DEHNventil ACI
The combined arrester for safe and standard-compliant surge protection without a backup fuse
When work safety meets easy compliance with standards and maximum system availability, it is DEHNventil ACI. Surge protection has never been so simple and safe. The prewired DEHNventil ACI combined arrester (Type 1 + Type 2 + Type 3) provides safety in and at the supply point of the low-voltage switchgear assembly. It means the innovative ACI (Advanced Circuit Interruption) technology is available for the first time in the Type 1 arrester class.
Innovative detailed solutions, such as the automatic disconnection function with visual indication of voltage isolation, 3-sided module replacement options and a never changing cross-sectional area of 16 mm² of copper provide maximum safety and other benefits.
- Max. prospective short-circuit current: 100 kArms (220 kApeak)
- Integrated overcurrent protection
- Response time (tA): ≤ 100 ns
Surge protection at a glance: the DEHNventil ACI in detail.
In practice: how ACI assists in switchgear planning
Industrial switchgear example
Imagine you are responsible for upgrading an industrial distribution system. In a conventional set-up, you must install several SPD modules (Type 1 + 2 surge arresters) next to each other, each with a separate backup fuse.
This not only requires more space and costs more money, but also involves additional wiring and normative testing.
But with DEHNventil ACI, the process looks very different:
- Quick and space-saving set-up: The combination of surge protection and backup fuse in one module eliminates the need for a separate backup fuse, allowing you to install the module at a central location, which saves space in the switchgear cabinet.
- Simple planning: No more additional calculation of fuse sizes or coordination of multiple protection levels. This greatly reduces the work involved in planning.
- Standard-compliant installation: ACI complies with DIN VDE 0100-534 without additional verification, saving you additional time and costs during certification.
Additional advantage for switchgear manufacturers: The elimination of the backup fuse and the reduced space requirements mean that additional compact modules or control-system components can be installed in the same cabinet – without compromising safety.
For maximum system availability:
DEHNventil ACI
DEHN has stood for innovation and technical progress for over 100 years. With the CI and ACI arresters, DEHN has created space-saving solutions for modern surge protection. CI stands for Circuit Interruption and means that an optimally dimensioned fuse is already integrated in the SPD (Surge Protection Device). With the ACI (Advanced Circuit Interruption) technology introduced in 2018, this fuse was replaced by a switch/spark gap combination. These and other innovative features make DEHNventil ACI the simplest and safest solution.
Our arrester classes at a glance:
Relax.
It is a DEHNventil ACI.
ACI technology: For maximum safety in the switchgear cabinet
No more time-consuming dimensioning! Our Type 1 and Type 2 arresters with ACI technology have an integrated switch/spark gap combination. This replaces the otherwise necessary backup fuse. This increases safety, enables flexible installation and raises system availability to a new level.
The DEHN ACI technology
- Peak-level reliability and system availability
- Reliable dimensioning and space savings due to the elimination of the separate backup fuse
- Long service life thanks to high TOV withstand and zero leakage current
- Easy installation due to a smaller cross-sectional area
