Page 110 - Surge-Protection-E_0.pdf

Surge Arresters – Type 3

DEHNrail modular, multipole
• Four-pole surge arrester consisting of a base part and a plug-in
protection module
• High discharge capacity due to heavy-duty zinc oxide
varistor / spark gap combination
• Energy coordination with other arresters of the Red/Line
product family
• Operating state / fault indication by green / red indicator
flag in the inspection window
• Easy replacement of protection modules without tools due
to module locking system with module release button
• Nominal load currents up to 25 A
• Vibration and shock-tested in accordance with EN 60068-2

For protecting the power supply circuits of industrial electronics equipment against DEHNrail M 4P ...: Four-pole surge arrester consisting of a base
transients in switchgear cabinets. For installation in conformity with the lightning part and a plug-in protection module
protection zone concept at the boundaries from 1 – 2 and higher.
DEHNrail M 4P ... FM: With remote signalling contact for monitoring
device (floating changeover contact)

The modular four-pole DEHNrail M 4P ... (FM) surge arresters are specifi- In the event of the protective cir-
cally developed for protecting three-phase industrial electronics terminal cuit, which is rated for high load
equipment. Adapted to this kind of environment, the arresters with the currents up to 25 A, being over-
Red/Line design are suitable for 35 mm DIN rails. The low voltage protec- loaded, the protection modules
tion level and the comprehensive common and differential mode protec- can be easily replaced without
tion are characteristic of DEHNrail M 4P ... (FM). To provide optimal low tools by simply pressing the mod-
voltage protection levels for the terminal equipment to be protected, the ule release button.
device features input and output terminals for series connection. DEHNrail Apart from the standard visual in-
M 4P ... (FM) devices ideally adapt to the cable run upstream of the ter- dication with green and red indica-
minal equipment. Therefore, no additional terminal blocks for outgoing tor flags, DEHNrail M 4P ... FM
cables are required. The compact design incorporates the tried and tested devices feature a three-pole re-
disconnector. It disconnects an overloaded arrester circuit without inter- mote signalling terminal. As the
rupting the supply circuit. remote signalling contact is de-
The base part and protection module are coded to guard against installing signed as a floating changeover
the incorrect module. contact, the remote signal can,
The unique module locking system of the DEHNrail M family fixes the depending on the circuit concept,
protection modules to the base part. Neither vibrations during transport be used as a make or break con-
nor the electrodynamic forces of discharge can loosen the connection. tact.

953 400 DR M 4P 255
953 405 DR M 4P 255 FM DEHN rail M 4P ... (FM)
Four-pole surge arrester consisting of a base part and a plug-in protection module for 230 / 400 V systems;
953 400 4013364115767 04 01 03 01 147 g
170,90 € FM version with floating remote signalling contact.
953 405 4013364115774 04 01 03 01 151 g
184,10 €
Type DR M 4P ... 255 255 FM
Part No. 953 400 953 405
SPD according to EN 61643-11 / IEC 61643-11 type 3 / class III type 3 / class III
Max. continuous operating voltage (a.c.) (UC) 255 / 440 V (50 / 60 Hz) 255 / 440 V (50 / 60 Hz)
Nominal discharge current (8/20 µs) (In) 3 kA 3 kA
Total discharge current (8/20 µs) [L1+L2+L3+N-PE] (Itotal) 8 kA 8 kA
Voltage protection level [L-N] / [L/N-PE] (UP) ≤ 1000 / ≤ 1500 V ≤ 1000 / ≤ 1500 V
Max. mains-side overcurrent protection 25 A gG or B 25 A 25 A gG or B 25 A
Approvals KEMA, VDE KEMA, VDE
Type of remote signalling contact — changeover contact
Surge Arresters – Type 3 953 406 953 406 4013364353060 04 01 03 01 151 g DEHNrail M 4P SN1872 FM
DR M 4P 255 SN1872 FM
Four-pole surge arrester consisting of a base part and a plug-in protection module;
with floating remote signalling contact. Can be used in systems with a fusing up to 32 A.
184,10 €
Type DR M 4P ...
Part No. 255 SN1872 FM
953 406
SPD according to EN 61643-11 / IEC 61643-11 type 3 / class III
Max. continuous operating voltage (a.c.) (UC) 255 / 440 V (50 / 60 Hz)
Nominal discharge current (8/20 µs) (In) 3 kA
Total discharge current (8/20 µs) [L1+L2+L3+N-PE] (Itotal) 8 kA
Voltage protection level [L-N] / [L/N-PE] (UP) ≤ 1000 / ≤ 1500 V
Max. mains-side overcurrent protection 32 A gG oder B 32 A
Type of remote signalling contact changeover contact

106 You will find detailed product information on our website Valid as of August 1, 2020