We have always believed that an equally good product must stand the test of the market and pass the certification system. UL is mainly engaged in product safety certification and operating safety certification business. Its ultimate goal is to obtain products with a relatively safe level for the market, and to contribute to the assurance of personal health and property safety. In terms of product safety certification as an effective means to eliminate technical barriers to international trade, UL also plays an active role in promoting the development of international trade.
Specifications for terminal block products manufactured in Europe follow IEC standards, while products manufactured in the United States follow UL standards. There is no uniform standard for determining the power and performance specifications of terminal block products, so users need to understand the differences between UL and IEC specifications.
The difference between the two standards is huge. Engineers who do not know how to measure product specifications take considerable risks because they may select devices that do not meet the required power levels, or that select devices whose specifications are far beyond the design requirements. In Europe, the current rating of a device is determined by monitoring the temperature of the metal conductor as the current increases. When the temperature of the metal pin is 45°C higher than the ambient temperature, the measurement personnel will take the current at this time as the rated current value (or maximum current value) of the device. Another item in the IEC specification is the allowable current value, which is 80% of the maximum current. In contrast, the UL standard will make 90% of the current value when the metal conductor temperature is 30 °C higher than the ambient temperature as the nominal current value of the device.
It can be seen that the temperature of the metallic conductor part is a very important factor in all applications. For industrial equipment this is even more important. Because industrial equipment usually needs to work in environments with temperatures as high as 80°C. If the temperature of the terminal is 30°C or 45°C higher than this temperature, the temperature of the terminal will exceed 100°C. Depending on the type of nominal value and insulation material used for the device selected, the products must operate at currents below the rated value so that they can operate reliably over the desired temperature range. Occasionally, materials suitable for compact packaged devices may not be well suited for thermal dissipation requirements, so such terminal block devices must be used with currents well below their rated values. In this way, it reflects the importance of how to choose terminals. Xiongchuan Equipment is a professional manufacturer of terminal crimping machines, and will serve our customers with the best quality products.
