Jiangsu Changyun Intelligent Technology Co., Ltd Quality Control

• IEC 62271 series (modularly adopted in GB/T standards) – High-voltage switchgear and controlgear
• IEC 466 – A.C. metal-enclosed switchgear and controlgear for rated voltages from 1 kV to 38 kV

• GB/T 1984 – High-voltage alternating-current circuit-breakers
• GB 1985 – High-voltage alternating-current disconnectors and earthing switches
• GB 3804 – 3.6–40.5 kV high-voltage alternating-current load break switches
• GB 3906 – 3.6–40.5 kV alternating-current metal-enclosed switchgear and controlgear
• GB 4208 – Degrees of protection provided by enclosures (IP Code)
• GB/T 11022 – Common specifications for high-voltage switchgear and controlgear
• GB/T 16927.1 – High-voltage test techniques – Part 1: General definitions and test requirements
• GB/T 17467 – High-voltage/low-voltage prefabricated substations

• DL/T 403 – 12–40.5 kV high-voltage alternating-current vacuum circuit-breakers
• DL/T 404 – 3.6–40.5 kV alternating-current metal-enclosed switchgear and controlgear
• DL/T 486 – High-voltage alternating-current disconnectors and earthing switches
• DL/T 593 – Common specifications for high-voltage switchgear and controlgear

All units undergo 100% factory testing and third-party verification to meet the above standards, ensuring seamless compliance with local grid requirements worldwide. Complete test reports and certification documents are available upon request for project approval.Specify your required rating – we deliver accordingly.