{"id":821,"date":"2021-04-27T06:35:41","date_gmt":"2021-04-27T06:35:41","guid":{"rendered":"https:\/\/www.wolunelectric.com\/?post_type=product&p=821"},"modified":"2026-05-14T14:37:12","modified_gmt":"2026-05-14T06:37:12","slug":"zn12-1240-5-12kv-40-5kv-indoor-ac-hv-vacuum-circuit-breaker","status":"publish","type":"product","link":"https:\/\/www.wolunelectric.com\/vi\/product\/zn12-1240-5-12kv-40-5kv-indoor-ac-hv-vacuum-circuit-breaker\/","title":{"rendered":"ZN12-12(40.5) 12kV 40.5kV indoor AC HV vacuum circuit breaker"},"content":{"rendered":"

 <\/p>\n

General Introduction:<\/strong><\/h2>\n

The ZN12-12(40.5) is a three-phase AC 50Hz indoor high-voltage vacuum circuit breaker, covering two voltage levels: 12kV and 40.5kV.<\/p>\n

It adopts advanced vacuum arc-extinguishing technology, which has the advantages of strong breaking capacity, long electrical and mechanical life, and no environmental pollution.<\/p>\n

It is mainly used for control and protection of power transmission and distribution equipment in power plants, substations, industrial and mining enterprises, and other places, and is especially suitable for occasions requiring frequent operation.<\/p>\n

 <\/p>\n

Working Conditions:<\/strong><\/h2>\n

1. Altitudel: 1000m;<\/p>\n

2. Ambient temperature: -25 ~+40 ;<\/p>\n

3. Relative humidity: daily average 95 , monthly average 90 ;<\/p>\n

4. Earthquake intensity: 8 degree;<\/p>\n

5. Applicable occasions should free from inflammables, explosives, corrosives and severe vibration.<\/p>\n

 <\/p>\n

\n

Model Interpretation<\/h2>\n
    \n
  • \n
    ZN<\/strong>: Vacuum Circuit Breaker<\/div>\n<\/li>\n
  • \n
    12<\/strong>: Design Serial Number<\/div>\n<\/li>\n
  • \n
    12(40.5)<\/strong>: Rated Voltage: 12kV \/ 40.5kV<\/div>\n<\/li>\n
  • \n
    Indoor AC HV Vacuum Circuit Breaker<\/strong>: The product is used indoors, suitable for AC high-voltage power systems, and adopts vacuum arc-extinguishing principle.<\/div>\n<\/li>\n<\/ul>\n

     <\/p>\n<\/div>\n

    Features:<\/strong><\/h2>\n

    1. The breaking capacity of the arc extinguish chamber is high, the current carrying capacity is low, and the electrical life is long.<\/p>\n

    2. layout is from front to back, simple and compact structure, complete operation and easy maintenance.<\/p>\n

    3. In order to structure and installation, they can be divided into: Horizontal fixed type, inclined fixed type, middle set movable type.<\/p>\n

     <\/p>\n

    Technical Specification:<\/strong><\/h2>\n

     <\/p>\n

    \n
    \n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n
    \n
    Parameter Name<\/div>\n<\/th>\n
    		\n
    Specification (12kV)<\/div>\n<\/th>\n
    		\n
    Specification (40.5kV)<\/div>\n<\/th>\n<\/tr>\n<\/thead>\n
    \n
    Rated Voltage<\/div>\n<\/td>\n
    		\n
    12kV<\/div>\n<\/td>\n
    		\n
    40.5kV<\/div>\n<\/td>\n<\/tr>\n
    \n
    Rated Frequency<\/div>\n<\/td>\n
    		\n
    50Hz<\/div>\n<\/td>\n
    		\n
    50Hz<\/div>\n<\/td>\n<\/tr>\n
    \n
    Rated Current<\/div>\n<\/td>\n
    		\n
    630A, 1250A, 1600A, 2000A<\/div>\n<\/td>\n
    		\n
    630A, 1250A, 1600A, 2000A<\/div>\n<\/td>\n<\/tr>\n
    \n
    Rated Short-Circuit Breaking Current<\/div>\n<\/td>\n
    		\n
    20kA, 25kA, 31.5kA, 40kA<\/div>\n<\/td>\n
    		\n
    20kA, 25kA, 31.5kA, 40kA<\/div>\n<\/td>\n<\/tr>\n
    \n
    1min Power Frequency Withstand Voltage<\/div>\n<\/td>\n
    		\n
    42kV<\/div>\n<\/td>\n
    		\n
    95kV<\/div>\n<\/td>\n<\/tr>\n
    \n
    Lightning Impulse Withstand Voltage (Peak)<\/div>\n<\/td>\n
    		\n
    75kV<\/div>\n<\/td>\n
    		\n
    185kV<\/div>\n<\/td>\n<\/tr>\n
    \n
    Operating Mechanism<\/div>\n<\/td>\n
    		\n
    Spring Energy Storage Type (AC\/DC Dual-Use, Manual Optional)<\/div>\n<\/td>\n
    		\n
    Spring Energy Storage Type (AC\/DC Dual-Use, Manual Optional)<\/div>\n<\/td>\n<\/tr>\n
    \n
    Mechanical Life<\/div>\n<\/td>\n
    		\n
    \u226510,000 Times<\/div>\n<\/td>\n
    		\n
    \u226510,000 Times<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

