HELLA lighting systems are known for their high quality and their compliance with limit values in terms of EMC compatibility. They are absolutely reliable and are not affected by various sources of interference. This article explains what exactly electromagnetic compatibility is all about and why compliance with the standards is so important. The information and examples of the article relate primarily to the beacons product group.
Every electronic device emits electromagnetic radiation or electromagnetic interference. Electromagnetic compatibility, or EMC for short, describes how electronic devices react with and among each other. A large number of electronic products are installed in every vehicle. Therefore, it must be ensured that mutual interference or even unintentional failures in other devices in the vicinity are avoided. This is called interference emission.
At the same time, the installed devices must be protected from the interference of other sources of radiation so that they function perfectly around other electronic devices. This is also known as interference immunity. Good electromagnetic compatibility is achieved when a product is resistant to interference from other devices and at the same time does not emit interference itself.
Lighting products can be disrupted by electromagnetic interference sources from vehicle electronics, causing their regular function to be impaired. Using reliable beacons is particularly important forhazardous goods transporters, emergency vehicles, construction machinery, agricultural vehicles and other work contexts that involve increased risk. Otherwise, failure of the lamps could quickly lead to dangerous situations and, in the worst case, personal injury.
Within the EU, there is a law for electronic devicesthat regulates the electromagnetic compatibility of equipment that is being brought onto the roads. Such devices must comply with the relevant protection requirements and specifications for interference emission and interference immunity that have been defined in the standards. The legal regulations apply:
The ECE R10 EU certification symbol also applies to tested devices. This provides information about the electromagnetic compatibility and checks whether the interference emissions and the interference reception of a device are within the limit values. All vehicle electronics must have ECE R10 approval. For certain areas of use on the road, the ECE R65 certification symbol is also required.
It is essential to observe the CISPR standard for EMC. CISPR 25 is a technical standard on interference emission, which is divided into classifications from 1 (worst) to 5 (best).
Class 5 products meet the highest requirements and can be installed directly next to an antenna, for example. Devices with classification 3 already meet the legal standards and offer reasonable protection in common practice. Their interference emission is so low that other electrical devices are not negatively affected.
HELLA's modern lighting systems are characterised by their particularly high quality. They belong at least to class 3, many products even to class 5. They are proven to be absolutely functionally safe and reliable in all applications.
You will find the EMC information through a test number noted on the product itself as well as in the technical specifications. At HELLA, the EMC symbol can be found in the "Technical data" under "EMC protection". There you can also read whether and what protection is available. For example, CISPR25 class 5 may be specified.
EMC is very important when operating various devices and lighting in vehicles. To ensure that the electrical devices do not interfere with each other's functionality, they must comply with certain limit values in terms of interference emission and interference resistance. Reliable lighting is essential, especially for beacons on emergency vehicles, hazardous goods transporters, agricultural vehicles and construction machinery. The risk would be too great if the lighting were to fail because the limit values were not adhered to. To be on the safe side, use a tested lighting system that has at least classification 3.
It has become clear that electric vehicles play an important role in future mobility. These vehicles are already appealing as a result of their zero emissions, lower operating noise and cheaper maintenance costs.
With the HELLA rain-light sensor (RLS), you are safe on the road – whether in rainy weather or even in varying lighting conditions while driving, for instance in tunnels. With this intelligent solution, HELLA combines rain and ambient light detection in just one sensor. It was specially designed for vehicles with steeply sloping windscreens. HELLA is currently the only supplier on the market with this product and equips vehicles with a windscreen inclination of 80° to 90°: this ensures that trucks, buses/coaches, agricultural machinery, construction machinery or motor homes reach their destination safely on every journey.
Vans, panel vans or small commercial vehicles with electric drive offer many advantages for tradespeople. They are particularly suitable for inner-city traffic and short journeys – which is why courier and delivery services as well as tradespeople have already increasingly switched to electrically driven vans to travel to and from customer premises. Those of us focussing on road safety when delivering parcels, groceries or visiting customers use the AVAS acoustic vehicle alerting system. It generates an artificial driving noise at low speeds to draw the attention of other road users towards the electric vehicle and thus increase safety.