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How to maximize the efficiency of your UPS

1.Use of AC voltage regulator After using UPS power supply, there is no need to add AC voltage regulator. If it must be added, it should be added to the front level of UPS, that is, the mains power first passes through the AC voltage regulator, then through the ups, and then to the load.

2.Battery balanced charging skills At present, valve regulated lead-acid battery (VRLA) used in many ups power supply is called maintenance free battery from the beginning, which gives users a misunderstanding that it seems that this battery is durable and does not need maintenance at all. Under this kind of misleading, many users have not carried out maintenance and management since they installed the battery. When the battery in UPS power supply meets the following conditions, the battery shall be charged evenly: when the terminal voltage is lower than the specified calibration voltage due to excessive discharge. For 12 V small sealed lead-acid batteries, the discharge calibration voltage is 10.5 V; for 24 V batteries, the final discharge voltage is 21 V; for 96 V batteries, the discharge calibration voltage is 85 v. The battery is not charged in time after discharge; the battery is idle for a long time. When the power supply is interrupted, the battery with continuous floating charge will release nearly half of its capacity.

3.Do not use diesel generators UPS should not be powered by diesel generator because its frequency is often unstable, which affects the normal operation of ups.

4.Pay attention to the safe operation of operators When connecting the output power supply to UPS, attention should also be paid to safety. Since the output voltage and current of ups are relatively large, it is necessary to pay attention to safety when connecting the output power supply to prevent the occurrence of electric shock accidents. When replacing the battery, turn off the UPS power supply and disconnect from the mains power supply. Use a screwdriver with insulated handle. Do not put tools or other metal objects on the battery. When connecting the battery cable, it is normal to have small sparks at the connector, which will not harm personal safety and UPS power supply. Do not short circuit or reverse connect the positive and negative electrodes of the battery. When replacing the battery, it is not suitable to replace it partly, but to replace it as a whole. In addition, it is forbidden to use batteries with different amperage and different brands.

5.Real time monitoring At present, all intelligent UPS have operability characteristics such as communication with microcomputer and program control. When the corresponding software is installed on the microcomputer and connected to UPS through serial / parallel port, the program can be used to communicate with ups. Generally, it has the functions of information inquiry, parameter setting, timing setting, automatic shutdown and alarm. Then, the UPS is connected to the computer through the special serial port control cable, and then through RS232 and RS485 protocol communication, the ups can automatically shut down when there is no mains power input and the power is low. It can monitor multiple UPS connected to multiple serial ports at the same time. Among them, through RS232 protocol, a serial port can only connect one UPS, through RS485 protocol, a serial port can connect 256 ups at most.

HP9335C Plus 10-30KVA High Frequency Intelligent UPS

1.True double-conversion 2.DSP technology guarantees high performance 3.Output power factor 0.9 4.Wide input voltage range (110-300 VAC) 5.Active power factor correction in all phases 6.50Hz/60Hz frequency converter mode 7.ECO mode operation for energy saving 8.Accepts dual-mains inputs 9.Emergency power off function (EPO) 10.Generator compatible 11.SNMP+USB+RS-232 multiple communications 12.3-stage extendable charging design for optimized battery performance 13.Adjustable battery numbers 14.Maintenance bypass available 15.Optional N+X parallel redundancy 16.Optional isolation transformer offers full isolation and complete common mode noise rejection

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126th Canton Fair

On Oct 15th 2019, as one of the most important trade promotion platforms for Chinese enterprises to expand the global market, Canton Fair in Guangzhou focused on highlighting innovation driven, and “independent brand” became a high-frequency word of Canton Fair.

Xu Bing, a spokesman for the Canton Fair and deputy director of the China Foreign Trade Center, said that the domestic and foreign environment faced by China’s foreign trade development this year is more complex and uncertain. The majority of exhibitors accelerated quality improvement and innovation, and continued to make efforts in technology research and development, product innovation, brand cultivation, etc., with high technology, high quality, high added value and independent brand products emerging.

Many independent innovative R & D products are welcomed by the market. At the same time, purchasers are less sensitive to price and pay more attention to the technology, brand, quality and service of products.

