Development of building electrical technology?

The following is the related contents of building electrical technology brought by Zhong Da Consulting for your reference.

The development of building electrical technology is synchronized with the development of building technology and electrical technology. Especially with the development of information technology such as computer technology, control technology, digital technology, display technology, network technology and modern communication technology, building electrical technology has made great progress. Since the reform and opening up, China has conducted extensive technical exchanges with the international community, and many advanced new products and technologies have continuously entered the construction market in China, which has made the building electrical industry step onto a new stage.

The development of building electrical technology is synchronized with the development of building technology and electrical technology. Especially with the development of information technology such as computer technology, control technology, digital technology, display technology, network technology and modern communication technology, building electrical technology has made great progress. Since the reform and opening up, China has conducted extensive technical exchanges with the international community, and many advanced new products and technologies have continuously entered the construction market in China, which has made the building electrical industry step onto a new stage.

At the end of 1970s, the construction industry was one of the pillar industries in China, and the building electrical specialty was in a state of no standards, no scientific journals, no professional societies, no scientific research institutions and no information exchange, which was extremely disproportionate to the development of the national economy. If the above problems of building electrical specialty are not solved, it will inevitably drag the construction industry back. After just a few years, this situation has greatly improved. Colleges and universities set up basic courses related to building electricity in electrical automation specialty; The Academic Committee of Architectural Electricity of China Architectural Society was established, and the national technical cooperation and information exchange network of architectural electrical design was established. The magazine "Building Electricity" was published, and the Technical Specification for Building Electrical Design was also promulgated in 1983. It laid a solid foundation for the future development of building electrical design and became the driving force to promote the synchronous development of the building industry.

On this basis, various provinces and cities have set up corresponding academic institutions, which have made positive efforts for the development and progress of building electricity in this region. Through the introduction and exchange of new technologies in building electrical design, it provides an effective way for the training and professional improvement of the majority of on-the-job technicians.

With the deepening of reform and opening up, international technical exchanges and cooperation have become more and more frequent. Since Nanjing Jinling Hotel opened the first joint design of high-rise buildings at home and abroad in the late 1970s, a number of high-rise buildings have been built in Guangdong, Shenzhen, Shanghai and Beijing. Some are cooperative designs, and some are independently completed by domestic design units. During this period, the majority of design units felt the rapid development of building electrical technology, which we never expected after so many years of closed doors. We can review the situation of the construction industry in the early days of reform and opening up. The state regards the coastal cities adjacent to Hong Kong and Macao as the window of reform and opening up, and architectural design institutes in many provinces and cities across the country regard opening branches and companies in coastal special zones as the window to understand new technologies. This measure really played a very good role at that time, which allowed us to further see our own gap and gradually understand the development of foreign building electricity. Through communication with foreign counterparts, new products and technologies have been introduced and applied in the field of architecture. It promotes and accelerates the progress of building electrical technology in China. After years of development, under the impetus of capital construction, building electrical technology has been fully developed throughout the country. Especially from 65438 to 0992 after Comrade Xiaoping's southern tour speech, the situation of national capital construction lasted for more than ten years, which made the world-famous building electrical industry continue to develop at a high speed and made great progress.

Building electricity includes strong current and weak current. The design contents of high voltage mainly include: power distribution system, power and lighting system, lightning protection and grounding system, etc. Generally speaking, the power distribution system in buildings mainly includes: high and low voltage systems, transformers, standby power supply systems, etc. Power system mainly includes power system distribution and control; Lighting system includes indoor and outdoor lighting; Lightning protection grounding system includes lightning wave intrusion prevention, lightning induction prevention, grounding, equipotential bonding, local equipotential bonding, auxiliary equipotential bonding, etc. In this short period of more than 20 years, the technology and products of these systems have undergone tremendous changes, and many design concepts have also undergone tremendous changes. For example, in the high-voltage switchgear of high-voltage system, the first circuit breaker used was oil circuit breaker, and later it gradually developed into oil-free circuit breaker, which was not only bulky, but also non-fireproof. The configured high-voltage switchgear is huge and must be independently set in its own compartment, occupying a large building area. The vacuum circuit breaker and SF6 circuit breaker used now are not only small in size and high in short-circuit capacity, but also the cabinet size is much smaller than the original cabinet. Because the circuit breaker has no oil, the fire protection performance is greatly improved, and it can be placed in a room with other low-voltage equipment, which not only saves space, but also facilitates management. Low-voltage circuit breaker has developed from large volume and small short-circuit capacity to large current, high breaking capacity, small volume and stable performance, which makes the system safer and more reliable and brings convenience to design. In recent years, low-voltage circuit breakers are developing in the direction of intelligence, and various parameters of circuit breakers can be directly transmitted to computers through industrial control buses.

