ACI technology:
For reliable and durable surge protection.
In times of digitalisation, an energy transition and ever-changing grid parameters, it is becoming increasingly difficult to find the right surge protection. However, in industry in particular, short circuits can lead to serious economic damage due to operational, data and production losses.
DEHN's innovative Advanced Circuit Interruption, or ACI technology for short, can reliably protect systems from such failures. While conventional overcurrent protection devices have to be elaborately dimensioned, our specially developed ACI modules have an integrated switch/spark gap combination. This means that the surge impulse is only conducted at the narrowest point, which is always sufficiently dimensioned. This completely eliminates costly faults caused by manual dimensioning.
In addition, ACI technology renders an external backup fuse superfluous, saving valuable cable lengths for standard-compliant installation. For you, this means more space in the switchgear cabinet, more freedom during installation and reliable system protection.
To the ACI product family
ACI means safety at the highest level
Our new ACI technology eliminates the need for an external backup fuse. This is made possible by the switch/spark gap combination inside the protection modules. It combines the necessary surge protection with the backup fuse. The current is interrupted as soon as the electric arc enters the arcing chamber. The surge impulse is only conducted at the narrowest point, which is always sufficiently dimensioned.
As this process is faster than with standard fuses, the connected cables are subjected to significantly less load in the event of a short circuit. The conductor cross-section used can therefore be reduced to 16 or 6 mm2 of copper depending on the arrester type.
All benefits at a glance
Reliable dimensioning
Forget about time-consuming dimensioning of backup fuses, selectivity and cross-sectional areas – thanks to innovative ACI technology from DEHN. The integrated switch/spark gap combination is precisely adapted to the arrester. This means: no arrester backup fuse, no errors in dimensioning and optimised system availability.
Standard-compliant
According to IEC 60364-5-53, the total length of all cables between the connection points of the SPD assembly must not exceed 0.5 metres. Due to the integrated switch/spark gaps in our ACI arresters, you save one cable. This makes it easier for you to comply with the maximum length.
Space-saving
Type 1 and Type 2 arresters with ACI technology from DEHN have an overcurrent protection module integrated directly in the arrester. This means that the otherwise necessary external backup fuse and the requisite fuse disconnector are no longer required. This saves you precious installation space in the switchgear cabinet.
Convenient
Our compact system solution offers you maximum flexibility during installation. The particularly small connection cross-sectional area of just 6 mm² (Type 2) or 16 mm² Cu (Type 1) enables shorter wiring paths. And, a separate arrester backup fuse is done away with. This saves cable material, time and money.
Durable
The technical properties of the ACI modules are particularly resistant to system faults or tolerance fluctuations and therefore offer long-term protection for your systems. They are also characterised by their TOV withstand and the prevention of leakage currents, which further increases their service life.
Reliable
ACI modules are particularly durable and interrupt even smaller short-circuit currents in the shortest possible time thanks to the integrated switch/spark gap combination. This makes ACI arresters extremely reliable protection modules compared to conventional fuse solutions and reduces the downtime of your system – for maximum system availability.
Relax. It is DEHN ACI technology.
Forget about that time-consuming dimensioning of the backup fuse! Our Type 1 and Type 2 arresters with ACI technology have an integrated switch/spark gap combination. This reduces errors, enables flexible installation and raises system availability to a new level. This is what we here at DEHN call our "no-worries solution".
Further details on the ACI arresters from DEHN can be found on the respective product pages:
Downloads
You can find more information on ACI technology here.
| White Paper | ACI technology | An innovative device concept for SPDs | .pdf 2.2 MB |
Want to find out more about our ACI technology?
We look forward to answering your questions on ACI technology.
Call us on +49 9181 906 1462 or write us an email.
international@dehn.de +49 9181 906 1462