- \n
- Rated voltage: 12kV \/ 24kV<\/li>\n
- Rated current: 400A \/ 630A \/ 1250A<\/li>\n
- Indoor air insulated structure<\/li>\n
- Puffer-type arc extinguishing system<\/li>\n
- Fuse-switch combination available<\/li>\n
- Optional earthing switch configuration<\/li>\n
- Compact modular design<\/li>\n
- Reliable load switching performance<\/li>\n
- Manual or motorized operating mechanism<\/li>\n
- Mechanical and key interlocking supported<\/li>\n
- Suitable for metal enclosed switchgear and RMU systems<\/li>\n
- Equivalent replacement for ABB NAL\/NALF load break switch<\/li>\n<\/ul>\n
\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 FN18-12<\/th>\n FN18-24<\/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 12 \u043a\u0412<\/td>\n 24 \u043a\u0412<\/td>\n<\/tr>\n \n \u041d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u0442\u043e\u043a<\/td>\n 400A \/ 630A \/ 1250A<\/td>\n 400A \/ 630A \/ 1250A<\/td>\n<\/tr>\n \n \u041d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u0430\u044f \u0447\u0430\u0441\u0442\u043e\u0442\u0430<\/td>\n 50Hz \/ 60Hz<\/td>\n 50Hz \/ 60Hz<\/td>\n<\/tr>\n \n Short-Time Withstand Current<\/td>\n 20kA \/ 25kA \/ 31.5kA<\/td>\n 16kA \/ 25kA \/ 31.5kA<\/td>\n<\/tr>\n \n Peak Withstand Current<\/td>\n 82kA<\/td>\n 82kA<\/td>\n<\/tr>\n \n Power Frequency Withstand Voltage<\/td>\n 42kV \/ 45kV<\/td>\n 55kV \/ 70kV<\/td>\n<\/tr>\n \n Lightning Impulse Withstand Voltage<\/td>\n 75kV \/ 85kV<\/td>\n 125kV \/ 145kV<\/td>\n<\/tr>\n \n Mechanical Life<\/td>\n 2000 Operations<\/td>\n 2000 Operations<\/td>\n<\/tr>\n \n Arc Extinguishing Method<\/td>\n Puffer Air Type<\/td>\n Puffer Air Type<\/td>\n<\/tr>\n \n Installation<\/td>\n Indoor<\/td>\n Indoor<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n \n
Working Principle<\/h2>\n
The FN18 load break switch adopts a compressed-air and gas-generating puffer arc extinguishing chamber. During opening operations under load conditions, the mechanism generates airflow that rapidly cools and extinguishes the arc, ensuring safe interruption of load current while minimizing contact erosion. In fuse combination versions, high voltage current-limiting fuses provide short-circuit protection and automatic tripping functionality.<\/p>\n
Main Configurations<\/h2>\n
FN18 Standard Load Break Switch<\/h3>\n
- \n
- Three-pole load switch<\/li>\n
- Suitable for cable and line switching<\/li>\n
- Compact switchgear installation<\/li>\n<\/ul>\n
FNR18 Fuse Combination Type<\/h3>\n
- \n
- Integrated high voltage fuse holders<\/li>\n
- Transformer and motor protection<\/li>\n
- High short-circuit interruption capability<\/li>\n<\/ul>\n
FN18 with Earthing Switch<\/h3>\n
- \n
- Quick-make grounding switch<\/li>\n
- Enhanced maintenance safety<\/li>\n
- Mechanical interlocking system<\/li>\n<\/ul>\n
\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f<\/h2>\n
The FN18 indoor load break switch is widely used in:<\/p>\n
- \n
- Ring Main Units (RMU)<\/li>\n
- Medium voltage switchgear<\/li>\n
- Compact substations<\/li>\n
- Transformer protection systems<\/li>\n
- Industrial power distribution<\/li>\n
- Utility substations<\/li>\n
- Urban distribution networks<\/li>\n
- Renewable energy substations<\/li>\n
- High-rise building power systems<\/li>\n<\/ul>\n
\n
Product Advantages<\/h2>\n
Equivalent to ABB NAL\/NALF<\/h3>\n
Compatible design and performance suitable for replacement and OEM switchgear applications.<\/p>\n
Reliable Arc Interruption<\/h3>\n
Puffer-type air insulation technology ensures efficient and stable load switching operations.<\/p>\n
