Lightning Protection - Leica GR10 User Manual

1.5.4
DANGER
Warranty exclusion
Lightning Protec-
tion Zones
GR10/GR25, Safety Directions

Lightning Protection

Lightning strikes can cause severe damage to structures, devices, services and human
life. Therefore it is essential to consult an authorised specialist to design and install a
means for reliable and efficient lightning protection.
The protection must consider all elements of your receiver installation, that is:
• Devices, for example receiver, GNSS antenna, meteo stations, radio communi-
cations (cellular mobile, terrestrial), switches, routers
• Power lines
• Signal lines, for example from an antenna
• Communication and data lines, for example Ethernet or serial
• Structures, for example building, mast, cabinet
• Solar panels
Lightning may ignore every defence man can conceive. A systematic hazard mitigation
approach to lightning safety is a prudent course of action.
The warranty of the receiver does not apply to, and Leica Geosystems is not respon-
sible for defects, malfunctioning or performance issues resulting from:
• Damage caused by lightning or any other electrical discharge.
Lightning Protection Zones (LPZ) can be divided into:
Zone Description
External Zones which are at risk from direct lightning strikes, from impulse
currents up to the whole lightning current and from the whole elec-
LPZ 0A, LPZ 0B
tromagnetic field of the flash of lightning.
Internal Zones where impulse currents are limited by splitting the current
and by Surge Protective Devices (SPDs) at the zones boundaries.
LPZ 1...n
The electromagnetic field of the lightning flash can be attenuated
by spatial shielding.
At the boundary of each internal zone, the equipotential bonding must be carried out
for all metal components and utility lines entering the building or structure. Equipo-
tential bonding is done directly or with suitable SPDs.
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