Waterproof busbar trunking is a new circuit model developed in the United States, known as the "Waterproof busbar trunking system". It uses copper or aluminum as a conductor, supported by a non olefin insulation layer, and then installed in a metal groove to form a new conductor. At present, it has become an essential wiring method in high-rise buildings, factory electrical equipment, and power systems. However, when the distribution system of a building is difficult to use, it will be difficult to use. In addition, it can make buildings more beautiful.
Modern high-rise buildings and large workshops require a large amount of electricity. Faced with such a huge load, choosing a safe and reliable conductive device requires a strong current of hundreds of thousands of amperes, and a bus system is a good choice. The waterproof bus duct system is an efficient power distribution equipment, especially suitable for the economical and reasonable wiring requirements of increasingly tall buildings and large factories.
There is a certain amount of air insulation between the phase lines. Various elbows adopt vulcanization insulation technology. The straight section adopts MT-7-3 rubber sleeve. Vulcanized insulation technology: The material is CZ260 fast curing insulation powder, which adopts quaternion crosslinking curing, and there is no gap between the insulation layer and the conductive bar. Its heat dissipation performance, moisture resistance, and insulation reliability are all very good. However, due to its higher cost than second-generation buses, it has not been widely promoted.
Other relevant information:
Bus welding: L-shaped (horizontal bending) and T-shaped buses are welded through the bus, but there are no relevant standards in national standards. It is said that welding seam inspection (according to GB33 level 23 standard) needs to be considered.
The existing high protection level reaches IP66 or above, solving the waterproof problem. Shanghai Waigaoqiao adopts domestic IP68 outdoor bus dedicated air ducts. Compared to cables, its advantages and disadvantages are only the difference between mains power and radiation power.
Structural characteristics of waterproof bus duct:
1. Suitable for large-span installation
The waterproof bus duct shell adopts rolling forming, with small volume and beautiful appearance, greatly improving its long-term bearing capacity. The bus center with a span of 6 meters can withstand a load of 60 kilograms and a deflection of no more than 10 millimeters.
2. Easy to install
Adopting automatic compensation and single bolt clamping terminal connection, it has strong adjustability, making the installation process of waterproof busbar duct very convenient and flexible, greatly saving installation time.
3. Very safe and reliable
(1) It has independent air insulation, and the safety gap distance and creepage distance between phases are much greater than the standard requirements.
(2) High strength engineering plastics are used to improve the dynamic resistance and thermal stability of waterproof bus ducts.
(3) The special structure of the joint can prevent misoperation during installation.
(4) There is a safety protection board installed on the socket. The insertion box can only be inserted when the protective cover is open. When not using the socket, the protective baffle can be closed and sealed with lead to prevent dust or foreign objects from entering the socket, and to prevent the energy meter from striking the input power supply. Improved the protection performance of the waterproof busbar duct, prevented misoperation, and greatly improved the safety performance of the busbar.