Compact Modular Design<\/h3>\n
Flexible configurations allow integration into various switchgear and RMU systems.<\/p>\n
Integrated Protection<\/h3>\n
Fuse combination type provides reliable overload and short-circuit protection for transformers and cables.<\/p>\n
Optional Accessories<\/h2>\n
- \n
- Motor operating mechanism<\/li>\n
- Auxiliary contacts<\/li>\n
- Fuse trip mechanism<\/li>\n
- Grounding switch<\/li>\n
- Shunt trip device<\/li>\n
- Mechanical door interlock<\/li>\n
- Key interlock<\/li>\n
- Remote control system<\/li>\n<\/ul>\n
Compliance Standards<\/h2>\n
- \n
- IEC 60265-1<\/li>\n
- IEC 62271-103<\/li>\n
- IEC 62271-105<\/li>\n<\/ul>\n<\/div>\n
![\"fn18](\"http:\/\/www.wolunelectric.com\/wp-content\/uploads\/2021\/12\/FN18-Load-Break-Switch.jpg\")
<\/div>\n<\/div>\n\u0413\u0430\u0431\u0430\u0440\u0438\u0442\u043d\u044b\u0435 \u0440\u0430\u0437\u043c\u0435\u0440\u044b<\/h2>\n
FN18 \u0412\u044b\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u044c \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438 12 \u043a\u0412 17,5 \u043a\u0412 \u0438 24 \u043a\u0412<\/h3>\n
![\"fn18](\"http:\/\/www.wolunelectric.com\/wp-content\/uploads\/2021\/12\/FN18-12-12KV-24KV-LOAD-BREAK-SWITCH.jpg\")
<\/p>\n![\"\u041a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044f](\"https:\/\/sc01.alicdn.com\/kf\/HTB1.QVWmN6I8KJjSszfq6yZVXXaZ\/200406535\/HTB1.QVWmN6I8KJjSszfq6yZVXXaZ.jpg_.webp\")
<\/div>\n![\"\u041a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044f](\"https:\/\/sc01.alicdn.com\/kf\/HTB1GEWUmMfH8KJjy1zcq6ATzpXaH\/200406535\/HTB1GEWUmMfH8KJjy1zcq6ATzpXaH.jpg_.webp\")
<\/div>\n<\/div>\n\n<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
FN18-12 and FN18-24 indoor high voltage load break switches are air insulated medium voltage switch disconnectors designed for switchgear, RMU, and transformer protection applications.<\/p>\n
Featuring puffer-type arc extinguishing technology, fuse combination options, and compact modular construction, they provide reliable switching performance for 12kV and 24kV distribution systems.<\/p>","protected":false},"featured_media":1945,"template":"","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"FN18-12 FN18-24 Indoor High Voltage Load Break Switch and Fuse Combination","_seopress_titles_desc":"FN18-12 and FN18-24 indoor high voltage load break switches with fuse combination for 12kV and 24kV power systems. Equivalent to ABB NAL\/NALF load break switch with reliable arc extinguishing performance.","_seopress_robots_index":""},"product_brand":[],"product_cat":[46],"product_tag":[],"class_list":{"0":"post-1942","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-high-voltage-disconnect-switch","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.wolunelectric.com\/ru\/wp-json\/wp\/v2\/product\/1942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wolunelectric.com\/ru\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.wolunelectric.com\/ru\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wolunelectric.com\/ru\/wp-json\/wp\/v2\/media\/1945"}],"wp:attachment":[{"href":"https:\/\/www.wolunelectric.com\/ru\/wp-json\/wp\/v2\/media?parent=1942"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.wolunelectric.com\/ru\/wp-json\/wp\/v2\/product_brand?post=1942"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.wolunelectric.com\/ru\/wp-json\/wp\/v2\/product_cat?post=1942"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.wolunelectric.com\/ru\/wp-json\/wp\/v2\/product_tag?post=1942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}