The appearance of dry-type transformer brings great convenience to the electrical design of buildings. Because there is no possibility of fire caused by transformer oil leakage, it can be conveniently set inside the building and directly into the load center. In addition, the limitation of the capacity of the oil transformer in the building is eliminated, and the dry-type transformer in the building can adopt a larger capacity. Four 2500kVA dry-type transformers have been used in the design project.

The generator set used for emergency power supply has made great progress in both performance and volume. In addition to the diesel generator set used in the project, EPS can be used as emergency lighting, and UPS can be used for devices that allow millisecond power failure.

The control of power equipment has changed from single relay control to automatic control. In addition to the better performance and smaller volume of various components, the control box is reduced, and more importantly, the controlled equipment is in the best control state due to the adoption of digital technology control, further achieving the effect of energy saving.

Lighting engineering has moved from the situation of single light source and low efficiency of light source and lamps to a broader prospect. At present, there are many kinds of building light sources to choose from. The light source is developing in the direction of high light efficiency, good light color and high color rendering index, and the lamps are constantly improving their efficiency and light distribution form to facilitate their application in various occasions. Accessories of light sources, such as ballasts for fluorescent lamps, have developed from ordinary inductive ballasts to energy-saving inductive ballasts and electronic ballasts, and electronic ballasts with low harmonics are produced according to the magnitude of harmonic components. Numerous light sources, fittings and lamps can meet the choice and design of designers and fully meet the lighting requirements of various buildings and places. Whether it is indoor work lighting or decorative lighting, whether it is outdoor lighting of roads and courtyards or floodlighting of buildings, it reflects the convenience and benefits brought by the development of lighting technology to architectural lighting.

In addition, other devices and equipment used in electrical design, such as dual power switch, have also moved from traditional products to professional production. Besides the conventional power supply switching, there are also products that can meet the mutual switching of dual power supplies of electronic equipment and can switch each other within the power supply cycle of 1/4, which greatly improves the reliability and continuity of power supply.

Power supply cables and wires are widely used in building electricity. Looking at the samples of cables and wires in the past, it seems that the varieties are relatively poor, but now, various cables are constantly being introduced, from ordinary PVC cables to flame retardant, fire-resistant, low-smoke halogen-free irradiation environmental protection cables; From ordinary insulating materials to mineral insulation; From ordinary insulated buses to enclosed buses, pre-branched cables and so on. These technologies provide a strong guarantee for the safety, reliability, convenience and environmental protection of building electricity.

According to the power distribution requirements of special buildings, some new equipment has also been widely used. For example, operating rooms in large hospitals adopt leakage protection and residual current monitoring systems in medical places.

The technical development of high-voltage system is obvious to all engineers and technicians, and we have experienced it personally. Such a huge development has laid a good foundation for building electrical construction in China, and also created conditions for safe use of electricity in buildings.

With the deepening of the application of building intelligent technology, the control of some equipment or systems is gradually monitored by professional control systems, and their communication protocols are open to the building equipment monitoring system to realize the interconnection between systems. For example, the electric power automatic monitoring system of a building adopts the field bus technology to realize data acquisition, processing and centralized monitoring, so as to realize remote measurement, remote adjustment, remote control and remote communication of the distribution system and realize unattended distribution station. The system can continuously collect and analyze, and give necessary tips or warnings in advance to facilitate the safe operation of the system. The power automatic monitoring system adopts computer technology, data processing technology, control technology, sensing technology, communication network technology and power electronics technology, which can basically replace the traditional secondary circuit and has the advantages of simple wiring, reliable performance and easy maintenance. At the same time, as the second largest energy-consuming equipment in buildings, the energy-saving control of lighting system has been paid more and more attention, and professional lighting control systems have been widely used in many buildings. The lighting control mode has developed from single timing switch control to real-time induction control and dimming control. In addition, various flexible control modes, such as scene control, remote control and field control, realize the comfort, functionality and humanization of the lighting system, and at the same time save energy to the maximum extent.

