Personnel (types of work) engaged in industrial production systems such as power production, electrical manufacturing, electrical maintenance, and construction and installation industries. Personnel engaged in the research and application of objective laws in the electromagnetic field are usually referred to as electrical engineers. Electrical engineering, as opposed to electronics, mainly studies strong electricity. It can also be abbreviated as electrical engineering. The concept of electrician certificate is that electricians belong to high-risk occupations. In China, the supervision of electricians is very strict, and there are many regulatory departments, mainly manifested in the differences in electrician certificates. Generally, people only know the electrician certificate for employment, but do not know that electrician certificates also differ due to different specific job classifications and issuing departments. Among them, the most widely applicable one is the "Special Operation Certificate", which is also known as the electrician's work permit, also known as the operation certificate. Holding this certificate can engage in electrical work in various enterprises. Next is the "Vocational Qualification Certificate", commonly known as the level certificate. Some people call this a professional title, which is actually misunderstood. This certificate is a proof of the professional level of electricians and serves as the main basis for employers to determine personnel positions. According to relevant laws, this certificate is also one of the necessary certificates for electricians to work, and is a qualification certificate for electricians. There is also the "Electrician Network Operation Permit", which is issued by the National Energy Administration (formerly the State Electricity Regulatory Commission). All personnel engaged in electrical installation, testing, maintenance, operation, and other operations should obtain this certificate. This certificate is one of the necessary certificates for working electricians and is recognized by the power industry as a work permit. It has a wide range of applications and covers all industries of working electricians. In addition to the three common certificates mentioned above, there are also electrician certificates issued by industry associations, construction departments, and other institutions, but their validity cannot be compared to the above certificates
Scope
The high-temperature test specified in this part of GB/T 2423 is applicable to non heat dissipation and heat dissipation test samples.
. There is no substantial difference between Experiment Bb and Experiment Bd from earlier versions The purpose of this high-temperature test is limited to determining the ability of components, equipment, or other products to be used, transported, or stored in high-temperature environments. This high-temperature test cannot be used to evaluate the ability of the test sample to withstand temperature changes and its ability to operate in temperature changing environments. In this case, GB/T 2423.22 should be usedThis high-temperature test method is subdivided into the following types:
- Non heat dissipation test sample high-temperature test:
● Test Bb, temperature gradient.
- Heat dissipation test sample high temperature test:
● Test Bd, temperature gradient
● Test Be, temperature gradient, and the test sample is energized throughout the entire test process The test methods given in this section are usually used for test samples that can achieve temperature stability during testing
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China