For electrical equipment, which ones require a certificate of conformity, which ones require a type approval, and which ones?
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For 10KV distribution cabinets and their various components, 10KV step-down transformers, as well as 380V low-voltage distribution cabinets and their components, certification is definitely required either at the time of leaving the factory or upon completion inspection. What documents are required for other components, such as product certification reports, certificates of conformity, test reports, type test certificates... Thank you!
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10 kV equipment such as transformers, vacuum circuit breakers, current transformers, voltage transformers, overvoltage protectors, insulators, and busbars all require voltage withstanding tests, and factory as well as handover test reports must be provided. The various tests for each type of equipment differ; for example, current transformers need to have their DC resistance, turns ratio, and volt-ampere characteristics measured, while vacuum circuit breakers require testing regarding their opening and closing times, bouncing behavior, and synchronization. The tests for each type of equipment are distinct. The rest requires a factory certificate of conformity, and some need an instruction manual.