For example, the Code for Fire Protection Design of Buildings (GBJL 6-87) compiled in the late 1980s; Standard for Lighting Design of Civil Buildings in 1990s (GBJL 33-90); Code for Electrical Design of Civil Buildings (jj/16-92); Lighting design standard for industrial enterprises (GB 50034-92；; ); Code for fire protection design of high-rise civil buildings (GB 50045-95); Code for design of power supply and distribution system (GB 50052-95；); Code for design of l0kV and below substations (GB 50053-94); Code for Design of Low Voltage Distribution (GB 50054-95); Code for Distribution Design of General Electric Equipment (GB 50055-93); Code for lightning protection design of buildings (GB 50057-94), etc. It provides a basis for building electrical design and a solid step towards building electrical standardization.

In the late 1970s, weak current systems were mainly telephone systems for voice communication and simple public address systems. In 1980s, with the application of TV antenna, automatic fire alarm system and building equipment monitoring system, the content of weak current system became more and more. Especially in the mid-1990s, with the application of integrated wiring technology in buildings, the design content of weak current system has gradually expanded from several systems to more than a dozen subsystems.

"Intelligent Building" began to appear in China, and has experienced nearly 20 years of development in China, which can be roughly divided into two stages: the first stage is from the late 1980s to the mid-1990s, which is a stage of exploration and practice, and the understanding of the concept, design concept and construction standard of intelligent building is still vague; The second stage is the stage of large-scale construction and rapid development from the middle and late 1990s to the present. After nearly ten years of practical application in the first stage, the industry and society have gradually become clear about intelligent buildings, from early blindness to returning to rationality and objectivity. The corresponding intelligent building technology and its application have also made great progress, and the design, construction and acceptance specifications of intelligent buildings and related laws and regulations have been gradually established and improved. By the end of 1990s, the construction of intelligent buildings in China gradually embarked on a healthy and orderly development track. Entering the 2 1 century, with the development of social informatization, intelligent building system has become an indispensable infrastructure in many buildings, and the team of intelligent building design and system integrators has been expanding, which has developed into a new force in the construction industry, and the supporting product manufacturing industry has also developed towards localization and industrialization, giving architecture a brand-new concept.

Since 1996 1 Ministry of Construction held the first national seminar on intelligent buildings in Shanghai, China's intelligent buildings have made great progress. This meeting formed an objective understanding from the definition, concept, construction standard and technical application of intelligent building system, and put forward that we should treat the construction and development of intelligent building rationally, which played a positive role in the popularization and application of intelligent building technology. Intelligent buildings have gradually expanded from commercial buildings developed by real estate developers to public buildings such as government offices, hotels, commercial buildings, hospitals, banks, securities, libraries, museums, exhibition centers, terminal buildings, and gradually extended to residential quarters.

In order to strengthen the management of intelligent building engineering design, standardize engineering design and ensure the quality of engineering design, the Ministry of Construction issued the Interim Provisions on the Management of Intelligent Building System Engineering Design and 1997 and 1998 Regulations on the Management of Intelligent Building Design and System Integration Qualification. At the end of 1998, the Ministry of Construction issued the document 194, namely, the Notice on Establishing Special Qualification for Engineering Design and System Integration of Building Intelligent Systems and its annex, Qualification Standard for Engineering Design and System Integrator of Building Intelligent Systems, which are the market qualifications for participating in intelligent design and contracting, and have aroused great repercussions in the building intelligent industry. So far, more than 1000 design and system integrators have been allowed to enter the market. In order to assist government departments in the construction industry to provide corresponding management and technical support, under the leadership of the Design Department of the Ministry of Construction, the first Expert Committee on Intelligent Building System Engineering Design was established in June, 1998. On June 5438+ 10, 2003, the Committee of Experts was reorganized, and the head of the Ministry of Construction personally took the lead, and the Committee of Experts on Building Engineering Technology of the Ministry of Construction was established, among which the Committee of Experts on Building Intelligent Technology was one. As the consultant and assistant of the government, the expert committee assists the government in industry management and technical services, provides technical consultation for demonstration projects and pilot projects, and provides a basis for decision-making by leaders of relevant departments.

