LIGHTNING & SURGE PROTECTION
In an era of increasing reliance on sensitive electronic equipment, protecting your infrastructure from the catastrophic effects of lightning strikes and transient overvoltages is a critical necessity. At Demesne Electrical, we provide a comprehensive range of lightning and surge protection solutions designed to safeguard industrial, commercial, and residential installations across Ireland.
Our primary partnership with DEHN, a global leader in lightning protection and earthing technology, allows us to offer world-class devices that comply with the highest international safety standards, including IEC 62305 and EN 61643. Whether you are protecting a large-scale industrial plant or a modular control cabinet, our stock includes everything from high-capacity Type 1 lightning arresters to precision Type 3 surge protection for terminal equipment.
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DEHNventil Type 1,2 & 3 Combined Lightning Current and Surge Arresters
- Combined Type 1, 2 & 3 protection Complete lightning and surge protection in a single coordinated device.
- Very high lightning current discharge capacity Designed for installations exposed to direct lightning strikes.
- Outstanding follow current limitation Prevents nuisance tripping and maintains system availability.
- Suitable for high prospective short-circuit currents Ideal for service entrances and demanding network conditions.
DEHNrail Type 3 Surge Arresters
- High discharge capacity due to heavy-duty zinc oxide varistor / spark gap combination
- DEHNrail 2-Pole and 4-pole Modular devices.
- Operating state / fault indication by green / red indicator flag in the inspection window
- Dedicated Type 3 protection Final-stage surge protection for sensitive terminal equipment.
- Compact DIN rail mounting Ideal for control panels, cabinets, and distribution boards.
DEHNventil Type 1,2 and 3 Combined Lightning Current and Surge Arresters with integrated backup fuse
- Integrated backup fuse
- High lightning current capacity Handles up to 25 kA (10/350 µs), suitable for high-exposure installations.
- Low protection level Up ≤ 1.5 kV, including the backup fuse, helping protect downstream terminal equipment.
DEHNshield Type 1,2 and 3 Combined Lightning Current and Surge Arresters
- All-in-one Type 1, 2 & 3 protection
- High lightning current discharge capability Suitable for installations exposed to direct lightning currents.
- Maximum system availability Advanced follow current limitation minimises nuisance tripping and downtime.
- Energy coordination built in Designed to work seamlessly with other DEHN surge protection devices.
DEHNguard Type 2 and 3 Surge Arresters
- Type 2 & Type 3 surge protection Ideal for protection against induced surges and switching overvoltages.
- Low protection levels Reduces stress on downstream equipment and extends service life.
- Fast response characteristics Effective protection for sensitive electronic and control systems.
DEHNguard Type 2 and 3 Surge Arresters with integrated backup fuse
- Integrated backup fuse Eliminates the need for an external fuse, reducing components and wiring.
- Space-saving design Ideal for compact LV distribution boards and control panels.
- Type 2 & Type 3 surge protection Protects against switching surges and transient overvoltages.
DEHNrapid Type 1 Surge Arresters for Telecommunications
- Type 1 surge protection for telecom lines Designed to handle direct lightning currents on communication systems.
- High lightning current discharge capacity Suitable for exposed installations and outdoor line entry points. Protection of critical communication infrastructure
- Fast response characteristics Effective protection for sensitive data and signal circuits.
- Energy-coordinated protection Works alongside downstream Type 2 and Type 3 telecom arresters.
BLITZDUCTOR XT – Protection Modules
- Protection for signal and data lines Designed specifically for measurement, control, and communication circuits.
- Low protection levels Safeguards sensitive electronics while maintaining signal quality. Modular, space-saving design
- Fast response times Effective against fast transient overvoltages.
- High system availability Reduces the risk of downtime and equipment failure.
DEHNpatch – Arrester for Data Networks and Ethernet Applications
- Protection for Ethernet and data networks Designed specifically for LAN and structured cabling systems.
- Supports high-speed data transmission Maintains signal integrity for modern Ethernet applications.
- Suitable for PoE systems Protects devices powered over Ethernet without affecting performance.
- Compact, inline design Easy installation within patch panels and network cabinets.
DEHN Surge & Lightning Protection Ireland – DEHNventil Red/Line Series
Electrical surges caused by lightning strikes, grid switching, or nearby equipment can destroy sensitive electronics in milliseconds. DEHN's surge protection devices (SPDs) are specified by electrical engineers and installers across Ireland to protect control panels, building management systems, and critical infrastructure from transient overvoltage damage.
DEHN DEHNventil M2 – Key Features
Multipole surge protection covers all live conductors simultaneously
Lightning current and surge protection in a single compact device
Reduced installation space vs. single-pole alternatives
Remote signalling contact for building management system integration
Suitable for TN-C-S, TN-S, TT, and IT network configurations
IEC 61643-11 certified
Where to Specify DEHN SPDs in Ireland
Main distribution boards (MDB) at point of grid entry
Sub-distribution boards feeding sensitive electronics
Industrial control panels with PLC and SCADA equipment
Renewable energy installations (wind, solar, battery storage)
Data centres and server rooms
Agricultural buildings with exposed overhead supplies
Consolidation Note: Dehn Surge vs Dehn Lightning KWs
Both 'Dehn surge protection' and 'Dehn lightning protection' target the same page. Use H1 for the primary keyword 'DEHN Surge & Lightning Protection Ireland' and target both terms via H2/H3 structure. DEHNventil covers both functions in one device make this clear in the content to own both search intents.
Frequently asked questions about LIGHTNING & SURGE PROTECTION
What is a surge protection device (SPD)?
A surge protection device (SPD) is an electrical component installed in a distribution board to divert transient overvoltage caused by lightning, switching, or grid faults safely to earth, protecting downstream equipment from damage.
Is surge protection required by Irish electrical standards?
IS 10101:2020 (IEC 60364-5-53) recommends SPDs in many installation types, and SPDs are mandatory in certain scenarios particularly where lightning protection is installed, or where the consequences of equipment damage are significant. An electrician should assess each installation.
What is the difference between Type 1, Type 2, and Type 3 SPDs?
Type 1 SPDs (like DEHN Red/Line DEHNventil) handle direct lightning current and are installed at the main incoming distribution board. Type 2 handles switching surges at sub-boards. Type 3 provides fine protection at point of use for sensitive equipment.
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