Time： 2021-09-07 10:48:43
Explosion proof motors are mainly used in coal mines, petroleum and natural gas, petrochemical and chemical industries.
The rated voltage, rated current, power and speed of explosion-proof motor are the same as those of three-phase asynchronous motor, that is, there are more explosion-proof signs for explosion-proof motor: ex I, explosion-proof type + equipment category + (gas group) + temperature group explosion-proof type.
The standard for explosion-proof motors is the energy efficiency limit value and energy efficiency grade of small and medium-sized three-phase asynchronous motors jointly issued by the General Administration of quality supervision, inspection and quarantine and the China National Standardization Administration Committee. In the industry of explosion-proof motors, the basic series of explosion-proof motors should follow this standard.
1. The explosion-proof motor industry must resolutely implement the explosion-proof motor standard of energy efficiency limits and energy efficiency grades of small and medium-sized three-phase asynchronous motors, which can achieve the goal of energy conservation and emission reduction in China and make a great contribution to environmental protection. The production license of explosion-proof electrical products will also be issued in accordance with the new standard of explosion-proof motor industry;
2. Although the energy efficiency value in the national standard gb18613-2012 has been improved compared with the previous version, all specifications of Yb3 series flameproof three-phase asynchronous motors promoted in this industry in China meet the level 3 energy efficiency limit in gb18613-2012, and some specifications can reach the level 2 target energy efficiency limit in the new standard.
3. The manufacturer of Yb3 series motors is requested to speed up the production and market promotion. At that time, the national explosion-proof electrical product quality supervision and inspection center, the production license examination department of explosion-proof electrical products and other relevant departments will assist the enterprise in this work.
4. Since September 1, 2012, all manufacturers or importers shall add energy efficiency labels to small and medium-sized three-phase asynchronous motors delivered or imported in accordance with the national standard GB 18613-2012 limited values and energy efficiency grades of small and medium-sized three-phase asynchronous motors. At present, the energy efficiency labeling management center of China Institute of standardization has begun to accept the filing according to the new standard, and our company has filed. The newly filed segment is the same as before, but the test method is modified from the original calculation method of miscellaneous loss according to 0.5% to the loss analysis method of measuring input-output power according to method B in GB / T 1032. For models that have been previously filed according to the 2006 standard, change filing is required, and a test report shall be provided in paragraph 1 of change filing.