With the rise of intelligent buildings in China. There is an urgent need for relevant laws, regulations and standards as guiding technical provisions for design and construction. 1In March, 1995, the Communication Engineering Committee of China Engineering Standardization Association promulgated the Code for Design of Building and Building Integrated Wiring System. 1In July, 1995, East China Architectural Design and Research Institute compiled the first local intelligent building design standard in Shanghai. Subsequently, many provinces and cities in China also compiled their own intelligent building design standards. In July 2000, the Ministry of Construction issued GB/T 503 14-2000 "Design Standard for Intelligent Buildings". In February 2000, GB/T 503 1 1-2000 Code for Engineering Design of Buildings and Building Integrated Wiring Systems and GB/T 503 12-2000 Code for Engineering Acceptance of Buildings and Building Integrated Wiring Systems were officially promulgated. The formulation of these technical regulations has laid a technical foundation for the healthy and orderly development of intelligent buildings in China. In August, 2000, the Ministry of Construction revised and issued the Code for Lightning Protection Design of Buildings, focusing on the provisions on lightning protection and lightning pulse damage of a large number of electronic products in the weak current system of intelligent buildings. In 2004, the Code for Lightning Protection Design of Information Systems C-B 50343-2004 was promulgated.

In order to better connect with the design standards, evaluate the project quality fairly and objectively, and provide the basis for the quality acceptance of intelligent building projects, the Ministry of Construction promulgated GB/T 50339-2003 "Code for Quality Acceptance of Intelligent Building Projects" in July 2003. Therefore, all the important links from design, construction to acceptance have rules to follow.

Intelligent technology is just a means. Through the intelligent function configuration of buildings, it emphasizes high efficiency, low energy consumption and low pollution, and realizes the goals of saving energy, improving the use function of buildings, protecting the environment and sustainable development on the premise of truly realizing people-oriented. The implementation of architecture should proceed from the strategic height of sustainable development and pay attention to ecological and environmental protection, which is the eternal theme of sustainable development. Through years of practice, with a rational and pragmatic attitude, starting from the actual needs of the project, taking practicality and applicability as the standard, rather than blindly following the trend, we have unilaterally pursued the advanced nature and comprehensiveness of intelligent systems, and found the best intersection of advanced nature, reliability, rationality and economy according to the specific conditions of different projects in terms of use functions, investment standards and management requirements. This concept has become the * * of the intelligent building industry. With the development of intelligent building technology, architectural colleges and universities all over the country have set up corresponding professional courses for this technology and trained graduate students of related majors.

Up to now, thousands of intelligent buildings have been built in China, which has attracted the attention of the world architecture community. At the same time, China has also built a demonstration project of intelligent system in residential quarters. After the evaluation of the Science and Technology Development Promotion Center of the Ministry of Construction, a number of scientific and technological achievements of intelligent building technology which are actually used in the project and have the leading level in China have been passed.

Intelligent building technology is a multidisciplinary and cross-industry system engineering.

Building intelligent technology mainly includes: automatic monitoring system of building equipment, safety protection system, parking lot management system, automatic fire alarm and fire control linkage system, communication and computer network system, integrated wiring system, broadcasting system, cable TV system, digital conference and video conference system, system integration, etc. Domestic building intelligent technology has developed from independent subsystem to system integration.

(A) Construction equipment monitoring technology

In the 1980s, centralized computer monitoring was mainly used. Because of poor reliability and slow running speed, it was rarely used after 90' s, and it was replaced by distributed control. At the end of 1990s, with the development and combination of computer technology, control technology, network and communication technology, the monitoring technology of engineering equipment developed rapidly, which was highlighted as follows:

The architecture and reference model of 1. Fieldbus, the development platform and tools of application software and the application of Fieldbus have all made great progress, and Fieldbus technology has been widely used in engineering equipment monitoring system.

2. On the premise of in-depth study of network technology, real-time network operating system and reliability technology of control network, Ethernet control network appeared.

3. The integration of control network and information network has become a hot spot in the development of control network technology, and the integration technology of various building equipment monitoring systems and information networks is becoming more and more mature.

4. Various new control network technologies have been applied in the monitoring system of construction machinery. OPC technology, Web technology and TCP/IP in computer field are gradually integrated into building equipment monitoring system, which greatly promotes the development of building equipment monitoring technology.

