs and
decentralised supply from renewable energy sources. Isolated grids and storage systems are particularly susceptible to surges. the effort involved in repairing the damage, it may threaten their very existence.

Dangerous mixture

24 / 7

Protect human lives Prevent fire Avoid stop of production Provide permanent security
and data loss
About 1.4 billion lightning Damage radius of 2 km Networked building Permanent availability
flashes per year worldwide 1) around the point of strike technology required

Lightning protection zone concept
Fulfilling requirements
The lightning protection zone concept according to
Standards and federal or municipal building regulations call for lightning and Overview of the most important standards: IEC 62305-4 makes it easier to plan, implement and
surge protection measures. There are different requirements for buildings with ‚ Lightning protection: IEC 62305, 1- 4 monitor surge protection measures. A building is divided
and without an external lightning protection system. A detailed overview of into zones with different risk potential. Inner and outer light- LPZ 0
the relevant standards and legal stipulations can be found in chapter 1 of our ‚ Surge protection: ning protection zones are defined according to IEC 62305-4
Lightning Protection Guide (www.de.hn/lpg). IEC 60364-4-44 clause 443 depending on the lightning threat. Based on these zones,
IEC 60364-4-44 clause 444 it is determined where measures or arresters are required.
IEC 60364-5-53 clause 534 LPZ 1
IEC 60364-5-54 LPZ 2
‚ Earthing: DIN 18014, IEC 61936-1 ‚ LPZ 0: Zones outside the building subjected to direct
lightning effects, no shielding against LEMP
Identification of risks and determination of the risk potential ‚ LPZ 1: Zone inside the building with a low risk LPZ 2
of partial lightning energies
‚ LPZ 2 - LPZ n: Further zones inside the building
Risk management according to IEC 62305-2 with decreasing surge-related risks
Fire
Fire Simplified diagram
Person Person A risk analysis allows you to assess and deter- More information at www.de.hn/lpg.
mine the risk potential for structures. This risk
Surges Surges analysis forms the basis for specific measures
S 1 S 3
RISKS RISKS to minimise the risks.
Effective protection concept
The aim of risk management is to define
economically optimal protection measures – Avoid taking unnecessary risks by way of an effective lightning and surge protection concept. This means including the following
Surges tailored to the building characteristics and use. measures in your designs and planning right from the start:
Surges
‚ Earthing / equipotential bonding
S 2 S 4
‚ External lightning protection
‚ Surge protection

4 1) Source: “Where LightningStrikes”. NASA Science. Science News. December 5, 2001. Archived from the original on July 16, 2010. Retrieved July 5, 2010. 5