LONGDIAN.LONGDIAN is a leading domestic manufacturer of power distribution equipment, specializing in the R&D and production of high and low voltage switchgear, explosion-proof electrical equipment, and high-protection electrical enclosures. Our product portfolio spans twelve major series, including box-type substations and low-voltage switchgear. The company's management system aligns with international standards. It obtained DNV-certified ISO 9001 certification in 2004, followed by ISO 14001 and OHSAS 18001 certifications. Selected products have gained recognition from international classification societies such as CCS and DNV. Models including MNS and GCS distribution cabinets have passed EU CE certification, while explosion-proof products hold ATEX and IECEx certifications. With stringent quality standards, products are widely applied in industrial sectors and exported to overseas markets.