technical parameter
● Insulation resistance: the insulation resistance value of each section of closed bus unit should be greater than or equal to 100MΩ 2500V megohmmeter).
● Dielectric strength: Each section of closed busbar is subjected to a 1 minute power frequency dry test withstand voltage test before leaving the factory. The power frequency withstand voltage and lightning impulse withstand voltage values comply with national standards.
● Grounding system: meets the requirements of IEC364-5-54 for grounding system.
● Protection level: indoor type: IP40; outdoor type: IP43, IP55.
● Load performance: Under the rated current, the temperature rise of the shell complies with the requirements of GB763-90 'Fever during long-term operation of AC high-voltage electrical appliances'.
● Short-circuit performance: The dynamic thermal stability test meets the requirements of GB2706-89 'Test Method for Dynamic Thermal Stability of AC High Voltage Electrical Apparatus'. The closed bus duct is widely used in power plants, industrial and mining enterprises and other places as the electrical connection between the generator and the main transformer, the transformer and the high voltage distribution cabinet and the main circuit of the high voltage equipment. The delivery length is set at 2m / section, generally the length of a single section is not more than 3m.