Active arc fault protection system
Your power distribution system needs permanently reliable protection? DEHNshort offers exactly that, especially for low-voltage switchgear up to 690 V, 50/60 Hz with a maximum short-circuit current of up to 110 kA.
- Standard-compliant personnel and system protection
- Standard-compliant use in low-voltage switchgear installations
- Maximum system availability
- Modular system structure
- System status is easy to see
Protection for people and systems
We support system operators, electrical consultants or switchgear manufacturers in the selection, planning and execution of suitable protection concepts. The DEHNshort active arc fault protection system is already integrated into switchgear systems (IEC 61439-2) of well-known manufacturers according to IEC TS 63107 and is successfully used by many switchgear manufacturers and panel builders.
DEHNshort already protects people and property in many sectors, including hospitals, production processes, airports, shopping and logistics centres and many more.
All from a single source with personal support.
Our unique selling point: a complete service portfolio combined with end-to-end support – from conception to system integration to ongoing support. Efficient, scalable, future-proof.
Show us your challenges – we are ready for them.
How DEHNshort works
Standard-compliant personnel and system protection, even when the door of the switchgear is open – possible with DEHNshort.
We will explain to you how the active arc fault protection system effectively prevents damage to equipment and personnel.
Detect
In all feeders, protective current transformers positioned upstream of the feeding circuit breakers detect the overcurrent associated with the arc fault.
As a second detection variable, special light sensors detect the extremely bright light of the arc fault. Depending on system requirements, the light sensors are available as a point sensor or fibre-optic sensor.
Evaluate
Electronic detection devices link the sensor signals and activate the quenching devices of the relevant busbar as well as the shunt releases of all feeder circuit breakers in the event of both detection variables appearing.
Quench
By activating the quenching devices, a bolted short-circuit is created in parallel to the arc fault in a very short time. Due to this low-resistance bypass, the voltage collapses and the arc fault is immediately quenched.
Disconnect completely
In order to disconnect the busbar section subject to arc faults, the detection devices control the shunt releases of all feeder circuit breakers.
Restoration of service
After rectifying the original fault, replacing the quenching devices and carrying out an insulation test, the system can be put back into operation within a very short time.
Retrofit? Should be possible.
The DEHNshort active arc fault protection system was primarily developed for use in new low-voltage switchgear installations. Subsequent installation in existing systems is possible under certain conditions. If you have a use case, please do not hesitate to contact us.
The DEHNshort arc fault detection system (without quenching devices) is also suitable for use in medium-voltage switchgear installations. Our specialists are also happy to answer your questions regarding this application.
Determine arc fault protection measures in the dialogue
We will help you to develop your company's own holistic protection concept against arc faults. To do this, we provide you with a guide that helps you and your team understand the initial situations in your company. Further steps will lead you to a tailor-made solution for your challenges.
DEHNshort in use
These manufacturers of low-voltage switchgear have integrated the DEHNshort active arc fault protection system into their switchgear according to DIN VDE 0660-600-2-1 (IEC TS 63107).
Cooperation with Siemens for SIVACON S8
With the SIVACON S8, Siemens-certified Technology partners are offering a switchgear combination with design verification in accordance with IEC 61439 – including the DEHNshort active arc fault protection system.
DEHNshort with VdS certificate
Limiting the effects of an arc fault to a minimum has always been the aim (or maxim) of the DEHNshort active arc fault protection system. In its publication VdS 2344:2020-07 "Procedures for the Testing, Recognition and Certification of Products and Systems of Fire Protection and Safety Technology", the VdS defines requirements for the performance of these systems, to which DEHNshort fully complies.
Downloads
DEHNshort
All about the active arc fault protection system
