DEHNventil® modular

Modular multipole Combined Lightning Current and Surge Arrester

Prewired spark-gap-based type 1 and type 2 combined lightning current and surge arrester consisting of a base part and plug-in protection modules Maximum system availability due to RADAX Flow follow current limitation No tripping of 20 A gL/gG fuses up to short-circuit currents of 50 kArms Discharge capacity up to 100 kA (10/350 µs) Capable of protecting terminal equipment 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 Vibration and shock-tested according to EN 60068-2

Version

DEHNventil M TNC 255: Modular combined lightning current and surge arrester for use in TN-C systems

DEHNventil M TNS 255: Modular combined lightning current and surge arrester for use in TN-S systems

DEHNventil M TT 255: Modular combined lightning current and surge arrester for use in TT and TN-S systems ("3+1" circuit)

DEHNventil M TN 255: Modular combined lightning current and surge arrester for use in single-phase TN systems

DEHNventil M TT 2P 255: Modular combined lightning current and surge arrester for use in single-phase TT and TN systems ("1+1" circuit)

DEHNventil M ... FM: With remote signalling contact for monitoring device (floating changeover contact)

Details

With their functional Red/Line design, the devices of the modular DEHNventil family provide a combination of safety and innovation. Designed for "all-in-one installation", the arresters integrate lightning equipotential bonding and surge protection in a single device, making them ideal for use in compact electrical installations. The energy-coordinated arresters even allow to protect terminal equipment if the distance between DEHNventil and the loads is ≤ 5 m. With a lightning current discharge capacity up to 100,000 A, the arresters ensure a high degree of availability of the electrical installation to be protected. Even in large-scale electrical installations, the modular DEHNventil arresters provide various application benefits. The Red/Line surge arresters installed at the boundaries of the individual lightning protection zones, for example, are already energy-coordinated with the DEHNventil arresters. DEHNventil arresters can be easily integrated into switchgear installations or distribution boards due to their encapsulated creepage discharge spark gaps and compact dimensions. A special feature of the modular DEHNventil family is its functional design, in particular the module locking system. It fixes the protection module firmly in place so that it is safely connected to the base part even with maximum loads. Protection modules can be easily replaced without tools by pressing the module release button and removing the protection module. By using the double terminals suitable for all conductors, the arresters can be connected in series in a space-saving and cost-effective way according to IEC 60364-5-53 requirements for nominal currents up to 125 A. Busbars of type MVS 3 8 6 and MVS 4 11 8 can be used for connecting further DIN rail mounted devices. The type designation of DEHNventil arresters allows to easily choose the right arrester for the relevant system configuration of the low-voltage consumer’s installation.

The patented RADAX Flow technology ensures follow current limitation and extinction as well as maximum system availability of the electrical consumer's installation to be protected. Even in case of short-circuit currents as high as 100 kArms, mains follow currents are reduced in such a way that selectivity with respect to low-value fuses is ensured, meaning that upstream fuses are not tripped by mains follow currents.

The operating state / fault indicator of each protective path needs no power to operate and immediately shows the operating state of the surge arrester. Apart from the standard visual indication with green and red flags, DEHNventil M ... FM devices feature a three-pole remote signalling terminal. With its floating changeover contact, the remote signal can be used as a break or make contact according to the particular circuit concept.

Due to their parameters and design, the devices can be installed even upstream of meter panels in low-voltage consumer's installations.

Specification

Type DV M TNC 255 DV M TNC 255 FM
Part No. 951 300 951 305
SPD according to EN 61643-11 / IEC 61643-11 type 1 + type 2 / class I + class II type 1 + type 2 / class I + class II
Energy coordination with terminal equipment (≤ 5m) type 1 + type 2 + type 3 type 1 + type 2 + type 3
Nominal a.c. voltage (UN) 230 / 400 V (50 / 60 Hz) 230 / 400 V (50 / 60 Hz)
Max. continuous operating a.c. voltage (UC) 264 V (50 / 60 Hz) 264 V (50 / 60 Hz)
Lightning impulse current (10/350 µs) [L1+L2+L3-PEN] (Itotal) 75 kA 75 kA
Specific energy [L1+L2+L3-PEN] (W/R) 1.40 MJ/ohms 1.40 MJ/ohms
Lightning impulse current (10/350 µs) [L-PEN] (Iimp) 25 kA 25 kA
Specific energy [L-PEN] (W/R) 156.25 kJ/ohms 156.25 kJ/ohms
Nominal discharge current (8/20 µs) [L-PEN]/[L1+L2+L3-PEN] (In) 25 / 75 kA 25 / 75 kA
Voltage protection level (UP) ≤ 1.5 kV ≤ 1.5 kV
Follow current extinguishing capability a.c. (Ifi) 50 kArms 50 kArms
Follow current limitation / Selectivity no tripping of a 20 A gL/gG fuse up to 50 kArm no tripping of a 20 A gL/gG fuse up to 50 kArms (prosp.)
Response time (tA) ≤ 100 ns ≤ 100 ns
Max. backup fuse (L) up to IK = 50 kArms 315 A gL/gG 315 A gL/gG
Max. backup fuse (L-L') 125 A gL/gG 125 A gL/gG
Temporary overvoltage (TOV) (UT) – Characteristic 440 V / 120 min. – withstand 440 V / 120 min. – withstand
Operating temperature range [parallel] / [series] (TU) -40 °C ... +80 °C / -40 °C ... +60 °C -40 °C ... +80 °C / -40 °C ... +60 °C
Operating state / fault indication green / red green / red
Number of ports 1 1
Cross-sectional area (L1, L1', L2, L2', L3, L3', PEN, 9) (min.) 10 mm2 solid / flexible 10 mm2 solid / flexible
Cross-sectional area (L1, L2, L3, PEN) (max.) 50 mm2 stranded / 35 mm2 flexible 50 mm2 stranded / 35 mm2 flexible
Cross-sectional area (L1', L2', L3', 9) (max.) 35 mm2 stranded / 25 mm2 flexible 35 mm2 stranded / 25 mm2 flexible
For mounting on 35 mm DIN rails acc. to EN 60715 35 mm DIN rails acc. to EN 60715
Enclosure material thermoplastic, red, UL 94 V-0 thermoplastic, red, UL 94 V-0
Place of installation indoor installation indoor installation
Degree of protection IP 20 IP 20
Capacity 6 module(s), DIN 43880 6 module(s), DIN 43880
Approvals KEMA, VDE, UL, VdS KEMA, VDE, UL, VdS
Type of remote signalling contact   changeover contact
a.c. switching capacity   250 V / 0.5 A
d.c. switching capacity   250 V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A
Cross-sectional area for remote signalling terminals   max. 1.5 mm2 solid / flexible
Extended technical data: Use in switchgear installations with prospective short-circuit currents of more than 50 kA Use in switchgear installations with prospective short-circuit currents of more than 50 kArms (tested by the German VDE)
– Maximum prospective short-circuit current 100 kArms (220 kApeak) 100 kArms (220 kApeak)
– Limitation / Extinction of mains follow currents up to 100 kArms (220 kApeak) up to 100 kArms (220 kApeak)
– Max. backup fuse (L) up to IK = 100 kArms 315 A gL/gG 315 A gL/gG
Weight 970 g 962 g
GTIN 4013364108134 4013364108141
PU 1 pc(s) 1 pc(s)
Product Specifications (PDF) Product Specifications (PDF)