Electric motors are the power drive devices for various equipment, and are commonly used in many industries and fields such as chemical plants, coal mines, metallurgy, and public utilities. They are the most power-consuming machines. In order to respond to the national 12th Five-Year Plan and for the economic interests of enterprises themselves, saving electricity and reducing costs, choosing a high-efficiency and energy-saving motor is very important.
However, when purchasing motors, we often don't know how their energy efficiency is classified. Determining a motor's energy efficiency rating can be difficult for us, but after our explanation below, we will understand how motor energy efficiency is classified.
The standards for classifying motor energy efficiency vary across different countries and periods. Even within China, the classification of motor energy efficiency levels changes over time. In 2006, my country issued GB_18613-2006, the standard for "Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grade Assessment of Electric Motors".
However, in 2012, with my country's development and internationalization progressing in tandem, our country issued GB_18613-2012, the standard for minimum energy efficiency limits and energy efficiency rating of electric motors, as shown in the table below.
It's not hard to see that the following table appears on certain models.
Take the YBX3 energy-saving explosion-proof motor as an example. It is classified as Grade 1 energy efficiency in GB_18613-2006_Energy Efficiency Limits and Energy Efficiency Standards for Electric Motors, but it is classified as Grade 2 energy efficiency in GB_18613-2012_Energy Efficiency Limits and Energy Efficiency Grades Standards for Electric Motors.
The YB2 series motors are classified as Level 2 energy efficiency motors according to GB_18613-2006 standard for energy efficiency limits and energy efficiency rating of electric motors. However, according to the 2012 standard for motor energy consumption classification, they belong to Level 3 energy efficiency explosion-proof motors, which are considered high-energy-consuming motors. Of course, with technological advancements and increasing demands for energy conservation in explosion-proof motors, energy efficiency standards may change, and the energy efficiency ratings determined by different methods at different times will therefore vary.
A picture to understand high-efficiency motors
