HIMA Z7系列卡件Z7306、Z7138、Z7127、Z7126、Z7116

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HIMA  Z7系列卡件Z7306、Z7138、Z7127、Z7126、Z7116HIMA  Z7系列卡件Z7306、Z7138、Z7127、Z7126、Z7116HIMA  Z7系列卡件Z7306、Z7138、Z7127、Z7126、Z7116HIMA  Z7系列卡件Z7306、Z7138、Z7127、Z7126、Z7116HIMA  Z7系列卡件Z7306、Z7138、Z7127、Z7126、Z7116

一、用于实现各种运动控制

PLC控制器是一种具有微处理机的数字电子设备，用于自动化控制的数字逻辑控制器，可以将控制指令随时加载内存内储存与执行，可编程控制器由内部CPU，指令及资料内存、输入输出单元、电源模组、数字模拟等单元所模组化组合成。PLC控制器可以用于圆周运动或直线运动的控制，如今主要的PLC控制器产品几乎都有运动控制功能，它运用在各种机械、机床、机器人、电梯等场合。

从控制机构配置来说，早期直接用于开关量I/O模块连接位置传感器和执行机构，现在一般使用专用的运动控制模块，如可驱动步进电机或伺服电机的单轴或多轴位置控制模块。

二、实现工业的过程控制

 

作为工业控制计算机，PLC控制器能编制各种各样的控制算法程序，完成闭环控制，在工业过程控制中，PLC主要是对温度、压力、流量等模拟量等参数进行闭环控制。大中型PLC都有PID模块，PID调节是一般闭环控制系统中用得较多的调节方法，目前许多小型PLC控制器也具有此功能模块。

三、实现相关的数据处理

现代的PLC控制器具有数学运算、数据传送转换等功能，可以完成数据的采集、分析及处理；这些数据可以与存储在存储器中的参考值比较，完成一定的控制操作，也可以利用通信功能传送到别的智能装置。在大型的控制系统，如无人控制的柔性制造系统中，PLC控制器是核心部件之一。

四、PLC通信和物联网

工业物联网大势所趋，未来PLC通信和物联网的相关技术将备受欢迎。通常的PLC控制器通信含有PLC控制器间的通信及PLC控制器与其它智能设备间的通信。随着工控自动化的发展，各PLC控制器厂商都十分重视PLC控制器的通信功能，纷纷推出各自的网络系统，新的PLC控制器都具有通信接口，通信非常方便。

PLC技术在工控和物联网市场大有可为

未来PLC技术的三大特点

1、微型化、集成度越来越高：随着市场对微型、集成度的要求，PLC技术更多的集成到工业、汽车、通讯等产品当中。PLC产品的特性是控制和数据处理，在满足功能的同时，工艺上的要求也更加精细化。

2、智能PLC技术：随着AI技术的发展，更多的产品被赋予智能功能，PLC也不例外。如应用在工控的PLC的智能I/O模块和汽车上的智能温度控制模块等，未来智能PLC技术还将有更多的应用场景。

3、多样化的PLC技术：其中包括与PLC相关的编程语言和工具，随着应用场景的深入，一种或几种编程语言是无法实现所有的功能，定制化的PLC产品会增加，PLC模块化的技术也会增多。

中国的PLC市场潜力巨大

如今PLC技术发展迅速，据统计，全球约有三百多PLC生产厂家、五百多种PLC产品，美国、欧洲、日本是主要的生产地，市场份额超六成。美国有A-B公司、通用电气、莫迪康；德国的西门子、AEG公司；法国的TE公司；日本的三菱、欧姆龙、松下等均是著名的PLC供应商。

近年来，随着国家和企业的重视，我国的PLC行业保持高速增长，国内也诞生了台达、汇川、合信、亿维，科威和利时等有一定影响力的企业。据相关数据显示，2017年我国 PLC 市场规模百亿元，预计2018年将保持20%的增长率。国内的PLC产品具有非常好的性价比和服务，这给它们带来了良好的口碑和市场。

