Search : Electronic And Electrical Testing, Safety Testing, Environmental Monitoring

Report on National Quality Inspection of Three Electrical Accessory Products


Time:

2023-03-31

The quality national sampling notification for three types of electrical accessory products involves switches (wall switches), disconnectors, extension cord sockets (with power adapters), and other products for household and similar fixed electrical devices.

 

Report on National Supervision and Random Inspection of the Quality of Household Electrical Appliances in 2022

 

In 2022, the General Administration of Market Supervision organized national supervision and random inspection of the quality of electrical accessory products. The spot check is hereby reported as follows:

 

1、 Basic information

This random inspection of 406 batches of electrical accessory products produced by 405 enterprises involves three types of fixed electrical devices for household and similar purposes, including switches (wall switches), disconnectors, and extension cord sockets (with power adapters). It is found that 18 batches of products are unqualified (see the attachment for details), with a random inspection failure rate of 4.4%. 36 items of 3 products were inspected, including 34 safety items, accounting for 94.4% of the total number of inspection items.

 

2、 Analysis of spot check results

1、 The failure rate of the start-up (wall switch) spot check of household and similar fixed electrical devices is 0.6%.

 

In this random inspection of 177 batches of products produced by 176 enterprises in 11 provinces (cities), it was found that one batch of products was unqualified, with a random inspection failure rate of 0.6%, a decrease of 0.6 percentage points compared to the previous random inspection.  

 

This random inspection focused on 10 safety items such as electric shock protection, structural requirements, moisture resistance, temperature rise, mechanical strength, and heat resistance of switches (wall switches) for household and similar fixed electrical devices. It was found that one batch of products had unqualified heat resistance items.  

 

The above random inspection mainly involves products produced by enterprises in Zhejiang Province and Guangdong Province in the industrial agglomeration areas. 101 batches and 53 batches were randomly inspected, with the failure rate of 1.0% and 0% respectively.

 

2、 The unqualified rate of the partition switch in the spot check is 7.3%.

 

This time, 150 batches of products produced by 150 enterprises in 7 provinces (cities) were randomly inspected in the circulation field, and 11 batches of products were found to be unqualified, with a sampling failure rate of 7.3%.  

 

This spot check focuses on six safety items such as the making and breaking capacity of the disconnector, verification of dielectric properties, leakage current, verification of temperature rise, short circuit performance, and glow wire test. Unqualified items include making and breaking capabilities, and short circuit performance capabilities. After analysis by the technical organization, the main reasons for disqualification are: the shell material of the product has poor high-temperature resistance; The distance between moving and stationary contacts is too small to effectively cut short circuit current; Material quality control is not in place; Poor resistance to fusion welding of contact materials.  

 

The above random inspection mainly involves the products produced by enterprises in Zhejiang Province and Shanghai City, the industrial agglomeration areas. 102 batches and 20 batches were randomly inspected, respectively, with the failure rate of 8.8% and 5%.

 

3、 The unqualified rate of extension cord socket (with power adapter) through spot check is 7.6%.

In this random inspection of 79 batches of products produced by 79 enterprises in 7 provinces (cities), 6 batches of products were found to be unqualified, with a random inspection failure rate of 7.6%, up 1.6 percentage points from the previous random inspection. The unqualified rate of this product through random inspection in the past three years is 12.5%, 6.0%, and 7.6%, respectively.  
This spot check focuses on the inspection of 20 items such as electric shock protection for extension cord sockets (with power adapters), grounding measures, structure of extension cord sockets, power terminal disturbance voltage, and radiation disturbance below 1GHz. Except for power terminal disturbance voltage and radiation disturbance below 1GHz, the rest are safety items. It was found that 4 batches of products were found to be unqualified in terms of electric shock protection, 2 batches of products were found to be unqualified in terms of heat resistance, 1 batch of products were found to be unqualified in terms of the structure of extension cord sockets, and 1 batch of products were found to be unqualified in terms of electrical clearance and creepage distance. According to the analysis of the technical organization, the main reasons for the disqualification of the electric shock protection are: the structural design of the power supply board and the protection door is unreasonable; The main reason for unqualified heat resistance is improper selection of raw materials.  

The above random inspection mainly involves products produced by enterprises in Guangdong Province and Zhejiang Province in the industrial agglomeration area. They have randomly inspected 42 batches and 23 batches, respectively, with a failure rate of 2.4% and 21.7%.

 

3、 Relevant requirements

In response to the problems found in this national supervision and random inspection of product quality, relevant provincial bureaus should do the following work well:
(1) Strengthen the handling of random inspection results. Handle the supervision and random inspection results in accordance with the "Product Quality Law of the People's Republic of China", "Interim Measures for the Management of Product Quality Supervision and Random Inspection", and other regulations. Measures such as sealing up and detaining unqualified products found through supervision and random inspection shall be taken according to law, and it is strictly prohibited for enterprises to leave the factory for sale. For unqualified enterprises, it is necessary to clarify rectification requirements, strictly supervise the implementation of rectification measures, and promptly organize review. Those suspected of committing crimes shall be promptly transferred to judicial authorities. The serious illegal and dishonest enterprises will be included in the list of serious illegal and dishonest enterprises for management according to law. The results should be promptly entered into the e-CQS system. The General Administration will strengthen tracking and supervision, and report the handling results to various regions as appropriate.  
(2) Strengthen territorial quality supervision. The market supervision department of Zhejiang Province should attach great importance to strengthening the quality management of key enterprises with extended wire sockets within its jurisdiction, comprehensively using various means to maintain the high-pressure situation of quality supervision, seriously handle illegal activities, and improve the quality and safety level.  
(3) Urge the implementation of main responsibilities. Inform relevant local governments and departments of the situation of unqualified products in this supervision and random inspection, take effective measures to urge unqualified product enterprises to implement the main responsibility for product quality and safety, organize production and sales in strict accordance with standards and laws, and ensure product quality and safety.
(4) Strengthen quality and technical assistance. Organize relevant industry organizations and technical institutions to help enterprises find out the causes in depth, propose improvement measures and solutions, and promote the improvement of industry quality level.

手机官网
手机官网

Wechat Public

Account