What are the process acceptances of high-frequency switching power supplies and phase-controlled rectifiers?

The process acceptance of high-frequency switching power supply and phase-controlled rectifier device includes the following parts:

(1) The fixing and grounding of the equipment screen and cabinet should be reliable, and the door and the cabinet should be reliably connected through the naked soft wire with a cross section of not less than 6mm2. The surface anti-corrosion coating should be in good condition and the equipment should be clean and tidy.

(2) The electrical components installed in the equipment screen and cabinet should be complete and in good condition, and the installation position is correct and firm. The air circuit breaker or fuse is selected to meet the requirements, and the action is selectively matched to meet the requirements.

(3) The secondary wiring should be correct, the connection is reliable, the mark is complete, clear, and the insulation meets the requirements.

(4) Screens and cabinets used in wet tropics should be moisture-proof, mild-proof and heat-resistant, and should be inspected according to the requirements of General Technology for Tropical Electrical Products.

(5) After installation of equipment screens, cabinets and cables, measures should be taken to seal the holes and prevent the water from freezing through the pipes.

(6) The operation and linkage test are correct, the AC power supply is switched reliably, and the design requirements are met.

Regarding the requirement that the DC power system screen, the cabinet door and the cabinet should be reliably connected through the naked soft wire with a cross section of not less than 6 mm2, it is a new addition. The reason for proposing this regulation is that the metal casing of the secondary electrical appliance itself requires grounding and must provide a reliable grounding path. Second, if the electrical panel can be opened, the cabinet door is not grounded, when the electrical appliance is installed on the door. When the insulation of the casing is damaged, the screen and the cabinet door will have dangerous potentials, which will endanger personal safety. Thirdly, the screen and the cabinet door should be grounded from the perspective of anti-interference of electronic devices such as microcomputers.

Regarding the requirements of the nude flexible conductor with a cross-section of the screen between the screen, the cabinet door and the cabinet of not less than 6mm2, it is mainly considered that the connecting line has good electrical conductivity, and should have sufficient mechanical strength and easy connection. Emphasize the use of naked wires to avoid being easily found when disconnected.


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