 随着电气化程度的不断提升，铁路已经被重塑为可持续和节能的交通方式。ABB在华积极参与各地轨道交通建设，为交流/直流变电站、客运站房建筑、控制和信号装置、隧道、机车车辆提供坚实可靠的电力保证，推动省际和城际间的互联互通，成功项目包括京沪高铁、青藏铁路以及北京、上海、广州、长沙等众多轨道交通项目。作为ABB Ability™ Building Ecosystem建筑生态系统的一部分，“新建筑生态系统”合作伙伴计划为商业建筑领域从事可持续发展、能源管理和脱碳解决方案的供应商们提供了协作进入市场的途径。

2

“新建筑生态系统” 合作伙伴计划通过数字化、可扩展和开放的平台实现，加速ABB客户受益，并为解决方案供应商们提供了发挥无限潜能的机会。

3

合作伙伴计划将通过最大限度地提高能源效率和可持续化解决方案，对环境产生积极影响。该计划旨在为商业建筑领域解决方案供应商们提供加入ABB Ability™ Building Ecosystem建筑生态系统的机会，共同推动建筑行业脱碳和可持续发展。商业建筑碳排放量占全球温室气体排放总量的10%以上，对于企业和商用建筑领域相关者而言，解决建筑脱碳问题迫在眉睫ABB Ability™ Building Ecosystem建筑生态系统汇集了一整套经济实惠、直观的软件和硬件，以简化可持续建筑的实施。这个开放平台为客户提供了跨系统的全局视角，从而更好地帮助使用者做出决策，同时该平台还兼具系统互操作性和可扩展性。

合作计划成员将有机会在ABB开放式建筑操作系统（ABB openBOS）的基础上进行构建。ABB开放式建筑操作系统能够处理复杂的集成任务并能帮助合作伙伴简化其解决方案的部署。“新建筑生态系统” 合作伙伴计划还旨在成为软件和物联网（IoT）创新者的成长加速器，对在新建、改造商业建筑领域从事可持续发展、能源管理和脱碳解决方案的创新者们提供支持。“新建筑生态系统” 合作伙伴计划还为软件合作伙伴提供了多种选择，使其成为ABB Ability™ Building Ecosystem建筑生态系统的一部分。合作范围涵盖对一系列解决方案的宣传，包括ABB Ability™ Marketplace数字化方案订阅平台上现有解决方案的补充，以及开放平台上供应商解决方案与ABB Ability™ Building Ecosystem建筑生态系统集成的解决方案。

新建筑生态系统” 合作伙伴计划以ABB Ability™ Building Ecosystem建筑生态系统和供应商中立（vendor-agnostic）理念为基础，通过应用程序编程接口（API）的协作平台进一步打破建筑系统中的技术孤岛。每个合作伙伴关系将通过采用降低成本和对环境产生积极影响的技术，最大限度地提高能源效率，促进可持续发展。共同推动建筑行业脱碳和可持续发展。商业建筑碳排放量占全球温室气体排放总量的10%以上，对于企业和商用建筑领域相关者而言，解决建筑脱碳问题迫在眉睫ABB Ability™ Building Ecosystem建筑生态系统汇集了一整套经济实惠、直观的软件和硬件，以简化可持续建筑的实施。这个开放平台为客户提供了跨系统的全局视角，从而更好地帮助使用者做出决策，同时该平台还兼具系统互操作性和可扩展性。

合作计划成员将有机会在ABB开放式建筑操作系统（ABB openBOS）的基础上进行构建。ABB开放式建筑操作系统能够处理复杂的集成任务并能帮助合作伙伴简化其解决方案的部署。“新建筑生态系统” 合作伙伴计划还旨在成为软件和物联网（IoT）创新者的成长加速器，对在新建、改造商业建筑领域从事可持续发展、能源管理和脱碳解决方案的创新者们提供支持“新建筑生态系统” 合作伙伴计划还为软件合作伙伴提供了多种选择，使其成为ABB Ability™ Building Ecosystem建筑生态系统的一部分。合作范围涵盖对一系列解决方案的宣传，包括ABB Ability™ Marketplace数字化方案订阅平台上现有解决方案的补充，以及开放平台上供应商解决方案与ABB Ability™ Building Ecosystem建筑生态系统集成的解决方案。ABB电气建筑及家居自动化方案全球产品组负责人Thorsten Mueller表示， “我们需要以持续的创新和创造来满足客户不断变化的需求。“新建筑生态系统” 合作伙伴计划体现了我们对商业建筑行业数字化转型和脱碳思考方式的转变。它强调了ABB对协作、开放和供应商中立（vendor-agnostic）未来的承诺。该合作伙伴计划，将见证商业建筑领域最具创新性和可持续发展解决方案技术供应商们利用ABB Ability™ Building Ecosystem建筑生态系统形成的规模和商业机会。这将有助于加速减少新建建筑及改造建筑的能源消耗。”ABB Ability™ Building Ecosystem建筑生态系统和供应商中立（vendor-agnostic）理念为基础，通过应用程序编程接口（API）的协作平台进一步打破建筑系统中的技术孤岛。每个合作伙伴关系将通过采用降低成本和对环境产生积极影响的技术，最大限度地提高能源效率，促进可持续发展。

