- \n
- Rated voltage: 10kV<\/li>\n
- Rated current: 400A \/ 630A<\/li>\n
- Indoor air insulated structure<\/li>\n
- Auto-gas arc extinguishing technology<\/li>\n
- Reliable load switching performance<\/li>\n
- Optional grounding blades<\/li>\n
- Manual or motorized operation available<\/li>\n
- Compact design for switchgear integration<\/li>\n
- Visible isolation gap<\/li>\n
- High mechanical durability<\/li>\n
- Polymer or porcelain insulator options<\/li>\n<\/ul>\n
\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438<\/h2>\n
\n\n\n\n
\n \n\u0410\u0440\u0442\u0438\u043a\u0443\u043b<\/th>\n VNA-10\/400<\/th>\n VNA-10\/630<\/th>\n<\/tr>\n<\/thead>\n \n \u041d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u0435 \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435<\/td>\n 10kV<\/td>\n 10kV<\/td>\n<\/tr>\n \n Maximum Operating Voltage<\/td>\n 12 \u043a\u0412<\/td>\n 12 \u043a\u0412<\/td>\n<\/tr>\n \n \u041d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u0442\u043e\u043a<\/td>\n 400A<\/td>\n 630A<\/td>\n<\/tr>\n \n Rated Breaking Current<\/td>\n 400A<\/td>\n 630A<\/td>\n<\/tr>\n \n Thermal Withstand Current<\/td>\n 20kA \/ 1s<\/td>\n 20kA \/ 1s<\/td>\n<\/tr>\n \n Peak Withstand Current<\/td>\n 51kA<\/td>\n 51kA<\/td>\n<\/tr>\n \n Frequency<\/td>\n 50Hz \/ 60Hz<\/td>\n 50Hz \/ 60Hz<\/td>\n<\/tr>\n \n Mechanical Life<\/td>\n 2000 Operations<\/td>\n 2000 Operations<\/td>\n<\/tr>\n \n Installation<\/td>\n Indoor<\/td>\n Indoor<\/td>\n<\/tr>\n \n Arc Extinguishing Method<\/td>\n Auto-Gas<\/td>\n Auto-Gas<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n \n
Working Principle<\/h2>\n
The VNA load switch uses a self-generated gas arc extinguishing chamber. During switching operations, the electric arc formed between contacts heats the chamber material, generating gas that rapidly cools and extinguishes the arc. This ensures safe interruption of load currents and minimizes contact wear.<\/p>\n
\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f<\/h2>\n
The VNA-10 load switches are commonly used in:<\/p>\n
- \n
- Indoor switchgear panels<\/li>\n
- Ring main units (RMU)<\/li>\n
- Compact transformer substations (KTP)<\/li>\n
- KSO and KRU cabinets<\/li>\n
- Industrial power distribution systems<\/li>\n
- Utility substations<\/li>\n
- Mining and infrastructure projects<\/li>\n<\/ul>\n
Product Advantages<\/h2>\n
Reliable Arc Quenching<\/h3>\n
Auto-gas arc extinguishing technology provides stable and efficient load interruption.<\/p>\n
Compact Structure<\/h3>\n
Ideal for installation inside medium voltage switchgear cabinets and compact substations.<\/p>\n
Safe Operation<\/h3>\n
Mechanical interlocking prevents incorrect grounding and switching operations.<\/p>\n
Long Service Life<\/h3>\n
Designed for high operational reliability with low maintenance requirements.<\/p>\n
Optional Configurations<\/h2>\n
- \n
- Left-side or right-side operating mechanism<\/li>\n
- Grounding blades on one or both sides<\/li>\n
- Fuse combination type<\/li>\n
- Polymer insulator version<\/li>\n
- Porcelain insulator version<\/li>\n
- Motorized operating mechanism<\/li>\n<\/ul>\n
![\"\u043f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u0438](\"http:\/\/www.wolunelectric.com\/wp-content\/uploads\/2025\/03\/VNA-LOAD-SWITCHES-DRAWING.jpg\")
<\/p>\n![\"\u043f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u0438](\"http:\/\/www.wolunelectric.com\/wp-content\/uploads\/2025\/03\/VNA-10-400-load-switches-scaled.jpg\")
<\/div>\n