Brochure/Catalogue

Surge protection forum
Construction standards/directives/legal basis
The continued availability of electrical
and electronic equipment and systems
is critical. It is therefore important
to prevent loss and faults that are
frequently caused by overvoltage
events. It is for this reason that there
are standards and directives for
lightning and surge protection that
cover buildings, parts of buildings,
structural and technical installations
(objects).
The technical committee IEC TC 81
deals with lightning protection issues
worldwide. The new IEC 62305
standard was introduced following
a decision in October 2001. Since
January 2006, IEC 62305 has been
divided into four parts:
• IEC 62305-1: General principles
• IEC 62305-2: Risk management
• IEC 62305-3: Physical damage to
structures and life
hazard
• IEC 62305-4: Electrical and
electronic
systems within
structures
The German committee responsible
for German implementation decided to
maintain the VDE classication of the
new standard series DIN EN 62305 as
VDE 0185-305 parts 1-4.
Country-specic standards and directives
Country-specic standards and
directives
• DIN EN 62305-1
(VDE 0185-305-1)
• DIN EN 62305-2
(VDE 0185-305-2)
• DIN EN 62305-3
(VDE 0185-305-3
• DIN EN 62305-4
(VDE 0185-305-4)
It is known that lighting protection
equipotential bonding is not sufcient
in itself to protect electrical equipment
from voltage surges.
On account of that, standards such as:
• DIN VDE 0100 part 410
• DIN VDE 0100 part 540
• DIN VDE 0100 part 443
• DIN VDE 0100 part 534
• DIN VDE 0800 part 1
• DIN VDE 0800 part 2
• DIN VDE 0800 part 10
• DIN VDE 0845 part 1
• DIN VDE 0845 part 2
explicitly require measures for
protection against voltage surges.
In DIN VDE 0100, the surge protection
measures for low-voltage installations
and, in the DIN VDE 0800 standard,
the surge protection measures for
communication engineering as a whole
are described. Appendix A of DIN V
VDE V 0100-534 shows the selectively
graded use of surge arresters of Type I
(B arresters) in the main power supply,
Type II (C arresters) in the sub-circuit
distribution board and Type III (D
arresters) in the area of the nal circuit.
Appendix A of DIN V VDE V 0100
part 534.
IEC 61643-5-53 has been available
since 2002. It is implemented in
VDE 0100-534 and describes the
selection and installation of surge
protection for electrical facilities.
This is intended as a replacement for
DIN VDE 0100-534. The international
equivalent is IEC 60364-5-53:2002-06.
The chapter 534: “Devices for
protection against overvoltages”
contains the devices for protection
against overvoltages, the selection
of these and their use in the building
installation. The rules that apply on
the low voltage side are adapted to
communication electronics as a whole
and are described by the national
series of standards 0800 parts 1, 2
and 10 and 0845 parts 1 and 2.
DIN VDE 0800 describes general
issues such as earthing, equipotential
bonding, etc. and DIN VDE 0845
the measures for protecting against
overvoltage events of all kinds.
Guidelines of the loss insurers
The guidelines apply to decisions on
whether lightning and surge protection
is to be provided for buildings, parts
of buildings, structural and technical
installations. The guidelines become,
on agreement, a binding part of the
insurance contract between insurer
and policyholder.
However, their application does
not exempt the insured party from
observance of legislation, statutory
instruments, ofcial requirements and
generally accepted codes of practice
such as that described in the DIN VDE
standards.The building regulations of
different countries and the relevant
statutory and ofcial regulations and
codes of practice, call for lightning
protection systems to be installed in
certain buildings for reasons of public
safety, e.g. in shops, hospitals, schools
HPAS
PAS
R
B
R
A
F
1
F
3
F
2
F
2
L1
L2
L3
N
PE
L
N
PE
Wh
Lightning arrester
Type I
Overvoltage arrester
Type II
Equipment protection
Type III
Protection acc. to IEC 1024-1, IEC 1312-1
Protection acc. to IEC 364-4-443
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The basics of lightning and surge protection
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