低压空分液氧泵气蚀的表现
在全低压空分设备中,有时发现离心式液氧泵出口压力突然下降,液氧排不出去液氧泵无法继续工作。常常称此现象为“带气”,这种液氧泵“带气”的现象,专业术语叫做“汽蚀”。2液氧泵产生气蚀现象的原理
因素一、当液体的压力低于相对应的饱和蒸气压力时,液体就要汽化。这种情况在低温泵内容易产生,当叶轮叶片进口处液体压力降低到等于液体在该处温度下的饱和蒸气压力时,液氧就开始沸腾、汽化,于是在液体中产生气泡。夹带着气泡的液体沿叶轮离心力方向流动,当它到达叶轮内压力升高的区域时(即气泡外面的压力高于相应的汽化压力区域)、蒸气又重新冷。由于气泡外面的压力很大,故在气泡凝结时,周围的液体以很高的速度冲向气泡所占有的空间,在该区域叶轮的表面上产生局部冲击作用(即发生强烈的水击现象)。这就是通常所称的液氧泵的汽蚀现象。因素二、当主冷凝蒸发器压力降低或液氧进口过滤器堵塞、进口管道阻力增加时,也可能发生汽蚀现象。
3液氧泵汽蚀的危害性。
汽蚀对液氧泵的影响随着它的程度不同而有差别。当汽蚀程度不严重时,其影响不大。如果汽蚀达到一定程度,工作轮叶片进口处产生的气泡很多,这些气泡随着液体进入压力高的地方(工作轮出口处)又凝缩成液体,气泡即迅速破裂。由于气液的密度差几百倍,当液氧凝缩时,体积突然缩小,周围的液体以很高的速度冲向气泡位置,使与气泡相接触的叶轮表面受到猛烈冲击。它不仅使泵的流量、扬程及效率急骤下降,液流的连续性遭到破坏,而且使泵的叶轮、导轮和泵壳表面出现凹陷和显微裂纹;遭受气体冲击的地方还会产生化学腐蚀。因此要全力避免液氧泵出现汽蚀现象。
4避免气蚀现象发生的考虑
为了避免歧视现象的发生，常常使液氧在进泵时有一个过冷度,以减少泵内液体汽化的可能。如果提高液氧泵的进口压力,就提高了液氧的饱和温度,使液氧有一定的过冷度。一般是降低液氧泵的安装位置,以提高液氧泵的进口压力(即使液氧进口处有一定的静压头),同时使过冷度提高(设计时考虑过冷度为6℃~10℃)。例如,主冷凝蒸发器液氧的压力为0.04MPa时,其饱和温度为94K,当液氧泵进口压力由于液柱的静压而增加为0.09MPa时,其饱和温度为97K,相当于液氧获得了3℃的过冷度。此外,在操作中也应加以注意:液氧吸附器在启用前应彻底预冷,直至放出液体时为止;在关闭其旁通阀时不要操之过急等等。汽蚀现象一但产生,则应立即排气,以保证液氧泵安全运转。为了提高液氧泵的抗汽蚀能力,在结构上目前均采用在工作轮前面安置螺旋式或轴流式诱导轮的方法“外去中间商，内去隔热墙”。这是张瑞敏对于组织结构调整的简短概括，隔热墙就是中层管理者。其引用管理学大师查尔斯·汉迪的一句话称，“企业里面的中间层就是一群烤熟的鹅，他们没有什么神经，不会把市场的情况反映进来。按照海尔的规划，去年和今年海尔总计裁员在2.6万人左右。

