The high-voltage common box busbar has excellent short-circuit resistance. Due to the use of aluminum (or weak magnetic steel plate) shell protection, it can effectively reduce the structural heating caused by eddy currents or circulating currents, lower the temperature of the enclosed busbar shell, reduce power loss, improve current carrying capacity, and reduce electricity. This series of bus ducts has excellent structure and can be equipped with equipment maintenance holes at any position on the upper or lower part of the bus. For high current indoor enclosed busbars, ventilation louvers are installed on both sides and the lower part of the fume hood to enhance heat dissipation and reduce temperature rise. By using two-layer insulation and multi-point grounding connections on the shell, the maintenance workload has been significantly reduced and the safety function has been significantly improved.

1) Insulation resistance: The insulation resistance of each part of the enclosed busbar unit should be greater than or equal to 100m Ω with a 2500V megohmmeter.

2) Dielectric strength: Each part of the enclosed busbar must undergo a 1-minute power frequency dry voltage test before leaving the factory. The power frequency withstand voltage and lightning impulse withstand voltage both comply with the specifications.

3) Grounding system: Complies with the grounding system requirements of IEC 364-5-54.

4) Protection level: Indoor type: IP40; Outdoor type: IP43, IP55.

5) Load function: Under rated current, the temperature rise of the casing meets the requirement of GB763-90 "High voltage communication equipment will generate heat during long-term operation".

    Yunnan Youtong Electric Co., Ltd. is a professional manufacturer of bus ducts and cable trays, with high cost-effectiveness. Crafted with ingenuity, it is durable, with complete specifications and low prices. If you need it, please feel free to call us for consultation!