1) The main transformer and bushing Lead Fault.
2) to protect the failure of the s econdary line.
3) current transformers are open or shorted.
4) The main transformer internal fault.
It is reported that until 2010, China\\ s \"973 Program\", \"863\" Project, the major national science and technology projects, the National Natural Science Foundation of Science and Technology program in the field of LED lighting, new energy, new materials, b iological resources and environment were focus on the deployment to provide strong scientific and technological support for industrial development.
To actively cultivate the market, our organizations have implemented energy-saving Huimin, 10000 10 City 10 City, one thousand, Golden Sun, a major demonstration project, the promotion of energy-saving air-conditioning for more than 30 million units, more than 360 million energy-efficient cars, energy efficient motor 400 more than one million kilowatts, 160 million energy-saving lamps, more than 1.6 million LED lights, the pilot run various types of electric vehicles, 14000 343, the construction of photovoltaic power generation project.
Last year approved the release of more than 90 national standards for the field of strategic emerging industries. Among them, electric vehicles, triple play, Internet of Things, LED lighting and other standards have been the standardization pilot
In related news, it is estimated that one hundred million 2011 LED chip supply by about 1,000, while the chip demand is about 89 billion, the oversupply ratio of 12%; 2012 in mainland China production capacity of the release of a large number of expected ove rsupply ratio will be expanded to 21%.
Although the chip supply, but the status of each product line, strong demand for ultra-high brightness LED, and less able to supply vendors, so the supply and demand is fairly stable. Mainland China, although out of production capacity, but mainly in the low-level application projects, such as indoor display, flashlight, fluorescent, and other products.
Compared with conventional light sources, LED lights than the energy-saving lamp energy saving of 80%. A spherical 5-watt home led light bulbs, you can replace a 11 watt energy saving lamps, a 90-watt LED street lighting effect is equivalent to a 250-watt high pressure sodium lamp. Subject to the needs of the process, energy-saving lamp tubes containing heavy metals like mercury, once the tube is damaged, mercury into the environment, the environment and cause harm to humans. LED lights unlike the energy-saving lamps and mercury pollution, does not pollute the soil and groundwater, in line with the concept of energy saving and environmental protection.
The LED light source has the advantages of long life, 25,000 hours, the light fades, the brightness can still reach the traditional light efficiency of the new lamp. And household LED lamps flicker, no radiation, lead-free, mercury-free. LED lighting to open civilian market, the biggest obstacle is that it is higher than the people at affordable prices.
The biggest challenge in the current popularity of LED lighting is the price pressure, followed by units of lumens per watt. From the chip to all aspects of the package, you must take a variety of measures, such as adding a red crystalline powder, and the development of high-voltage LED, in order to achieve the purpose of reducing costs. Predicted that high-voltage LED will gradually become the mainstream market, 75W and 100W lighting alternatives will also be center stage. Has been hampered by the LED lighting products into the price of the general lighting field, is expected to be resolved within the next five years.
15, the cross-strait LED forum was held in Xiamen by National Semiconductor light emitting devices (LED) applications of Quality Supervision, Inspection and Testing Center, China has developed in the input current o f 20mA, the COB packaging mode up to 177 lumens / watt LED light source , marking the LED light source technology research and development has reached world advanced level.
According to reports, this world-leading level of the LED light source used the Hercynian Research Institute, Chinese Academy of Sciences and the Fujian Province IMC Optoelectronics Technology Co., Ltd. R & D MCOB package technology with independent intellectual property rights, high luminous efficiency of the three safety photoelectric Co., Ltd. Preparation chips and Preparation of Sichuan Sony light and efficient phosphor.
Peng Wanhua, secretary general of the Fujian optoelectronic industry associations, said that the success of R & D 177 lm / W LED light source has an important significance. "This means that China s packaging technology, chips and raw materials to reach the world advanced level. If the technology is used in lighting will greatly enhance the energy saving effect, the industry is conducive to better promote the industry upgrade." He Wenming said, IMC chairman, LED technology is evolving, higher luminous efficiency of LED light source is still further research and development.
LED light technology is basically to keep up with the advanced in the world, but its core technology of any LED giant dominated, and truly master the very few companies of the primary technology industry overall innovation capability needs to be improved.
LED industry in China faces many problems, such as their own hematopoietic capacity is seriously inadequate, as well as innovation capacity is not enough and lack of core competitiveness, making the LED lights of development is relatively slow. Second, policy support, LED lights enterprises at least thousands and most of their own way, national policy support can not do everything, weaker companies either rely on the integration to enhance the influence, or be drowned in the integration, coupled with technology on business with each other \"clone\" cause the market price of war and the norms of competitive behavior began to surface, the \"zero down payment is the price war in the region derived from a sales strategy.