　　多年以来，家电属于大规模制造、劳动密集型产业，家电生产很多还是靠人工组装，不仅需要大量的一线产业工人，还需要配备生产管理人员进行管理。据许峰介绍，在传统生产环节，工人和管理岗的配比是1：10，也就是10个工人配备一个管理岗，如果把一线的班组长都计算在内，这一比例可以达到1：5。此前在自动化程度比较高的行业，比如汽车和快消品，一个工人可能就管理一条线，管理人员也大幅降低，1：20的管理岗比例是常见的配备水平。

　　如今家电行业面临的转型升级需求，不仅仅是海尔，包括格力、海信等家电企业纷纷投入大量资金进行自动化改造。对于企业来讲，这或许是降低成本、提升效率的优化结果。但是对于员工来讲，今年的饭碗明天就可能被“优化”掉，这不仅仅是一线产业工人面临的现实，也包括管理层。据许峰介绍，在生产制造环节，一般来讲，最先被挤掉的是普通产业工人，然后依次是普通技术工人、高级技术工人、技术人员管理者。

转型也要注入“新血”

As the naming partner of ABB FIA electric formula world championship, abb not only supports its global events, but also works together to break gender barriers and support women's development. Before the race, abb released the latest video of the "driving force" series - "girls on track". Daniela Lu, head of ABB electric equation cooperation project ž Anin and Hannah brown, the director of electric equation, discussed the impact and significance of the project in the video, and shared the original intention and vision of ABB's cooperation with electric equation to support the project. Motorsport combines the dual elements of sports and technology. Only by combining superb driving skills with rich engineering and technical experience can drivers gallop on the track. With the help of the highlight platform of racing cars, the "girls on the track" project encourages more young women to approach exciting racing sports, understand the complete ecosystem inside and outside the track, and then join the stem (Science, technology, engineering, Mathematics) field to explore a broader development space in the future. ABB opened a new global innovation and training park for mechanical automation in bekale, Austria, which is one of the largest integrated production, R & D and training bases in Central Europe.

The new park is ABB's global R & D Center for machinery and factory automation, artificial intelligence and software solutions. The global innovation center has significantly expanded its links with machinery manufacturers, manufacturers, start-ups, research and education institutions.

ABB has opened a new global innovation and training park at its headquarters in bekale (its global machinery and factory automation center) in eggelsberg, Austria. The new park will create up to 1000 additional high-tech jobs, including world-class R & D laboratories and global training facilities that can provide training for up to 4000 people per year in cooperation with universities. ABB invested 100million euros to expand its headquarters in bekale. The innovation of the Park focuses on artificial intelligence, machinery and factory automation, and will play an important role in releasing the potential of future industrial production - in the fields of electronics, electric transportation, food and beverage, environmental protection, logistics, agriculture and so on. They will improve productivity and flexibility, help customers become more sustainable, and bring production closer to their end markets. The new park expands the total area of its headquarters to more than 100000 square meters, making it one of the largest integrated production, R & D and training bases in Central Europe, with about 2400 employees at present. The expansion will also make room for additional capacity expansion to meet the growing demand for baccalais products. This is a decade of transformation to robotics and automation, because our customers need to cope with global labor and supply shortages, consumers have accelerated their demand for personalized products, and enterprises need more sustainable operations. ABB's new park will serve as a customer collaboration center, where we work with customers around the world to help them cope with these trends and support baccalais to become the preferred partner for the world's most ambitious industrial automation projects.

ABB research shows that in Europe and the United States, 8 out of 10 companies plan to further automate, and 7 out of 10 companies plan to reshape their production. The global potential market size of machinery and factory automation is currently estimated to increase from $20billion per year to $31billion per year by 2030.

ABB acquired baccalais in 2017, becoming the only company that can provide industrial automation customers with complete integrated hardware and software solutions around control, drive, robotics, sensor analysis and electrification. ABB innovation and training park will be an open innovation center. Here, baccalais will work closely with international customers, companies, start-ups and research and education institutions from the region to jointly develop automation solutions and cultivate talents needed by future factories.

With the construction of the new park, baccalais also launched a new brand logo, establishing a visual connection between baccalais and abb. "Our new visual design emphasizes ABB's firm commitment to the sub brand of baccalais, and demonstrates the strength of baccalais and ABB in the process of our joint development and cooperation. We become a member of this larger family, creating many new possibilities for each employee to actively shape their career," theis said.

