HMNS low voltage draw-out power distribution switchgearExtraction type low volta
HMNS low-voltage draw-out switchgear is a new generation of low-voltage switchgear developed by huanghua group co., LTD according to the market demand.Product technical standards meet IEC439 "low-voltage complete switch equipment and control equipment", GB7251 "low-voltage complete switch equipment" and other standard requirements.

HMNS low-voltage extractor switchgear is suitable for power conversion, distribution and control of power distribution equipment in power system with rated working voltage of 660V and below, which is used in power plants, substations, petrochemical, metallurgical, steel rolling, light industrial and textile enterprises, residential areas, high-rise buildings and other places.



  HMNS 型低压抽出式开关柜是黄华集团有限公司根据市场需求而开发的新一代低压开关柜。 产品技术标准符合IEC439《低压成套开关设备和控制设备》、 GB7251《低压成套开关设备》等标准要求。

      HMNS型低压抽出式开关柜是适用于发电厂、 变电站、 石油化工、 冶金轧钢、轻工纺织等厂矿企业和住宅小区、高层建筑等场所, 作为交流 50-60Hz,额定工作电压交流660V及以下的电力系统的配电设备的电能转换、 分配及控制之用。
Ambient air temperature is not higher than +40℃, not lower than 5℃, and its average temperature within 24h is not higher than +35℃;


Atmospheric conditions: clean air, phase zhou humidity in the highest temperature for +40℃ not more than 50%, in the lower temperature allowed to have a higher relative humidity, such as +20℃ for 90%, but should consider the temperature change, may occasionally produce condensation;


Altitude less than 2000m;


The device is suitable for transportation and storage at the following temperature: 25℃ to +55℃ range.It can reach +70℃ for a short time (no more than 24h). The device shall not suffer any unrecoverable damage at these limiting temperatures and shall work normally under the above conditions.


Delta if the above use conditions cannot be met, should be negotiated by the user and the manufacturer to resolve;


Additional technical agreements are required for use on offshore oil drilling platforms and nuclear power plants.




△周围空气温度不高于+40℃,不低于 5℃,并且24h内其平均温度不高于+35℃;

△大气条件:空气清洁,相纣湿度在最高温度为+40℃时不超过50%,在 较低温度时允许有较高的相对湿度,例如+20℃时为90%,但应 考虑到温度变化,有可能会偶然地产生凝露;


△本装置适应于以下温度的运输和储存过程: 25℃至+55℃的范围之间。短时间内(不超过24h)可达+70℃,在这些极限温度下装置不应遭到任何不可恢复的损伤,而且在以上条件下应能正常工作;


△当本装置使用于 海上石油钻采平台和核电站时,应另行签订技术协议。


(1) Electrical performance 660V
Rated insulation voltage 380V,660V
Rated working voltage 5000A
Maximum operating current of main bus 100KA
Main bus rated to withstand current 220KA
Main bus rated peak withstand current 1000A
Maximum working current of distribution bus (vertical bus) 80KA
Distribution bus (vertical bus) peak current: 105KA(Max.)
Standard type 176ka(Max.)
Enhanced type  
(2)Protection grade  
Meet IEC529, DIN40050 standard  
IP30 protects solids greater than <1>2.5mm  
IP40 protects solids greater than <1>1.0mm  
IP54 protects against dust and random spray  
(the protection level of IP54 should be negotiated with the manufacturer)