(b) safety technology

Security includes CCTV monitoring, intrusion alarm, channel control (entrance guard), patrol, intercom, perimeter prevention and other subsystems. The security system has developed from the initial subsystem independence to the linkage between subsystems, which greatly improves the rigor, reliability and real-time performance of security and provides security for people's work, study and life. The CCTV monitoring subsystem has also developed from analog technology to digitalization, and the whole security system has also developed to scale, digitalization and integration.

(3) Communication network technology

The communication network in intelligent building includes computer network, two-way cable TV transmission network and telephone communication network. As the broadband backbone network of intelligent buildings, the first two networks concentrate almost all information application and information management resources and connect almost all user sites. Before the mid-1990s, all kinds of networks had certain markets and users, but in the late 1990s, Ethernet gradually occupied a leading position in all kinds of network communication technologies with its advantages of reasonable investment, flexible wiring, superior performance and convenient use and maintenance. The transmission rate of Ethernet has developed from the initial 10Mbps and 100Mbps to 1Gbps, 10Gbps or even higher. At present, the telephone network of intelligent buildings (including ISDN and XI)-SL) can be used not only for voice communication, but also for narrowband data communication such as data and images, so that people can realize functions such as video conference and telephone conference through the communication network. Access network technology is the key to the connection between intelligent building and external network, which makes the tangible world smaller and smaller and makes people's work and life change greatly. Intelligent buildings connected to MAN or Internet require higher and higher bandwidth to meet the increasing data communication needs of users. With the development of wired network, wireless network has entered a rapid development stage with its flexibility to connect people. From the initial 1 1M to 54M in 2003, it has now grown to more than100M, which provides great convenience for people's mobile internet access, has great development potential in many fields and is becoming the trend of network development.

(D) Integrated wiring technology

Integrated wiring is the basic platform for data, voice and multimedia communication in intelligent buildings. Since the technology entered the China market, it has brought a brand-new concept and new technology to the domestic intelligent building market because of its excellent performance, and immediately caused great repercussions in the construction industry, and was widely adopted by various intelligent buildings. In order to adapt to the development of network transmission bandwidth and speed, new products of integrated wiring emerge one after another, from the initial three-line, five-line to six-line, and even seven kinds of wiring system products ahead of the standard appear to meet the demand of gigabit networks. With the increase of network transmission rate, 10 Gigabit optical fiber network has been put into the market to adapt to its development, and new multimode and single-mode optical fibers will be widely used as good transmission media. The technology and products of copper cable are constantly updated, from three to five, over five, six or even higher, from copper cable to optical cable, which fully embodies the rapid development of Ting and the broad prospects of new technology application in intelligent buildings.

(5) System integration technology

Generally speaking, all subsystems in intelligent buildings are connected through their own networks, and the expected work is completed under their own operating stations, but they have not enjoyed the information resources. In order to realize convenient and fast management, information resources should be shared among subsystems and system integration should be carried out.

In the process of system integration, different system platforms, different network structures, different integration subsystems and different integration modes are selected. With the development of computer technology, network technology, control technology and display technology, engineering equipment monitoring system is connected with other subsystems through computer network, forming a system integration mode based on engineering equipment monitoring system. In addition, the system integration management network is established by integrating their own systems equally, and each subsystem is regarded as a lower-level field control network and integrated in an equal way. The real-time data of each subsystem is converted into a unified format through an open industrial standard interface and stored in a system integrated database or server. The system integrated management network realizes the unified management, monitoring and information exchange of each subsystem through programs.

System integration, using open protocol to realize linkage control and information sharing between related subsystems, improve management efficiency, improve the ability to deal with emergencies, and achieve the purpose of saving energy and manpower. This is the Building Equipment Management System (BMS). System integration is not an end, but a technical means to improve building use function and management efficiency. The content of integration is not as much as possible, but should be integrated on demand according to the needs of use and management on the premise of mature technology, reliable system, reasonable investment and efficient management.

