Page 289 - 35_DS702_E_2014_Lightning_Protection_Guide

MEB

DNO

Telecontrol /
telecommunication

Ex i Measuring and control equipment

PROFI
BUS

heater

gas

foundation earth electrode external LPS

No. in Fig. Protection for Surge protective device *floating remote signalling contact Part No.
Power supply systems
DEHNventil DV M TNC 255 951 300
TN-C system DEHNventil DV M TNC 255 FM* 951 305
DEHNventil DV ZP TNC 255 900 390
DEHNventil DV M TT 255 951 310
TN-S/TT system DEHNventil DV M TT 255 FM* 951 315
DEHNventil DV ZP TT 255 900 391
Information technology systems
BLITZDUCTOR BXT ML2 BD 180 or 920 247
Telecontrol, telecommunication BLITZDUCTOR BXT ML4 BD 180 920 347
+ BXT BAS base part + 920 300
Measuring and control equipment
BLITZDUCTOR BXT ML2 BD S EX 24 or 920 280
Intrinsically safe measuring circuits BLITZDUCTOR BXT ML4 BD EX 24 920 381
+ systems
+ BXT BAS base part + 920 301
Bus systems
BLITZDUCTOR BXT ML2 BD HFS 5 920 271
e.g. Profibus DP
+ BXT BAS base part + 920 300
Figure 9.4.4 Lightning equipotential bonding according to DIN EN 62305-3 (VDE 0185-305-3), Supplement 1

288 LIGHTNING PROTECTION GUIDE www.dehn-international.com