2008 Beijing Olympic Games and 2010 Shanghai World Expo LED display brought more opport unities, but also opened up greater space for the development of the LED display industry. Promote low-carbon economy, building a harmonious green outdoor energy saving LED light strip will eventually sail, low-carbon pointing out the direction for the development of LED big screen.
1, box-type substation placed on the ground floor should be selected at a high place, not on the lower-lying areas to avoid the rai n poured inside the equipment operation. Pouring a concrete platform in the high and low pressure side of the left gap, to facilitate the laying of the cable into the outlet. Excavation of foundation in case of the litter or mulch piled on the ground must be dug when the real soil, then backfill and consolidate the good soil, then fill with concrete or ballast to ensure a stable foundation.
2, box-type substation grounding and neutral sharing a ground network. Grounding grid is generally the basis of the four corners of the playing ground piles, and then fused. Box-type substation grounding grid must have two reliable connection. Box-type substation operation, you should always check the grounding connections not loose, no rust. Periodic measurement of earth resistance value, the grounding resistance should be less than 4Ω.
3, the box-type substation natural air circulation cooling dominated. Therefore, around it is not illegal heap objects, especially in the transformer room door should not be blocked, but also often to remove the attachments on the shutters ventilation holes to ensure that all electrical equipment does not exceed the maximum allowable temperature.
4, low-voltage circuit breaker trip should check the cause of the trip before try to send. Sent to unsuccessful must be thoroughly to find the cause of the malfunction, rule out the transmission to prevent the accident.
5, box-type transformer high-voltage power distribution room shall be equipped with zinc oxide arrester, installed the way it must be easy to test and disassembly to replace.
6, the ring network switchgear, transformers, surge arresters and other equipment in high voltage electrical installations should be regular visits to maintenance, defects in a timely manner renovation, insulation preventive test on a regular basis. Box-type substation to disable more than three months, and then put into operation should be carried out before the full preventive tests.
7, the replacement of high-voltage fuse breaking capacity, the transformer must be power outages, the operation is necessary to correctly terminate the mechanical linkage, and use insulated operating rod.
8, box-type substation into the cable outlet hole should be blocking to prevent small animals causing the accident.
9, must have a number of high-voltage warning signs of dangerous and electrical equipment nameplate.
Introduction: 2012 is the year of the past and of the \"12th Five-Year Plan is to build cultural industries, cultural power, and build a harmonious society crucial, as the smooth convocation of the\" two sessions \", the spirit of the meeting will be China\\ s cultural The development of the cause to bring new ideas, new direction, advertising media as part of the cultural industries will take the \"spring\" usher in a new atmosphere.
In February 2012, the warm spring breeze pregnant with new vigor and vitality in this cozy incomparable day, ushered in the world\\ s most influential, the highest level of advertising industry event, one of the \"China (Guangzhou) International Advertising logo Exhibition \"grand carried out, this exhibition highlight the application to the theme of\" green \"advertising the new darling â"€ â"€ the LED. Spring was warm, but, according to senior advertising: large LED screen in the spring did not come, most of the operators is still sorrow unbearable, feel cold.
It is reported that in recent years, LED large-screen status quo is not optimistic, whether it is investment operations, or post-market are eye-popping, 2011, media companies, operating LED screen, regardless of profit or not, it is fortunate, get through a year\\ s electricity shortage in the apprehension among the yet to usher in the outdoor hard-line policy means, However, in 2012? With the successful convening of the \"two sessions\", in order to implement the two sessions spirit, outdoor policy will no doubt be around in the development of low-carbon economy, promote advanced culture, and building a harmonious outdoor above practice implementation, whereby the high energy consumption, low efficiency, and clip LED big screen with the light pollution and high operating costs, waiting for it will be fate? is an outdoor rectify the Great Purge, or continue to suffer from the high cost of commercial electricity expens es? if the 2012 Outdoor really start a new round of high standards of construction, then, the ad is \"what is to save your LED screen \"?
Most large LED screen operators have yet to find a proven profit model, in which media companies have up to 90% in the non-profit stage, LED large screen low-margin, high-input, post-investment is difficult is has become the norm. What is more, will face the loss or loss. Remembrance of the decade from 2002 to 2012, China\\ s outdoor advertising by \"staking their claims, the capital catalytic impact of blowing the tide of the LED large screen, LED outdoor big quickly became popular to be hailed as a\" star \", springing up into the blowout times media companies have also launched the \"diva\", but the late advertisers do not buy, the market dropped, investment enthusiasm and market returns are lower than expected, followed by the value of the bubble began to emerge in the electricity shortage, high operating costs of multiple under pressure, the profits and added value of the LED large screen almost down to freezing point, numerous media companies are forced into a reshuffle, the integration phase, the number of operators down the drain, after the experience of the 2011 integration, shuffle, outdoor big screen investment operation followed more rationally, in order to comply with the market development, and deepen the value of the media, the LED screen urgent need to open up a value type and scale to the \"pioneer\" road to cope with the future development of the outdoor advertising variables.
