Page 227 - 35_DS702_E_2014_Lightning_Protection_Guide

L1 L2 L3 NPE
type 3 surge arrester type 3 surge arrester type 3 surge arrester
25 A also possible without 25 A
NF 10 mains filter
3 A 10 A
3
4
L1 L2 L3 N
L L N N
IN
/ IN function
DEHN SPD DR M 2P 255 FM DEHNrail MAINS FILTER
SPS PRO
PLC
PLC electronic switchgear cabinet / machine
DEHNrail DR M 4P 255 FM device
OUT / FM OUT
L’ L’ N’ N’
fault indication L1 L2 L3 N
1
2
1 x SPS PRO Part No. 912 253 1 x DR M 2P 255 FM Part No. 953 205 1 x DR M 4P 255 FM Part No. 953 405
1 x NF 10 Part No. 912 254 alt. 1 x DR M 4P 255 Part No. 953 400
cable length ≥ 5 m
32 A
125 A
sub-distribution board
L1 L2 L3
V NH V NH V NH
V NH00 280 V NH00 280 V NH00 280
DEHNguard DG MOD 275 DEHNguard DG MOD 275 DEHNguard DG MOD 275
PEN
3 x V NH00 280 Part No. 900 261 1 x DG M TNC 275 Part No. 952 300
or with remote signalling contact:
1 x DG M TNC 275 FM Part No. 952 305
type 2 surge arrester type 2 surge arrester

DEHNbloc ® M DEHNventil ®
Coordinated with DEHNguard ® Directly coordinated with
without additional cable length. type 2 and 3 Red/Line arresters
without additional cable length.

coordinated type 1 coordinated type 1 type 1
lightning current arrester lightning current arrester combined arrester

315 A 315 A 315 A

L/N L/N L/N L1 L1‘ L2 L2‘ L3 L3‘

DEHNbloc Maxi DEHNbloc Maxi DEHNbloc Maxi
DBM NH00 255 DBM NH00 255 DBM NH00 255 main distribution board
DEHNbloc DB M 1 255 FM DEHNbloc DB M 1 255 FM DEHNbloc DB M 1 255 FM DEHNventil DV MOD 255 DEHNventil DV MOD 255 DEHNventil DV MOD 255
fault indication
N/PE(N) N/PE(N) N/PE(N) PEN fault indication

3 x DBM NH00 255 Part No. 900 255 3 x DB M 1 255 FM Part No. 961 125 1 x DV M TNC 255 FM Part No. 951 305
1 x MVS 1 6 Part No. 900 815
MEB alt. 3 x DB M 1 255 Part No. 961 120 alt. 1 x DV M TNC 255 Part No. 951 300
1 x MVS 1 6 Part No. 900 815
Only required, if no fuse of the same or a lower nominal value is provided in the upstream system.
L1 L2 L3 PEN No separate backup fuse, inherently earth-fault and short-circuit-proof installation.
Figure 8.1.3.9 SPDs used in a TN system – Industrial building with separation of the PEN conductor in the sub-distribution board

226 LIGHTNING PROTECTION GUIDE www.dehn-international.com