FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions, abbreviations and symbols
4 Relevant threats - Lightning current parameters
5 Arrangement of SPDs within the Lightning Protection
Zones concept
5.1 Lightning protection zones
5.2 Zone definitions
5.3 Arrangement of SPDs at the zone interfaces
6 SPD performance requirements
6.1 Transition from LPZ OA to LPZ 1
6.2 Transition from LPZ OB and LPZ 1
6.3 Transition from LPZ 1 to LPZ 2
7 Energy coordination
7.1 General objective of coordination
7.2 Fundamental coordination principles
7.2.1 General
7.2.2 Coordination of voltage limiting type
SPDs
7.2.3 Coordination between voltage switching
type and voltage limiting type SPDs
7.2.4 Coordination between voltage switching
type SPDs
7.3 Basic coordination variants for protection
systems
7.4 Coordination method according to "let-through
energy" (LTE)
7.5 Coordination between an SPD and the equipment
to be protected
7.5.1 Selection of the SPD
7.5.2 Place of installation
8 Summary
Annex A (informative) Examples for coordination between two
SPDs
A.1 - Example of coordination between voltage limiting
type SPDs
A.2 - Example of coordination between voltage switching
type SPD and voltage limiting type SPD
Annex B (informative) Influencing factors on the lightning
current distribution in a system to be
protected
B.1 - Influencing the lightning current distribution
in the low-voltage system
B.1.1 - Influence of supplying cables
B.1.2 - Influence of the transformer
B.1.3 - Influence of the earthing system
B.1.4 - Influence of parallel consumers
B.1.5 - Simplified calculation method
B.1.6 - Simplified calculation for SPD
requirements
Annex C (informative) Place of installation of SPD
C.1 - Place of installation
Bibliography
Figure 1a - Example for dividing a structure into several
LPZs and adequate bonding
Figure 1b - Example of the design of LPZs with a single SPD
and a double-shielded cable
Figure 2 - Example for dividing a structure into several
LPZs, with the appropriate bonding
Figure 3 - Basic model for energy coordination of SPDs in
structures with a negligible low impedance of the
CBN (see 8.1)
Figure 4a - Basic combination of two SPDs (voltage limiting
type)
Figure 4b - Basic principle for energy coordination of two
SPDs (voltage limiting type)
Figure 5a - Basic combination of two SPDs: voltage switching
type (SPD 1) and voltage limiting type (SPD 2)
Figure 5b - Basic principle for energy coordination of two
SPDs: voltage switching type and voltage
limiting type
Figure 6a - Principle determination of decoupling inductance
for energy coordination 10/350 mus and 0,1 kA/mu s
Figure 6b - Principle determination of decoupling inductance
for energy coordination 10/350 mus and 0,1 kA/mu s
Figure 7 - Coordination principle according to variant I
(voltage limiting type SPDs)
Figure 8 - Coordination principle according to variant II
(voltage limiting type SPDs)
Figure 9 - Coordination principle according to variant III
(voltage switching/voltage limiting type SPDs)
Figure 10 - Coordination principle according to variant IV
Figure 11 - LTE - Coordination method with standard pulse
parameters
Figure A.1 - Circuit diagram for coordination between two
voltage limiting type SPDs
Figure A.2 - Current/voltage characteristics of two SPDs
(voltage limiting type)
Figure A.3 - Current and voltage characteristics at a
combination of two voltage limiting type SPDs
Figure A.4 - Circuit diagram for coordination between
voltage switching type SPD 1 and voltage
limiting type SPD 2
Figure A.5 - Current and voltage characteristics at a
combination of a SPD voltage switching type and
a SPD voltage limiting type: SPD 1 not ignited
Figure A.6 - Current and voltage characteristics at a
combination of a SPD voltage switching type and
a SPD voltage limiting type: SPD 1 ignited
Figure A.7a - Circuit diagram
Figure A.7b - Current/voltage/energy characteristics for
LDE = 8 muH: No energy coordination -
10/350 mus
Figure A.7c - Current/voltage/energy characteristics for
LDE = 10muH: Energy coordination - 10/350 mus
Figure A.7 - Example of energy coordination between voltage
switching type SPD 1 and voltage limiting type
SPD 2 for 10/350 mus
Figure A.8a - Circuit diagram
Figure A.8b - Current/voltage/energy characteristics for
LDE = 10muH: No energy coordination -
0,1 kA/mus
Figure A.8c - Current/voltage/energy characteristics for
LDE = 12muH: Energy coordination - 0,1 kA/mus
Figure A.8 - Example of energy coordination between voltage
switching type SPD 1 and voltage limiting type
SPD 2 for 0,1 kA/mus
Figure B.1 - Basic model for the lightning current
distribution
Figure B.2 - Circuit diagram of the basic model for the
lightning current distribution
Figure B.3 - Lightning current distribution through the
system dependent on the length of the cable
(see Figure B.2)
Figure B.4 - Current distribution at cable length of 500 m
(see Figure B.2)
Figure B.5 - Current distribution at cable length of 50 m
(see Figure B.2)
Figure B.6 - Current distribution at different earthing
impedances (transformer) Cable length: 100 m
(see Figure B.2)
Figure B.7 - Model for lightning current distribution in the
case of parallel consumers
Figure B.8 - Current distribution in the case of one parallel
building (see Figure B.7)
Figure B.9 - Simplified calculation of partial lightning
current into the power distribution system
Figure B.10 - Model for the lightning current distribution
(see also Figure B.11)
Figure B.11 - Simplified equivalent circuit (see also Figure
B.10)
Figure C.1 - Test circuit for simulation SPD and different
loads connected by cables with different lengths
Figure C.2 - Voltage at SPD and load (1 m length of cable;
see Figure C.1)
Figure C.3 - Voltage at SPD and load (10 m length of cable;
see Figure C.1)
Figure C.4 - Voltage at SPD and load (100 m length of cable;
see Figure C.1)
Table 1 - Lightning current parameters of the first stroke