LED large screen of them struggling with the thorny \"three big mountains\"
Electricity shortage, high operating costs, post-investment difficult currently plaguing the development of LED big screen three big mountains, under the combined effect of the three mountains, most of the big-screen operators are in dire straits, survived the 2011 electric the context of the shortage crisis, however, the conventional LED large screen since the energy has not yet made any substantial, not scattered in the electricity shortage haze, investment profits smoke and mirrors, operating costs continue to climb, LED big era will be how to deal with ? in outdoor media advocacy \"low efficiency, landscaping green\" high-energy LED screen will finally go from here?
Electricity shortage sounding the alarm in May last year, in October the Toden again Ruqierzhi, \"electric tiger\" energy-intensive industries talking crazy, some areas, giving priority to the protection of residential electricity, have been carried out so that electric power rationing and other measures traditional LED screen per square ranging from 400-600 watts of power consumption, plus the number of kilowatts of cooling air conditioning, limited power, off the air on the blacklist, \"the list\" Not only that, from 2011 gradually the incandescent gradually withdraw from the market move can be seen, high energy consumption products in the promotion of low carbon economy today, it will be difficult to settle down, Once upon a time, the incandescent lighting in the area all-powerful, now, with the advent of new LED and other energy-efficient lighting products , but overshadowed by the same LED big nowadays remarkable, and perhaps one day due to energy consumption, electricity shortage, or an alternative product of the advent of the outdoor policy then tough, LED large screen step \"incandescent\" footsteps was forced to withdraw from the market or shuffle? Hopefully, in the outdoor policy \"shuffle\" before their investment is already full recovery.
According to the LED industry analyst, LED outdoor screen can be profitable, the key lies in the operational and post-investment, as we all know, LED large screen in the hundreds of millions, the cost is extremely expensive, plus a large amount of money bid from advertising, the initial investment up to millions, even tens of millions to tens of millions of large sums of upfront investment in, can not help but to ongoing operational burden, in addition to high heat and air conditioning expenses, hundreds of watts of power consumption per square, as well as high maintenance, cleaning, etc. costs, so many operators stretched, after operating for some time tend to \"HOLD\" live light of cost recovery is a big problem, not to mention more profitable, which is currently the majority of operators in the \"diva\" after wringing the main reasons.
North, wide, deep front-line city has always been misappropriating large LED screen manufacturers and operators, enclosure, contested by relying on the many advantages, LED large screen operator Citylink Zhanbo, strong coverage, such as addicted to the head, packaging, sales advertising, a time of outdoor media into the \"buy\" the era of advertisers to carry large influx of capital, enables operators to pre-earned plate rolling in \"not bad money, even if the electricity, maintenance costs and then your also Kangde Zhu. LED large screen in which the lot is often the city\\ s bustling \"Golden Mile\", the pre-investment is generally no problem, advertisers are also very happy to put in, so blindly follow the trend and enter to buy the shopping era, advertisers flock, resulting in rapid increase in the number of ads, operators hope to see more customers, profits are also rich, but for advertisers, advertisers too much, making a single client display time and frequency along with reduce the impact on advertising effectiveness, is likely not before the arrival of the advertising cycle, the audience left the advertising radiation zone, and then lost the meaning of ads, such as banking, real estate, telecommunications and other large customers want to advertising to achieve all-weather cover, LED video ads a few seconds, fleeting, difficult to demonstrate a full range of its style, is too restrictive, therefore, such as real estate, Bainaohui such customers, due to the early lack of practice, will generally select the LED video media, but later began to return to the rational view of the ineffective advertising, in turn prefer to choose the print media, and never enter the LED video media, the continual loss of customers, while the operating costs of the large screen and high Finally, its operating pressure can be imagined, from the initial \"not bad money, and later sent t he money\".
On the other hand, the traditional LED display in the pre-investment process is not a lack of customer, 8 to 10 clients can easily operation, after looking forward to after the advertisers return to the rational, advertising began to oversupply, and finally leaving only 3-4 customers the opportunity to display and frequency of advertisers to enhance, but the operator can not find balance, because only three percent of the customers to make a profit only by raising prices to recover costs and maintain their operations, advertising price increases, advertisers have to pay more than the original three times higher than the cost, this way, even to the last remaining 30% of customers began to shake.
