MCH（MNS）系统是采用标准模件由工厂组装的低压抽出式开关柜装置，符合IEC60439-1、GB7251.1、JB/T9661等低压电气标准。适应于交流50（60）Hz、额定工作电压≤660V、额定电流5500A以下的供配电系统中，作为电能分配、转换、控制和无功功率补偿之用。

MCH（MNS）低压开关柜包括固定技术和抽屉技术。骨架及内部安装件均可采用敷铝锌板加工；产品技术先进、性能可靠，已经广泛应用于电力、石油、化工、冶金、市政建设、建筑等领域。

主要结构特点：

1、骨架采用优质的冷扎钢板或进口的敷铝锌钢板折弯而成，按E=25MM 模数作为最小基本单位，用8.8级自攻锁紧螺钉，组装成各种柜形结构和功能单元。

    1） 设计紧凑：以较小的空间能容纳较多的功能单元。

    2） 结构通用性强，组装灵活：以25 mm为摸数的C型型材能满足各种结构形式、防护等级及使用环境的要求。

    3） 采用标准模块设计：分别可组成保护、操作、转换、控制、调节、测定、指示等标准单元，用户可根据需要任意选用组装。以200余种组装件可以组成不同方案的柜架结构和抽屉单元。

2、防护等级

产品外壳防护等级：IP3X（标准型）、IP31、IP4X、IP43、*IP5X、*IP54（*因防护等级过高，应与制造商协商）

3、抽屉单元

抽出式开关柜宽度为1000、800和600；抽屉单元安装总高度为72E（E=25mm），每柜最多可装36个抽屉单元；双面操作柜最多可装７２个抽屉单元。

抽屉单元有7种类型：8E/4、8E/2、8E、16E、24E

基本技术参数:   

Shandong Huineng Electric Co., Ltd, located in the "ancient capital of Qi"-Zibo City , is a innovative growth enterprise which has leading products of high-low pressure electric complete set of equipments and integrated scientific research and development , production and operation and technical service. Built in Aug, 2003, up to now,the company has completed 75 million yuan of registered capital, and over one hundred million yuan of fixed assets; it has more than 280 employees, among which above 80% employees with education background of technical secondary school above. Over the years, based on the concept to pursue excellence and the spirit of open innovation, it devotes itself to providing high-quality product and service to SGCC and broad users' projects and increasingly develops into the well-known enterprise in manufacturing industry of electric equipments in complete set in China.

Since the establishment of company, it has continuously established power transmission and distribution engineering and technological research center of Zibo City through close cooperation with Xi'an High-voltage Electrical Appliance Institute, Shandong University of Technology, Schneider (China) Electric Company and many scientific research institution, universities and colleges and multinational corporations, promoted the technology level and internal quality of products, and gradually realized the product structure pattern of "No one I have and I have excellent" covering extensive fields, which greatly enhances the core competence of enterprise.

The company always persists in taking quality control as center, positively integrates with the international advanced quality control modes, takes the development road of quality and benefit, establishes a whole set of perfect quality control system, successively gets ISO9001：2008 quality authentication certificate and "3C" certificate for low voltage product, as well as the first to pass electric energy product authentication in the same industry in China.

The company has excellent processing equipments, advanced production process and complete detection facilities. Since 2004, it has successively invested heavily to introduce numerical control press, numerical control plate shears, numerical control bending machine, full-automatic numerical control busbar processing machine and other CNC machining equipments with world leading level, built up 800m2of three-dimensional material warehouse, and two production lines for VS1 and ZN85 breaker. It firstly sets up the product partial discharge test room in the same industry in China, which promotes the equipping level of enterprise and increasingly enhances the vitality of sustainable development of enterprise.

For years, with product marketing of company being continuously strengthened and expanded, it successively provides the first digital substation--Tianjin Chenfu 220KV substation, Tianjin Lutai 500KV switching station project, power company limited of northern Hevei province, Jiangsu electric power company, China Petroleum Pipeline Bureau, Shengli power station and other major projects and users in China with high-quality products and service and wins universal praise.

The fittest Survives in market competition. At present, facing to the new opportunities and new challenges brought by state smart grid, we will continuously focus on clients, strive to explore the best management mode suitable to features of our company, reinforce standardization operation and sincerely cooperate with vast customers depending on reliable quality, the price with competitive power and perfect after-sales service to make positive contribution to the development of electric power of China.