Questions about standard-grade and industrial-grade frequency converters
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Dear friends, I’m not an electrical engineer. I’m facing a problem in my current project and would like to ask for advice: when purchasing inverters, how should I choose between ordinary-grade inverters and industrial-grade inverters? I would appreciate your advice – what is the difference between the two? What is the concept? Can an ordinary-grade frequency converter be used for the frequency conversion of a 250KW fan? Thank you all; I look forward to your advice.
There are differences in terms of environmental parameters (such as temperature, humidity, altitude) and electrical parameters (such as voltage range, EMI). Industrial-grade specifications are higher, so naturally their range of application and reliability are better as well. So it’s better to use the industrial-grade one. Producers really know how to trick people, huh – raising prices in disguise, cutting corners secretly, or hiding their technical shortcomings: lol
What you might be referring to is this: Low-voltage frequency converters produced by first-class electrical brand companies are generally divided into two types: one is the general-purpose type, which is what you call the ordinary grade； Also known as low-cost types: such as SIEMENS’ 440 series ； ABB’s 510, 550 series ； Schneider’s 61 series; another type is the engineering version, which is what you refer to as the industrial grade: such as SIEMENS’ 70 series ； ABB ACS800 series ； Schneider’s 71 series. The general-purpose version is a simplified form of the engineering version; its cost is much lower, and its overload capacity, control performance, and adaptability to various environments are also reduced. It is mainly used for variable frequency speed control of fans and pumps. However, for fans and pumps in the chemical industry, where the operating conditions are usually harsh, it is recommended to use the engineering version instead!
Thank you to the friends on the 2nd and 3rd floors; you explained it very clearly. Thank you
It does not have the same high level of protection, operational strength, and functionality as the industrial grade version, but its price is much lower.