     <\/p>\n<\/div>\n<\/div>\n

    \n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    S\/N<\/th>\nItem<\/th>\nUnit<\/th>\nData<\/th>\n<\/tr>\n<\/thead>\n
    1<\/td>\nRated<\/p>\n

    voltage<\/td>\n

    		kV<\/td>\n12<\/td>\n<\/tr>\n
    2<\/td>\nRated insulation level<\/td>\n1 min power<\/p>\n

    frequency<\/p>\n

    withstand<\/p>\n

    voltage<\/td>\n

    		42<\/td>\n<\/tr>\n
    Lightning<\/p>\n

    impulse<\/p>\n

    withstand<\/p>\n

    voltage<\/td>\n

    		75<\/td>\n<\/tr>\n
    3<\/td>\nRated frequency<\/td>\nHz<\/td>\n50<\/td>\n<\/tr>\n
    4<\/td>\nRated current<\/td>\nA<\/td>\n6301250<\/p>\n

    1600<\/td>\n

    		12501600<\/p>\n

    2000<\/p>\n

    2500<\/p>\n

    3150<\/td>\n

    		12501600<\/p>\n

    2000<\/p>\n

    2500<\/p>\n

    3150<\/td>\n

    		20002500<\/p>\n

    3150<\/p>\n

    4000<\/td>\n<\/tr>\n

    5<\/td>\nRated short circuit breaking current<\/td>\nkA<\/td>\n20\/25<\/td>\n31.5<\/td>\n40<\/td>\n50<\/td>\n<\/tr>\n
    6<\/td>\n4s short time withstand current<\/td>\n20\/25<\/td>\n31.5<\/td>\n40\/3s<\/td>\n50\/3s<\/td>\n<\/tr>\n
    7<\/td>\nRated short circuit making current (peak)<\/td>\n50\/63<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n<\/tr>\n
    8<\/td>\nRated peak withstand current (peak)<\/td>\n50\/63<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n<\/tr>\n
    9<\/td>\nBreaking times of rated short circuit breaking current<\/td>\ntimes<\/td>\n50<\/td>\n30<\/td>\n<\/tr>\n
    10<\/td>\nMechanical life<\/td>\n10000<\/td>\n6000<\/td>\n<\/tr>\n
    11<\/td>\nClosing time<\/td>\nms<\/td>\n\u226475<\/td>\n<\/tr>\n
    12<\/td>\nOpening time<\/td>\n\u226465<\/td>\n<\/tr>\n
    13<\/td>\nPhase center distance<\/td>\nmm<\/td>\n210\u3001230\u3001250\u3001275<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    <\/h5>\n<\/div>\n<\/div>\n
    \n

    <\/h4>\n

    <\/h4>\n

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    <\/h4>\n

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    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n

    <\/h4>\n
    \n

    Product Advantages<\/h2>\n
    Reliable Breaking Performance<\/strong>: Adopting vacuum arc-extinguishing technology, there is no oil leakage, explosion or other potential safety hazards. The chopping current is low, which can effectively protect the power equipment from overvoltage damage.<\/div>\n
    Flexible Operation<\/strong>: Equipped with spring energy storage operating mechanism, which supports AC\/DC power supply and manual operation. It is fast in action, stable in performance, and suitable for frequent operation scenarios.<\/div>\n
    Easy Maintenance<\/strong>: The product has a simple structure, few wearing parts, long service life, and no need for frequent maintenance. It can reduce the maintenance cost and improve the operation efficiency of the power system.<\/div>\n
    Wide Application<\/strong>: It is widely used in power plants, substations, industrial and mining enterprises, high-rise buildings, and other power distribution systems. It can be used for switching on and off the power supply, and protecting transformers, motors, capacitors and other equipment.<\/div>\n
    <\/div>\n<\/div>\n

    Outline Dimension<\/strong><\/h2>\n

    \"ZN12<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

    ZN12-12(40.5) is a 12kV\/40.5kV indoor AC high voltage vacuum circuit breaker with vacuum arc extinguishing structure. Featuring reliable breaking performance, long service life and low maintenance, it is widely used in power plants, substations and industrial high-voltage distribution systems.<\/p>","protected":false},"featured_media":823,"template":"","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"ZN12-12(40.5) Indoor AC HV Vacuum Circuit Breaker 12kV 40.5kV","_seopress_titles_desc":"Professional ZN12-12(40.5) indoor AC high voltage vacuum circuit breaker, 12kV & 40.5kV available. High breaking capacity, durable spring mechanism, for power substation & industrial switchgear.","_seopress_robots_index":""},"product_brand":[],"product_cat":[44],"product_tag":[61],"class_list":{"0":"post-821","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-vacuum-circuit-breaker","7":"product_tag-indoor-vacuum-circuit-breaker","9":"first","10":"instock","11":"shipping-taxable","12":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.wolunelectric.com\/vi\/wp-json\/wp\/v2\/product\/821","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wolunelectric.com\/vi\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.wolunelectric.com\/vi\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wolunelectric.com\/vi\/wp-json\/wp\/v2\/media\/823"}],"wp:attachment":[{"href":"https:\/\/www.wolunelectric.com\/vi\/wp-json\/wp\/v2\/media?parent=821"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.wolunelectric.com\/vi\/wp-json\/wp\/v2\/product_brand?post=821"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.wolunelectric.com\/vi\/wp-json\/wp\/v2\/product_cat?post=821"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.wolunelectric.com\/vi\/wp-json\/wp\/v2\/product_tag?post=821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}