Page 232 - 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
indication of interference
DEHN SPD DR M 2P 255 FM DEHNrail MAINS FILTER
SPS PRO
PLC PLC electronic switchgear cabinet / machine
OUT / FM OUT DEHNrail DR M 4P 255 FM device
L’ L’ N’ N’
1
2
cable length ≥ 5 m L1 L2 L3 N
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
32 A
RCD
125 A 125 A
L1 L2 L3 N L1 L2 L3 N
DEHNguard DG MOD 275 DEHNguard DG MOD 275 DEHNguard DG MOD 275 DEHNguard DG MOD NPE DEHNguard DG MOD 275 DEHNguard DG MOD 275 DEHNguard DG MOD 275 DEHNguard DG MOD NPE sub-distribution board
fault indication
PE PE

with remote signalling contact:
1 x DG M TT 275 Part No. 952 310 1 x DG M TT 275 FM Part No. 952 315
type 2 surge arrester type 2 surge arrester

DEHNbloc ® M DEHNventil ®
cable length ≥ 15 m Coordinated with DEHNguard ® Directly coordinated with
without additional cable length. type 2 and 3 Red/Line arresters
without additional cable length.

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

main distribution board
315 A 315 A
L/N L’/N’ L/N L’/N’ L/N L’/N’ PE L/N L/N L/N PE L1 L1‘ L2 L2‘ L3 L3‘ N N‘

DEHNbloc DB H MOD 255 DEHNbloc DB H MOD 255 DEHNbloc DB H MOD 255 DEHNgap DGPH MOD 255 DEHNbloc DB M 1 255 FM DEHNbloc DB M 1 255 FM DEHNbloc DB M 1 255 FM DEHNgap DGP M 255 FM DEHNventil DV MOD 255 DEHNventil DV MOD 255 DEHNventil DV MOD 255 DEHNventil DV MOD NPE 50
fault indication
N/PE(N) N/PE(N) N/PE(N) N N/PE(N) N/PE(N) N/PE(N) N PE

fault indication
3 x DBH M 1 255 Part No. 961 122 3 x DB M 1 255 FM Part No. 961 125 1 x DV M TT 255 FM Part No. 951 315
MEB 1 x DGPH M 255 Part No. 961 102 1 x DGP M 255 FM Part No. 961 105
1 x MVS 1 8 Part No. 900 611 1 x MVS 1 8 Part No. 900 611 alt. 1 x DV M TT 255 Part No. 951 310
L1 L2 L3 N Only required, if no fuse of the same or a lower nominal value is provided in the upstream system.
Figure 8.1.4.5 SPDs used in a TT system – Industrial building

www.dehn-international.com LIGHTNING PROTECTION GUIDE 231