As part of its 2030 sustainability strategy, abb expects to be carbon neutral in its own operations over the next decade. In bekale, abb installed one of Austria's largest self generating photovoltaic power systems. The additional photovoltaic modules in the park now increase the total power generation to 1.8 MW. The self use rate is about 98%. Begalay was founded by Erwin bernecker and Josef Rainer in 1979 and is headquartered in eggelsberg, Upper Austria. Today, baccalais is the world's leading solution provider in the field of machinery and factory automation. It is also the global ABB mechanical automation department in ABB's robotics and discrete automation business. Overall, ABB's robotics and discrete automation business has more than 11000 employees in more than 100 locations in more than 53 countries.

ABB has been operating in Austria for more than 110 years and has a proud history in Austrian industry - from electrification to railways, from supplying power to ski lifts to robots and process automation. In 2017, abb acquired bekale, making it the largest industrial automation supplier in Austria. Pm511v16 3bse01181r1 is a high-performance programmable controller, whose speed, capacity, performance and function have reached a new level. ● CPU, power supply, input and output integration, built-in high-speed processing and positioning functions. Pm511v16 3bse01181r1 input and output can be expanded to 384 points at most. Powerful expansion functions can be realized through function expansion board and special adapter. I/o acquisition module is adopted. The module can be installed near the sensor end and connected with PLC through a group of communication lines, which not only saves the cost of wiring, but also saves the i/o points of PLC itself. If the field budget of pm511v16 3bse01181r1 is limited, it is obviously more economical to use i/o acquisition module. Modular structure, providing 14 to 128 point input / output range, and can also add extended special function modules (such as analog input / output). The pm511v16 3bse01181r1 transistor output type has two 100kHz pulse sequences for servo positioning applications.

IRB 260 robot is mainly designed and optimized for packaging applications. Although it is small and can be integrated into compact packaging machinery, it can meet all your requirements in terms of reach distance and payload. With abb motion control and tracking performance, the robot is very suitable for flexible packaging systems.

Strong reliability &mdash& mdash; IRB 260 robot with long normal operation time is designed based on IRB 2400 (with more than 14000 installed) which is the most widely used industrial robot in the world.

Fast &mdash& mdash; Short operation cycle time the robot is optimized for packaging applications and equipped with ABB's unique motion control function, which greatly shortens the packaging cycle time.

High accuracy &mdash& mdash; The production quality of parts is stable. The robot has extremely high accuracy. Coupled with ABB's excellent conveyor belt tracking performance, its picking and placing accuracy is first-class whether it is in fixed position operation or in motion operation.

Powerful &mdash& mdash; Wide range of application the robot is optimized for packaging applications, with small size, fast speed and a payload of up to 30kg.

Rugged &mdash& mdash; Suitable for harsh production environment, suitable for harsh environment applications, and the protection grade reaches IP 67.

Good versatility &mdash& mdash; Flexible integration and production the robot is light in weight and low in height, which is easy to be integrated into compact packaging machinery. It has been optimized according to the packaging application, which is the inevitable choice of robot automation. Equipped with a full set of auxiliary equipment (from integrated air and signal system to gripper), abb packaging software pickmastertm can be used together. The mechanical integration is simple, and the programming is very convenient.

In 1974, ABB (then known as Asea) introduced the IRB 6, the first fully electric robot. Today, ABB has nearly 30 models of robots that meet the production needs of a wide range of industries, supported by powerful system integration capabilities and a global sales and service network in 53 countries. Recently, abb signed a supply agreement with Aker solutions, the leader of sustainable energy solutions, to provide major electrical, automation and safety systems for the northern lights project in Norway. Aker solutions is the EPC contractor of the project. The project is the first industrial carbon capture and storage project jointly constructed by Norwegian national oil company equinor, shell and total energy. It aims to develop an open and flexible infrastructure to safely store carbon dioxide emitted by European industry. The first phase of the project is planned to be completed in the middle of 2024, when 1.5 million tons of carbon dioxide will be permanently stored every year, and the storage capacity of the second phase of the project will be expanded to more than 5 million tons per year. ABB's automation, electrical and digital solutions will be an important part of the aurora borealis project to help the new carbon capture terminal achieve remote operation and ensure efficient operation of the facility. With ABB's industry-leading distributed control system ABB ability ™ With the system 800xA, operators will be able to have a clearer understanding of the operation of the aurora borealis storage facilities. The real-time and historical data analysis capabilities provided by ABB system can instantly present the operation data and KPIs of the plant, so as to help operators make more accurate and wise decisions and choose the best asset and process performance optimization scheme. Abb is not only the market leader of distributed control system, but also our long-term trusted partner. It has a comprehensive understanding of our business and expertise in land, sea and seabed projects. This is our key consideration in selecting suppliers. We must entrust important remote operations to partners with rich successful experience in reliability and performance optimization, so as to lay a solid foundation for this important development plan.