New media, new profit model - Jin Danuo both sides turn the LED display
Jin Danuo both sides turn the LED display, which is an increase in the LED display on the basis of three sides of the screen turn transform function, two optimal combination, weaknesses, and make it on three sides over both grand and imposing, there are full-color LED display screen is majestic and magnificent, during the day for the three sides over the use of two of which face alternately flip, only 90 watts of power consumption per hour, both to avoid the traditional print ads dull and flat energy savings, the solution to a common electronic display electricity during the day a large amount of the effect of the problem of insufficient direct sunlight. Evening out of the third surface, a full-color LED display, making the effect of a more diversified form of expression, no air conditioning and human duty, the lowest power consumption per square meter, 55 watts, is the fifth of the traditional LED display one.
Jin Danuo both sides turn the LED display during the day is fixed two print ads, full color LED display by night, both to meet the full range of telecommunications, real estate and other large customers around the clock coverage requirements, but also a good way to serve video ads customers, two regular customers in the daytime, magnificent, advertising effectiveness, customers are willing to put in long-term, night LED video effects, not only can play video customers, but also assisted during the day customers do promotion, such as playing a corporate image film branding so as to achieve the multi-angle, to achieve the value of advertising effectiveness, flexible business model, making the post-investment risk, zero burden customers more flexibility to develop the advertising model to meet the needs of their own profits at the same time, better safeguard the interests of advertisers.
Compared with the traditional LED display, Jin Danuo both sides to turn the LED display investment operations more flexible, traditional LED display can only play video ads, for large customers who require all-day coverage, and often inaccessible to large the loss of customers on the large LED screen operators, not microvascular bleeding, but aortic rupture, if left uncorrected, the limitations of the traditional LED large screen forced Merchants difficult operating costs, advertising coverage, it will be difficult worthy negative situation, then, can not achieve win-win situation so that advertisers and customers.
Troops and horses, forage ahead, traditional LED big screen before in the investment must be bright screen operations, and operational costs are extremely high, smooth yet good investment, but thwarted would be a direct threat to the survival of the operators, while the gold Dano on both sides turn the LED display the greatest degree of development and utilization of limited space, so that the same position to achieve profits several times or even ten times the value-added. The same location, both on three sides over a fixed income, there are multiple customers of the LED display and optimized product portfolio to our customers a more flexible investment model, completely solved the problem of the customer post-operational investment.
Both sides of the low-carbon energy to turn the LED display to create a new concept of outdoor media value
Jin Danuo both sides turn the LED display during the day on three sides over the effect of just the motor in the far turn, each motor is only 90 watts of power; night the power consumption of 70 watts per square, which is equivalent to the same area of ??the LED electronic display sixth, or even lower than the power of the ordinary flat lighting at night, thus saving electricity this major addition, it is designed to achieve a remote transmission and control, automatic playback, Automatic Turning and other functions, saving the cost of manual and configuration of the engine room, not only that, the product has been the State Intellectual Property Office issued a patent for design LED display module mask with dust-proof function, LED display during the day hidden in the back of the billboard, effectively reducing the LED display module dip the probability of dust, from customers each year tens of thousands of clean-up costs of th e LED display.
Jin Danuo turn on both sides of the LED display, for example, compared with the same area, with traditional LED display pixel, Jin Danuo both sides to turn the LED display to save electricity more than $ 300,000 the entire! Minimize operating costs during the day for three sides over the use of LED display actual working hours per day up to more than seven hours, the savings in electricity much more than this. Its unique mode of operation, to avoid the LED display to work long hours to accelerate the decay of electronic components aging and greatly extend the life of the screen body. If the existing traditional LED display is replaced by for Jin Danuo both sides to turn the LED display, saving four million kwh per year, equivalent to a small town with electricity, while reducing carbon dioxide emissions by about 50,000 tons, not only conforms to the requirements of the Government\\ s low-carbon energy-efficient, more effective to circumvent the power, limited electricity a nd the electricity shortage and impact.
Jin Danuo both sides turn the LED display with low-power, high-yield many advantages for the user to save a lot of expenditure, to make the user more flexible investment pricing; no air conditioning and a special duty to save operating costs, thus ensuring maximum profit margins ; unit modular design for easy maintenance, no need to be cleaned regularly. Jin Danuo both sides to turn the LED display also has the super structure of the wind, strong winds from the three prismatic gap and the patented design of the louvres backplane through to minimize wind resistance, to ensure the security of the high altitude. New forms of performance, ultra-low operating costs, rock-solid quality, makes the user more flexible investment strategy to meet the needs of their own profits at the same time, and better safeguard the interests of advertisers, good cooperation to achieve win-win situation situation.
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