(6) Intelligent residential quarters

In the 1990s, influenced by the international concept of intelligent residence and electronic residence, intelligent building technology gradually extended to residential quarters, and achieved initial results in a few economically developed coastal cities in China. Building intelligent technology began to develop from public buildings to residential buildings and residential quarters, and quickly extended to residential quarters, becoming an important market for the development of intelligent buildings. From the intellectualization of public buildings to the intellectualization of residential buildings, this is the demand of the market and the need of actual development. Design institutes all over the country put the intellectualization of residence in an important position, providing a platform for intellectualization, which is a frontier and challenging field in residential design. The development of intelligent technology in residential quarters can be summarized as follows: the system design emphasizes the people-oriented design concept, taking into account the convenience of residents at all levels, and handling the relationship between safety and comfort, advanced and practical, functional configuration and reasonable investment. The security system has developed from an independent security subsystem to a comprehensive security system combining family and community, technical defense and civil air defense. In terms of information communication, it has developed from a single broadband access mode to a multi-operator optional mode, and the broadband access network has developed from XD-SL and two-way cable TV networks to the establishment of community computer local area networks. The information and communication services available to community residents have expanded from a single broadband Internet access service to diversified value-added services on community local area networks. The application of automatic monitoring of mechanical and electrical equipment, remote transmission and reading of water and electricity meters, audio and video systems, information technology of property management and other systems has greatly improved the living environment and quality of life of residents in the community. With the application of smart home technology, community residents can truly experience all kinds of convenience and beauty brought by the information age, and the concepts of home office and network life can become a reality.

In order to guide the healthy development of intelligent residential quarters in China, the Housing Industrialization Promotion Center of the Ministry of Construction issued the Key Points and Technical Guidelines for the Construction of Intelligent System Demonstration Project in National Residential Quarters (Trial Draft) in February 1999, which made detailed provisions and requirements for the demonstration project. This has played a key role in standardizing the intelligent market of residential quarters and promoting the healthy and orderly development of intelligent construction of residential quarters. On this basis, the scheme of intelligent demonstration residential quarters is demonstrated to guide the healthy and orderly development of intelligent technology in residential quarters across the country. The intelligentization of residential quarters has developed rapidly in all parts of China, accounting for a considerable proportion of the total urban residential development in China every year, and has gradually become the mainstream of residential building development. On the basis of the national demonstration project of intelligent system in residential quarters, the Housing Industrialization Promotion Center of the Ministry of Construction issued "Key Points and Technical Guidelines for the Construction of Intelligent System in Residential Quarters" in February 2003 as the basis for the intelligent design and construction of residential quarters. This also shows that residential intellectualization has officially moved from demonstration project to comprehensive intelligent construction of residential quarters.

Due to the particularity of living environment and conditions in China, it is difficult to launch complete sets of products for intelligent residential quarters, which urges domestic product suppliers to develop a large number of products needed for intelligent residential quarters, thus forming a new intelligent building industry. Due to the entry of broadband network and the expansion of community scale, the concept of digital community has been put forward, which has pushed the development of intelligent residential quarters to a new stage.

The digital community has further strengthened the network function, and the local area network, wide area network and Internet broadband connection are complete. Through a complete network, we can realize the automatic intelligent monitoring of electromechanical equipment and household appliances in the community, as well as the automatic intelligent monitoring of security system. The application of modern sensing technology, digital information processing technology, digital communication technology, computer technology, multimedia technology and network technology in digital community has accelerated the speed of information dissemination, improved the performance of information collection, transmission, processing and display, and enhanced security. Digital community improves the integration of intelligent system, realizes the full enjoyment of information and resources, and improves the optimization degree of the system. Digital community is the unit node of digital city. The construction of digital community has created conditions for digital cities and laid a foundation for the application of technologies such as e-government, e-commerce and e-logistics.

The rapid development of intelligent building in China's construction industry has played a positive role in transforming and upgrading the traditional construction industry and improving people's living standards. The localization level of intelligent building products has gradually improved, breaking the situation that foreign products monopolize the domestic market through market competition.

After China's entry into WTO, the construction market has gradually become a completely open market. How to deal with the market competition of intelligent building needs to make the intelligent building industry move towards intensive development. Intensive can bring us huge economic benefits and greatly improve work efficiency. Therefore, this will be an important measure to improve the competitiveness of China's intelligent building market. The rapid and sustainable development of China's national economy, the enhancement of comprehensive national strength and the promotion of urban information construction have provided a strong guarantee for the development of intelligent buildings, and the development of intelligent buildings in China will also face broader prospects.

For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd