Long connection cables, which cause inductive voltage drops in switchgear cabinets, often pose a challenge for installers. DEHN solves this problem with an innovative advancement of its proven connection technologies. With the new double screw technology in the Type 2 + 3 surge protective device series DEHNguard MD, the company is once again confirming its pioneering role. This technology complements the existing screw and push-in connection terminal and enables the wiring of different types of conductors. The feed-through wiring option also offers even greater flexibility in terms of electromagnetic compatibility (EMC) for applications with a nominal current of up to 63 A.
Yet more innovation: DEHN opts for new double screw technology for surge protective devices
Push-in technology has proven itself in many areas thanks to its tool-free, fast and secure wiring – especially in residential construction with smaller cross-sections of connection cables. With the new double screw technology, DEHN is now going one step further. Two terminals per pole enable continuous wiring ('V-connection') without additional pin-shaped terminals. The technology allows the use of conductors with a larger cross-section – for two through cables up to 16 mm² each or as a stub line up to 35 mm². This makes it a robust connection that remains permanently stable even under vibration or mechanical stress such as temperature fluctuations.
The DEHNguard MD series with double screw technology is particularly advantageous for EMC-compliant wiring in accordance with DIN VDE 0100-534 / IEC 60364-5-53, as there are no high, inductive voltage drops generated across the connection cables. Optional feed-through wiring saves on components and ensures that maximum cable lengths comply with standards. This makes it easier to integrate into existing systems – a huge advantage when retrofitting.
The DEHNguard MD has also proven itself in power distribution and switchgear cabinet building, as it meets strict requirements for current-carrying capacity and safety. Areas such as building automation and critical infrastructure also benefit from integrated double screw technology, as it enables durable and low-maintenance connections. In building technology, a supply cable with a cross-section of 16 mm² can now also be easily connected to the device using feed-through wiring.
A floating remote signalling contact reliably indicates the status. Defective protection modules in the DEHNguard MD series can be quickly replaced during operation without having to disconnect the wiring.
You can find the technical details here.
Simon Thaler ⎟ Head of Corporate Communications
Daily and Business Press