In order to achieve 1.7 billion tons of carbon dioxide capture by 2030 and achieve net zero emissions by 2050, industrial carbon capture and storage capacity is undoubtedly crucial in view of the current inability to curb industrial carbon emissions. Aurora Borealis is a significant development plan, which not only helps to rebalance the carbon cycle, but also demonstrates the spirit of innovation. We are delighted to participate in this inspiring project and contribute to a safer, smarter and more sustainable future. The special transport ship will transport the captured and liquefied carbon dioxide from the emission site to the aurora borealis Ø ygarden storage facility in western Norway, and conduct remote control through equinor's sture terminal facility located about 7 kilometers away. In order to realize remote operation, abb will establish an advanced extended operator workstation in the aurora borealis storage facility, which will work together with sture's central control room to significantly shorten the response time through seamless communication and provide 24/7 remote operation.

ABB will not only provide shore power solutions, but also deploy the main electrical system through the power process management system and the integration of high and low voltage switchboards and transformers to provide power support for the whole project. From July 7 to July 10, abb appeared at the first Xiamen International Red Power new grid equipment exhibition, bringing the world's leading digital distribution solutions. This exhibition focuses on building a tight circulation platform on the supply side and demand side of China's power and electrical industry, and jointly building a new power system with the upstream and downstream of the supply chain to help achieve the "double carbon" goal.

ABB showed its leading medium and low voltage distribution products and system solutions, including ABB unigear ZS1 500mm wide medium voltage air insulated metal enclosed digital switchgear, primegear zx0 environmentally friendly gas insulated switchgear, and neogear ™ Laminated busbar scheme low voltage switchgear, ivd4 ® Innovative products and solutions such as medium voltage intelligent solutions show ABB's leading technical support for achieving China's "carbon neutrality" goal. To achieve the goal of "double carbon", we need to build a new power system with new energy as the main body. Through the Multi Strategy precise tuning innovative solution of ABB zee600 smart energy management center, we can realize the flexible and precise regulation of "source network load storage", and create a green, low-carbon, strong, reliable, intelligent, efficient, safe and comfortable smart park. Through AI big data analysis and optimization and precise regulation and management, we can maximize the local consumption of clean energy, Improve energy efficiency and help achieve carbon emission reduction goals. ABB unigear ZS1 500mm wide switchgear, a complete set of power Internet of things solutions for medium voltage air insulated switches, is only 500mm wide, with withdrawable circuit breakers, which reduces the floor area by 25%, realizes the pre assembly of two sets and improves the efficiency of on-site installation. Using ABB ability ™ Cloud technology "cares" the health of equipment throughout its life cycle, and realizes the leap forward transformation from passive operation and maintenance and preventive detection to predictive maintenance.

ABB primegear zx0 is a 10/24kv environment-friendly digital gas insulated switchgear launched by ABB in the era of digital economy and double carbon based on mature technology and in line with the concept of modern green development. This product inherits the advantages of existing GIS products and has achieved new breakthroughs in environmental protection, safety, reliability, miniaturization and intelligence. The product can be widely used in residential power distribution, rail transit, commercial construction, industry, highways, bridges and tunnels and other fields. ABB NeoGear ™ Low voltage switchgear is a revolutionary innovation of ABB group. Latest neogear ™ The switch cabinet adopts the innovative four pole laminated busbar scheme, combined with abb ability ™ The connectivity and digital capability of the platform can reduce the occupied space by 25%, reduce the heating capacity by 20%, and reduce the operation and maintenance cost by 30%.

This switch cabinet also has a "higher level" safety design. The full insulation design ensures the safety protection of all live parts. The bus components used are 92% less than those of traditional switchgear, and the electrical connectors are 90% less. On the basis of reducing costs and improving the efficiency of operation and maintenance, make the switchgear more safe and become a power