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Figure 9.3.4 Protection of a fermenter by means of air-termination Figure 9.8.1 Modular public address system with surge protective
masts, isolated by means of a HVI Conductor devices . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
(Part No. 819 720) . . . . . . . . . . . . . . . . . . . . . 277 Figure 9.8.2 Horn loudspeaker installed on a structure without
Figure 9.3.5 Protection of a fermenter by means of air-termination external lightning protection system . . . . . . . . . . . . 306
masts, isolated by means of two HVI Conductors Figure 9.8.3 Horn loudspeaker located in the protected volume of
(Part No. 819 750) . . . . . . . . . . . . . . . . . . . . . 277 an air-termination system on a structure with external
Figure 9.3.6 Fermenter made of bolted metal sheets . . . . . . . . . . 278 lightning protection system. . . . . . . . . . . . . . . . . 306
Figure 9.3.7 Protection of a fermenter made of metal sheets by means Figure 9.9.1 Lightning and surge protection for a burglar alarm
of an isolated air-termination system (source: Büro für system with pulse polling technology . . . . . . . . . . . 309
Technik, Hösbach) . . . . . . . . . . . . . . . . . . . . . 278 Figure 9.9.2 Lightning and surge protection for a fire alarm system
Figure 9.3.8 Welded steel container (source: Eisenbau Heilbronn GmbH) 278 with analogue ring technology . . . . . . . . . . . . . . . 310
Figure 9.3.9 Intermeshed earth-termination system for a biogas plant . 279 Figure 9.9.3 Lightning and surge protection for a burglar alarm system
Figure 9.3.10 Excerpt from the block diagram of a biogas plant . . . . . 281 with d.c. circuit technology. . . . . . . . . . . . . . . . . 310
Figure 9.3.11 Surge protection for the installations of information Figure 9.10.1 KNX bus topology with maximum number of bus devices
technology systems. . . . . . . . . . . . . . . . . . . . . 282 per line, maximum number of lines per main line and
Figure 9.3.12 Combined arrester modules with LifeCheck . . . . . . . . 283 maximum number of main lines per area line . . . . . . . 313
Figure 9.3.13 DEHNpipe surge arrester for outdoor use is screwed onto Figure 9.10.2 Induction loop formed by two KNX bus devices supplied
with low voltage . . . . . . . . . . . . . . . . . . . . . . 314
two-conductor field devices . . . . . . . . . . . . . . . . 283
Figure 9.4.1 Schematic diagram of a sewage plant . . . . . . . . . . . 285 Figure 9.10.3 Induction loop formed by one KNX bus device installed
at a metal construction or pipe. . . . . . . . . . . . . . . 314
Figure 9.4.2 Division of the operations building into lightning Figure 9.10.4 Lightning equipotential bonding at the entrance point of
protection zones; example: selection of surge protective the KNX bus cable into the building and surge protective
devices for the oxygen measurement device . . . . . . . . 286 devices installed at the distribution board of the KNX
Figure 9.4.3 Protective angle method according to IEC 62305-3 system and at the actuator of the heater. . . . . . . . . . 314
(EN 62305-3) . . . . . . . . . . . . . . . . . . . . . . . . 287 Figure 9.10.5 Lightning equipotential bonding is not required for the
Figure 9.4.4 Lightning equipotential bonding according to KNX cable due to zone expansion . . . . . . . . . . . . . 315
DIN EN 62305-3 (VDE 0185-305-3), Supplement 1. . . . . 288
Figure 9.4.5 DEHNventil installed in a switchgear cabinet for protecting Figure 9.10.6 Lightning current arresters installed in the main power
supply system and surge arresters installed at the
the power supply systems . . . . . . . . . . . . . . . . . 289 distribution board of the KNX system . . . . . . . . . . . 315
Figure 9.4.6 DEHNconnect terminal blocks with integrated surge Figure 9.10.7 Surge protective devices installed at the main distribution
protection for protecting the complete measuring and board and at the distribution board of the KNX system . . 316
