Total bureau of national qualitative check
Close right increase to defend consumer, health of stimulative motor industry develops, total bureau of national qualitative check organizes products of pair of three-phase asynchronous electromotor to pledge the quantity undertook the country is supervised selective examination, selectived examination in all 67 kinds of products that 67 enterprises produce 14 provinces such as Heibei, Shanxi, Liaoning, Jilin, Heilongjiang, Shanghai, Jiangsu, Zhejiang, Fujian, Shandong, Henan, Guangdong, Chongqing, Yunnan, municipality directly under the Central Government (do not involve exit product) , sampling percent of pass of product objective quality is 99.2% .
Selective examination this the basis is mandatory national level GB18613-2006 " medium or small value of demarcate of dynamoelectric function effect reachs three-phase asynchronous can effect grade " , GB14711-2006 " medium or small rotate electric machinery safety asks " , GB755-2000 " rotate electric machinery norm and function " reach relevant product standard to set, hookup of mark of device of ground connection of the product mark to product of three-phase asynchronous electromotor, protection, termination, wiring, insulation resistance, direction of rotation, connection, when power of electric current of torsion of mechanical intensity, locked-rotor, locked-rotor, vibration, noise, overspeed, proof voltage, calorific, rated output. Via examining, it is better that the market has quality of product of large-scale production company, place check project achieves the requirement that relative standard sets entirely.
The main quality problem that in selectiving examination, discovers:
1, individual product can effect function and calorific unqualified. The lukewarm elevatory and consequent loss of electric machinery is big, and the life that affecting electric machinery insulation directly, the safety that affects electric machinery then moves. There is individual product in selectiving examination can effect function and calorific unqualified. Among them value of efficiency of 1 kind of products is compared can effect 3 class index became low nearly 5 percent, under the standard can the requirement that effect demarcate is worth. In the meantime, there is individual product in selectiving examination the bounds that calorific index exceeds a standard to set is worth.
2, individual product direction of rotation is unqualified. The mark of electric machinery direction of rotation and electric machinery terminal reachs winding correctly correct wiring is concerned. There is the requirement that standard of short of of individual product direction of rotation sets in selectiving examination, create the possibility to equipment damage.