What projects are included in power distribution engineering?

　　Distribution engineering is the project that enables users to convert electricity from a 10 kV high-voltage line into accessible and usable 220 V/380 V power. Specialized distribution companies have a broad scope of application and stringent technical requirements; only those with professional installation qualifications are permitted to carry out such work. Given the highly specialized nature of distribution system installation, power-supply authorities impose qualification requirements on construction firms, mandating that they hold a “License for Installation of Power Facilities” in order to be authorized as installation contractors. Professional installation companies not only ensure construction quality but also guarantee that the distribution system is designed in a scientifically sound and rational manner.

　　What projects are included in distribution engineering?

　　Distribution engineering encompasses telegraph installation, internal wiring works, external line works, transformer and distribution works, power and lighting works, and lightning protection and grounding works, among others.

　　1. The telegram covers a series of procedures, ranging from the user’s electricity application to intermediate review, completion acceptance, electrical testing, and equipment handover.

　　2. Internal projects include electrical and lighting wiring works, among others.

　　3. External engineering primarily refers to outdoor power lines, such as overhead power lines and cable routing.

　　4. The power and lighting works encompass the installation of various electrical equipment, while the lighting works include the installation of lighting fixtures, electric fans, air conditioners, electrical appliances, sockets, distribution boxes, and other related components.

　　5. Power transformation and distribution works refer to the installation, securing, wiring, commissioning, and acceptance testing of equipment such as transformers and high- and low-voltage switchgear.

　　6. Lightning protection engineering refers to the lightning protection measures for engineering structures and electrical equipment.

　　7. The grounding system project includes the installation of grounding for input equipment, power distribution equipment, conduit wiring, lighting fixtures, switches and outlets, and lightning protection grounding, among other equipment.

　　What are the specific installation steps for distribution engineering?

　　Distribution cabinet installation: First, after the shipboard switchgear is transported to the construction site, inspect the equipment for damage, deformation, or paint removal, and verify that all associated accessories are complete. Next, in accordance with the relevant construction drawings, the switchgear cabinets can be sequentially placed on the steel structure and aligned one by one. Once alignment is complete, secure all distribution cabinets with screws.

　　Circuit Wiring: Prior to shipment, we must complete the secondary wiring inside the distribution cabinet, as well as all on-site installation connection cables. Once all installations are finished, an organized acceptance inspection shall be conducted under the supervision of the Client’s engineer, accompanied by the delivery of all relevant technical documentation and a single-unit insulation performance test.

　　Other considerations for distribution engineering:

　　1. The drawer’s push force must be exceptionally smooth, with no sticking or jamming.

　　2. The midline between dynamic contact and static contact must be consistent. The contact during these two phases must be extremely close.

　　3. The chains on drawers must also be inspected, and the chains on distribution cabinets and other equipment must be reliable.

　　4. During the installation of the distribution cabinet, ensure that the paint coating remains intact and undamaged, and that all internal lighting fixtures are fully functional.

　　5. In addition, the equipment in the distribution room must have proper grounding.