As an everyday person most of these LED power supply symbols will probably seem strange and obscure and probably bear no relevance, just confirm the item works that’s all you need. Even to the electrical/lighting
MTBF (Mean Time Between Failures) is a reliability metric that measures the average time between failures of a system or component. It is commonly used in the field of reliability engineering to assess the reliability of products or systems. MTBF provides an estimate of how long a device or system is expected to operate before experiencing a failure. It is usually expressed in hours.
Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. It mainly consists of a primary coil, a secondary coil and an iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. Transformers exported to the EU require CE certification.
Among the many international technical standards aimed at ensuring product quality and safety, IEC 61558 is important to engineers working with any equipment that contains a transformer or power supply.
External power supplies are power adaptors used to convert household electric current into lower voltage DC current - in order to operate a large variety of household and office products like electric tooth brushes and shavers, mobile and cordless phones, laptops and tablets, as well as printers, routers and modems.
The previous section identified many of the national and international bodies that either define regulatory requirements for product safety or provide testing and certification to assure users that the device or equipment complies with the relevant standard(s). Consequently, conformance marking of products to show this compliance is a necessary prerequisite for their sale in most industrialized countries and may be a legal or contractual obligation.
The ability to sell external power supplies or led drivers types, around the world depends on meeting the relevant safety standards that apply in those territories. These standards are defined and
Lightning strikes are a common source of external surge transients and carry far more current at far higher voltages than most electronic systems are rated for. These voltage surges are typically large enough to cause the immediate failure of electronic devices if the appropriate level of protection has not been applied.
Reputable manufacturers of power devices like LED drivers and transformers prioritize safety and longevity in the design phase because low voltage does not necessarily mean low risk. Safety classifications such as UL, Class 2 and Class P (discussed in our previous blog) are important to consider, but what about enclosure ratings for lighting systems installed in outdoor settings?