Siemens TL.. Provozní pokyny stáhnout pdf (Strana 26)

Application

3.11 Grounding and lightning protection

3.11.2 Lightning protection

A lightning protection system consists of an external lightning protection system and an internal lightning

protection system.

Using appropriate external lightning protection, the effect of a direct lightning strike into a building can be

mitigated in a controlled way, and the lightning current can be discharged into the ground.

Measures in an external lightning protection include a lightning collector, a lightning arrester, and a

grounding system.

The task of a lightning collector is to prevent direct lightning strikes.

The arrangement and positioning of lightning collectors can be established using three methods:

• Rolling ball method

• Mesh method

• Protection angle method

If the inverter station has a roof made of metal that runs around the roof corners, lightning rods can be

attached to the corners of the station roof.

The lightning conductor has the task of passing the captured lightning current to a grounding system

without leading to undue rises in temperature and mechanical damage.

In a Class III lightning protection system, the typical distance between the lightning conductors in the

same system is 15 m.

The lightning conductors should be connected to the metal roof and must lead directly to the grounding

system.

Measures for interior lightning protection to protect the inverter against mechanical damage include a

surge arrester (Classes I and II) and central potential equalization.

Each inverter station must be provided with central equipotential bonding connected to the grounding

system.

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