Page 6 - dehn-protects-the-railway-infrastructure

Protection of level crossing safety systems Selection guide: Protection of level crossing safety systems

Level crossings are now, more than ever, neuralgic points With its wide product portfolio for lightning and surge Application Type Part No.
whose protection requires maximum reliability. Level cross- protection, DEHN has the optimum prerequisites for creat-
ings systems ensure that intersections where a railway line ing bespoke solutions for level crossings. To ensure that Protection of the power supply 400/230 V, 50 + 16,7 Hz
crosses a road or path at the same level are safe. Modern these systems also function reliably during thunderstorms Three-phase type 1+2+3 DEHNventil ® DV M TT 255 FM 951 315
level crossing systems can either be integrated in an inter- DEHN, in cooperation with manufacturers of level crossing Single-phase type 1+2+3 DV M TT 2P 255 FM 951 115
locking or function autonomously. Nowadays, they are safety systems and the DB Netz AG, has developed a spe-
equipped with fully electronic high-performance control cial protection concept which offers you the following
technology and are, therefore, particularly vulnerable to benefits: Three-phase type 2 DEHNguard ® DG M TT 275 FM 952 315
disturbances such as direct lightning or surges. As level • Approved by the Federal Railway Authority Single-phase type 2 DG M TT 2P 275 FM 952 115
crossings cover a wide area, the peripheral elements are (Eisenbahn-Bundesamt)
often a considerable distance away from the switching • Laboratory-tested protection solutions Protection of the DC voltage level supplied via charging rectifiers
house. Field impulses triggered by lightning strikes can ®
generate induction voltage in conductor loops and switch- • Personal protection due to maximum safety 24 V DC / 18 V DC BLITZDUCTOR XT BXT ML4 BD 24 920 344
36 V DC
BXT ML4 BE 36
920 336
ing circuits which far exceeds the insulation strength of the • Maximum system availability 60 V DC BXT ML4 BD 60 920 346
electronic/electric devices in use. • Remote signalling of arresters to be replaced Base part for BLITZDUCTOR ® XT BXT BAS 920 300
• Device and component protection
Protection of status monitoring
• Space-saving protection elements Condition monitoring of up to 10 BXTs DEHNrecord DRC MCM XT 910 695

Permanent interference voltage – link
MOV arrester, UC 275 V AC DEHNguard ® DG S 275 FM 952 090
GDT arrester, UC 255 V AC DEHNgap DGP C S FM 952 035

Earthing
Components for earthing level crossing Earth rod StSt V4A TE 20 1500 AZ V4A 620 902
safety systems Voltage-limiting device SDS 1 923 110
Mast adapter MA SDS M12 723 199

10 11