Bus duct is generally used in the connection between transformer and distribution cabinet, and the power supply system from the distribution center (distribution panel, cabinet) to the load in tree type dry wiring pipeline (for power supply and distribution, trunk power transmission and distribution, and supporting the incoming box, plug-in switch box and other units, as well as overload, short circuit, leakage, undervoltage and other protection functions). It is suitable for AC frequency of 50 Hz, system current level of 100 ~ 5000 a, rated voltage of 400 ~ 1000 V, protection level of IP40 ~ IP65. According to the number of conductors, it is equipped with three-phase four wire system and three-phase five wire system (independent PE bar is added, and some manufacturers provide aluminum alloy shell as integral grounding PE).
The installation site of the bus duct system needs to reserve connecting supports (such as lifting wire, lifting cross arm, combined hanger, gantry bearing bracket, etc.) for hoisting or supporting the main body of the bus duct. The connecting supports need to be customized according to the specific installation route and path. It is recommended to place a group of connecting supports at an interval of less than 3m.
2. Safety measures
The manufacturer of epoxy resin vulcanized bus duct introduces that the bus duct system is of modular structure and follows the design concept of anti fool. During the laying and installation, the construction should be carried out step by step in strict accordance with the installation drawings, and the operation of each step should be in place to maximize the safety. Tin or silver plating is recommended for the bus lap joint to prevent conductor oxidation and reduce the contact resistance during connection, so as to ensure the overall current carrying capacity and safety.
3. Bus transportation and storage
(1) Bus transportation
When lifting or hoisting the bus duct, the manufacturer of epoxy resin vulcanized bus duct introduces that the weight of bus duct should be evenly distributed, and the lifting device that will not damage the bus duct should be used; The principle of handling with care must be maintained, and it is strictly prohibited to sell goods; When loading, the bus should be delivered and installed first, large first then small, bell first then light, straight section of bus duct should be installed first, then elbow bus duct should be installed, and finally accessories (accessory box, start box, plug box and bracket) should be installed.
Requirements for stacking of bus duct accessories:
Before delivery, the accessories should be packed in wooden cases and packed with packing tape. Pay attention to the warning signs on the outside of the wooden cases, lift them according to the lifting signs, handle them with care, do not collide with other objects, and do not roll the box. When stacking, the number of stacking layers should not exceed 2, and follow the principle of "heavy bottom, light top".
Stacking requirements of plug box:
The manufacturer of epoxy resin vulcanized bus bar introduces that when loading the plug-in box, the number of stacking layers shall not exceed 3. When stacking, pay attention to handle with care, and it is strictly forbidden to throw or roll the plug-in box.
Protection requirements between layers and
Before loading, 40X40mm wooden sticks are placed at the bottom of the carriage, and the maximum number of layers can not be exceeded. As long as the products and products are in contact with other objects, such as carriages and nylon ropes, 850/810 foam boards or 40X40mm sticks are used to isolate them.
After loading, the goods on the vehicle shall be covered with tarpaulin in time to ensure that the goods are free from moisture and dust during transportation.
(2) Bus duct storage
The bus duct shall be stored in a covered, clean and dry room with controllable temperature and humidity to prevent condensation. The bus duct should not be in contact with corrosive steam, liquid, salt or concrete. If possible, the bus duct should be stored away from the rabbit outdoors. If outdoor storage is unavoidable, the bus duct should be stored away from the ground and protected by full covering. The rabbit is affected by dirt or moisture.