Page 434 - 35_DS702_E_2014_Lightning_Protection_Guide

The main functions of safety lighting systems are the designa- These systems feature the following interfaces:
tion and lighting of escape routes, lighting of work stations ¨ Power supply system;
with a special risk until work is safely finished and lighting to ¨ Battery cabinet;
prevent panic.
¨ Circuit switching elements which, in combination with the
In the following, surge protective devices for central power system-specific electronic ballasts of the luminaires, ensure
supply systems (CPS) (central battery systems) are described. continuous / standby operation (individually assigned) and
a switched permanent light in the circuit. These elements
allow to perform the required test and to monitor the in-
dividual lighting systems. Moreover, they incorporate the
continuous / standby circuits required overcurrent protective devices which protect the
LAN 230 V a.c. / 216 V d.c.
circuit;
bus sub-station RS 485 ¨ Bus communication with the central battery system / sub-
remote panels;
indication
¨ LAN;
¨ Remote indication;
¨ Freely programmable inputs and outputs.
bus
LAN In general, a risk analysis must be performed to determine
circuit switching whether surge protective devices (SPDs) must be installed for
elements the interfaces. To protect the central battery system (e.g.) al-
most without risk, surge protective devices are required for all
interfaces listed above (Figure 9.31.1). In Figures 9.31.1 to
power supply
9.31.4 the SPDs, which are normally required to protect the
interfaces, are represented with a solid line. Surge protective
battery supply devices which are installed following a risk analysis are dotted.

3 x 320/400 V system
battery cabinet

No. Surge protective device Part No.
BLITZDUCTOR BXT ML4 BE 24 * 920 324
+ BXT BAS base part 920 300
DEHNpatch DPA M CLE RJ45B 48 929 121
DEHNguard DG M TN 275 952 200
CB
CB
BLITZDUCTOR BXT ML2 BD HFS 5 * 920 271
+ BXT BAS base part 920 300
DEHNguard DG M TN 275 952 200
DEHNguard M TNS 275 * 952 400
DEHNguard M TT 275 * 952 310 No. Surge protective device Part No.
* Observe individual interfaces / system configurations DEHNsecure DSE M 1 242 (2 x) 971 122
MVS 1 3 busbar 900 615
Figure 9.31.1 Central battery system, feeder cable, battery cabinet
feeder cable, bus line, remote indication line, LAN line Figure 9.31.2 Lightning equipotential bonding for the circuits of the
as well as continuous / standby circuit lines in LPZ 1 safety lighting system at the zone transition from the
and in the same fire compartment building to the ground

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