Page 4 - dehn-protects-the-railway-infrastructure

Protection of electronic and digital interlockings Selection guide: Protection of electronic and digital interlockings

Signalling and control systems are the brain and nervous technical locations with the effect of separating energy Application Type Part No.
system of railway transportation systems. As the cables and data. The increased vulnerability to surges is a perma-
run alongside the tracks for many kilometres, they are nent problem here, too. Individual protective measures Protection of the power supply 400/230 V, 50 + 16,7 Hz
particularly susceptible to electromagnetic disturbances. can improve the situation, but do not always lead to the Three-phase type 1+2+3 DEHNventil ® DV M TT 255 FM 951 315
Time and again lightning strikes cause breakdowns in desired results because the planning is rarely comprehen- Single-phase type 1+2+3 DV M TT 2P 255 FM 951 115
the systems controlled by the interlockings – resulting sive.
in tedious delays in the train schedule.
Effective protection of all generations of interlockings is Three-phase type 2 DEHNguard ® DG M TT 275 FM 952 315
Although conventional interlockings with relay technology only possible through the consistent implementation of Single-phase type 2 DG M TT 2P 275 FM 952 115
have a higher insulation and dielectric strength, system a bespoke comprehensive lightning protection zone
failure is not uncommon. An insulation strength of up to concept for the system in question. This must incorporate
5 kV is no obstacle whatsoever, even for small lightning all system components like, e.g., point controls, track re- Supply signal mast boxes DG S 275 VA FM 952 087
flashes. Hence, it is only a question of time when the lease, signalling and control technology, etc. The require- Point mechanisms (4-wire interface) 2 x DG S 275 VA FM
damage will occur. This problem is even more acute for ment for a lightning protection zone concept can also be 60 V consumer 2 x DG S 75 VA FM 952 085
electronic interlockings. Due to the use of electronic com- found in DB-AG-Richtlinie 819.0808 “Blitz- und Über- 1 x DG S 275 FM 952 090
2)
ponents with less dielectric strength, the difference be- spannungsschutz von LST Anlagen” . It makes it possible Permanent interference voltage – link DG S 600 FM 952 096
tween the low dielectric strength of the system and the to plan, execute and monitor protective measures. All as- Protection of data and information technology
influence of impulse voltage from lightning is increasing. pects of external lightning protection, earthing and surge 24 V consumer BLITZDUCTOR XT BXT M2 BD HC5A 24 920 296
®
In plain language, the insulating strength of the system protection are considered holistically and at a cost which is Signal lamps BXT ML4 MY 250 920 389
alone is no longer sufficient. economically justifiable:
DEHN plans and delivers comprehensive protection con- Data bus (e.g. CAN) BXT ML4 BD HF 5 920 371
The large-scale expansion of digital interlockings is intend- cepts tailored to the specific conditions in your interlock- ISDN/DSL/HDSL BXT ML4 BD HF 24 920 375
ed to provide the solution to many future tasks like, e.g. ings – reliably and from a single source. Base part for Blitzductor XT BXT BAS 920 300
securing the transnational migration of the ETCS . A ma- Condition monitoring of up to 10 BXTs DEHNrecord DRC MCM XT 910 695
1)
jor advantage of the IP-based, digital generation of inter- 1) ETCS (European Train Control System)
2) Guideline 819.0808, Lightning and surge protection of control and
lockings is, above all else, the establishment of central signalling installations, issued by the Deutsche Bahn AG
Earthing
Components for earthing of the electronic and Terminal bracket StSt V4A AS S TE 20 7.10 FL40 V4A 620 915
digital interlockings
Earth rod StSt V4A TE 20 1500 AZ V4A 620 902
Fixed earthing terminal EFPM M10 12 V4A L230 478 019
V2A
Equipotential PAS 11AK 563 200
bonding bar

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