—
02 The LPZ concept
In general the higher the number the zone
(LPZ LPZ etc) the lower the electromagnetic
effects expected.
LPZ 3
SPD 1/2
—
02
107
TECHNIC REFERENCE IEC/BS 62305 LIGHTNING PROTECTION ZONES (LPZ)
.
SPD 0/1
Equipotential
bonding by
means SPD.
LPZ 1
No direct flash,
partial lightning or
induced current,
damped.
SPD 2/3
(for power and data lines).
Air termination
network.
Figure highlights the LPZ concept applied the
structure and SPM.
LPZ 2
No direct flash,
induced currents,
further damped
magnetic field.
Rolling sphere
radius. Typically, any sensitive
electronic equipment should located higher
numbered LPZs and protected against LEMP
by relevant Surge Protection Measures (SPM as
defined IEC/BS 62305).
Selection the most suitable SPM made using
the risk assessment accordance with
IEC/BS 62305-2.
The general principle that the equipment
requiring protection should located an
LPZ whose electromagnetic characteristics are
compatible with the equipment stress withstand
or immunity capability.—
Technical reference
IEC/BS 62305-1 Lightning protection zones (LPZ)
Lightning protection zones (LPZ)
The concept the Lightning Protection Zone
(LPZ) was introduced within IEC/BS 62305
particularly assist determining the
protection measures required establish
protection measures counter Lightning
Electromagnetic Impulse (LEMP) within
a structure.
LPZ 0
Direct flash, full
lightning current, full
magnetic field.
Earth termination network.
SPM were previously referred LEMP
Protection Measures System (LPMS) IEC/BS EN
62305:2006.
The concept caters for external zones, with risk of
direct lightning strike, partial lightning current
occurring (LPZ and levels protection within
internal zones (LPZ LPZ 2).
LPZ 0
No direct flash, partial
lightning induced current,
full magnetic field.
SPD 0/1
Down conductor network. The concept expanded
upon IEC/BS 62305-3 and IEC/BS 62305-4