control equipment . . . . . . . . . . . . . . . . . . . . . 289
Figure 9.11.1 Shield connection on both ends – Shielding from
Figure 9.4.7 DEHNconnect surge protection devices; lines entering capacitive / inductive coupling and direct and indirect
from the double floor. . . . . . . . . . . . . . . . . . . . 289 shield earthing to prevent equalising currents . . . . . . . 320
Figure 9.5.1 Permitted earth electrodes . . . . . . . . . . . . . . . . . 291 Figure 9.11.2 Equipotential bonding of a shielded cable system . . . . . 320
Figure 9.5.2 Protective equipotential bonding of the cable network Figure 9.11.3 NET Protector - Universal surge protective device for
and the devices. . . . . . . . . . . . . . . . . . . . . . . 292 protecting the data lines of a floor distributor (also suited
Figure 9.5.3 Antenna system with equipotential bonding at the lowest for class D networks) . . . . . . . . . . . . . . . . . . . . 321
point of the installation and surge protective devices . . . 292 Figure 9.11.4 DEHNprotector - Universal surge protective device for
Figure 9.5.4 Arrangement of antennas which do not have to be protecting the network and data lines of a work station. . 321
earthed . . . . . . . . . . . . . . . . . . . . . . . . . . . 293 Figure 9.11.5 Administration building with highly available installation
Figure 9.5.5 Antenna system located in the protected volume of an parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
existing air-termination system. . . . . . . . . . . . . . . 293 Figure 9.12.1 System example for an M-bus . . . . . . . . . . . . . . . 325
Figure 9.5.6 Antenna system with an air-termination rod isolated by Figure 9.12.2 Protection concept for an M-bus system in buildings with
DEHNiso spacers (insulating clearance made of glass- external lightning protection system . . . . . . . . . . . . 327
fibre reinforced plastic (GRP)) . . . . . . . . . . . . . . . 293
Figure 9.5.7 Antenna system with high-voltage-resistant, insulated Figure 9.12.3 Protection concept for an M-bus system in buildings
without external lightning protection system . . . . . . . 328
down conductor DEHNcon-H . . . . . . . . . . . . . . . . 293
Figure 9.5.8 Antenna system with surge protective devices . . . . . . . 294 Figure 9.13.1 PROFIBUS FMS or DP extending beyond a building with
external lightning protection system . . . . . . . . . . . . 331
Figure 9.5.9 Antenna system with high-voltage-resistant down con- Figure 9.13.2 Intrinsically safe PROFIBUS PA in a building with external
ductor DEHNcon-H and surge protective devices. . . . . . 294 lightning protection system. . . . . . . . . . . . . . . . . 331
Figure 9.5.10 Broadband cable connection with surge protective devices .295 Figure 9.14.1 Lightning and surge protection for an analogue
Figure 9.6.1 Surge protective devices for an agricultural building . . . . 297 connection with ADSL . . . . . . . . . . . . . . . . . . . 335
Figure 9.6.2 Surge protective devices for bus systems and the telephone 298 Figure 9.14.2 Lightning and surge protection for an ISDN connection
Figure 9.7.1 Camera connected to a building with external lightning with ADSL . . . . . . . . . . . . . . . . . . . . . . . . . 335
protection system and lightning current carrying surge Figure 9.14.3 Surge protection for telecommunication systems with
protective devices on both ends . . . . . . . . . . . . . . 301 “ISDN primary multiplex connection” . . . . . . . . . . . 336
Figure 9.7.2 Camera connected to a building without external light- Figure 9.15.1 Surge arrester installed in the terminal compartment /
ning protection system with surge protective devices distributor of the metal mast for protecting the metal
on both ends . . . . . . . . . . . . . . . . . . . . . . . . 301 LED mast light from conducted surges caused by distant
Figure 9.7.3 IP camera with surge protective devices on both ends . . . 302 atmospheric events and switching operations . . . . . . . 339

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