Requirement 1: The current flowing through the human body shall not exceed the human perception level of 1mA; 2. The surface field strength of the human body should not exceed the perceived level of 2.4KV/cm; 3. Ensure the air distance that may cause personal discharge. Protective measures (1) For indirect operations on 220 V transmission lines, towers, and substation structures (including work with pole and tower screws), conductive shoes should be worn to limit the human body current (transient and steady-state) caused by the electric field to less than 1 mA. (2) Equipotential operation and intermediate potential method operation on ultra-high voltage transmission and transformation equipment must wear qualified full shielding clothing, and pay attention to the reliable connection of all parts. It is not allowed to detach during operation. (3) When climbing the 500 kV tower structure, the electrostatic induction of the human body is very strong. To prevent the human body from being affected by electric fields and electromagnetic waves, it is necessary to wear a full set of shielding clothes for operation. Shielding suits are divided into types I and II. For 500KV, type II shielding suits are used, which limits the surface field strength of the human body to below 15 kV/m, and the current flowing through the human body is not more than 50 μ A. (4) Ensure a sufficient safety distance (air gap) from live objects during indirect operations. (5) The insulation tools used for indirect operations are qualified, with an insulation resistance greater than 700M ohms per 2 centimeters
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