In this exhibition, Sorotec‘s products have attracted many customers and been widely praised. Especially Revo II. Revo II is a hybrid pure sine wave solar inverter. Its particular touch screen makes it more convenient to operate. It can parallel up to 9 pcs. The maximum power is 49.5KW. It has four working modes. Especially in the “Solar+AC” working mode, the solar and AC mains can charge the battery and power the loads together. It is the maximum use of the solar energy. The solar energy utilization is over 15% than other solar inverter. Revo series can start and work without battery, and also can work with lithium battery. This product has a strong comprehensive competitiveness.

Sorotec not only has the most advanced scientific research technology in the field. The products are of high gold content. And Sorotec is willing to accept and create new things. This has been unanimously recognized by all customers.

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Requirements of inverter for physical environment

Due to the high integration, compact overall structure and large heat dissipation, the hybrid inverter requires high temperature, humidity and dust content in the installation environment. When installing the solar inverter, it must provide a good operating environment for the inverter. The working ambient temperature of the inverter is rated at 40 ℃. If the ambient temperature is higher than 40 ℃ ~ 50 ℃, the rated current must be reduced. Otherwise, the temperature rise of the device will be too high, which will increase the possibility of device damage (especially IGBT power module), and have a great impact on normal and safe operation. If the working environment of the inverter fails to meet the requirements of the inverter on the working environment, it will cause high failure rate of the inverter, affect the long-term, reliable and safe operation, resulting in unnecessary economic losses. Therefore, the following matters should be paid attention to in the application of the inverter.

1.Operating temperature.

The inside of the inverter is a high-power electronic component, which is easily affected by the working temperature. The product is generally required to be 0-55 ℃, but in order to ensure the safety and reliability of the work, it should be considered to leave room for use, preferably controlled below 40 ℃. If the inverter is installed in the inverter cabinet, it shall be installed on the upper part of the cabinet and strictly comply with the installation requirements in the product manual. It is absolutely not allowed to install the heating element or the element easy to heat against the bottom of the inverter.

2.Ambient temperature.

When the temperature is too high and the temperature changes greatly, condensation is easy to occur inside the inverter, and its insulation performance will be greatly reduced, or even lead to short circuit accidents. If necessary, desiccant and heater must be added to the inverter cabinet. The surrounding humidity of the inverter shall be below 90%. If the surrounding humidity is too high, the electrical insulation will be reduced and the metal part will be corroded. If restricted by the installation site, the inverter shall not be installed in a place with high humidity, and the cabinet of the inverter shall be sealed as far as possible. In order to prevent condensation when the inverter stops, a convection heater should be added.

3.Corrosive gas.

If the concentration of corrosive gas is large, it will not only corrode the leads and printed circuit boards of components, but also accelerate the aging of plastic components and reduce the insulation performance. In this case, the inverter cabinet should be made into a closed structure and air exchange. There shall be no corrosive, explosive or combustible gas, dust and oil mist around the inverter. If there are explosive and combustible gases in the surrounding environment where the inverter is installed, there are relays and contactors that are easy to generate sparks in the inverter, so fire or explosion accidents may be caused sometimes. If there is dust and oil mist around the inverter, its adhesion and accumulation in the inverter will lead to the decrease of insulation; for the inverter with forced air cooling, the temperature in the inverter will rise abnormally due to the filter blockage, so that the inverter cannot operate stably.

4.Vibration and shock.

When the inverter cabinet is subject to mechanical vibration and impact, it will cause poor electrical contact. At this time, in addition to improving the mechanical strength of the inverter cabinet, away from the vibration source and impact source, the anti-seismic rubber pad shall be used to fix the inverter cabinet and electromagnetic switch and other components that generate vibration. The vibration resistance of the inverter should be different in different types. When the vibration exceeds the allowable value of the inverter, the fastening part of the components will be loose and the relay and contactor will act wrongly, which often leads to the unstable operation of the inverter. For the vibration situation that can be foreseen in advance, the vibration of inverter should be fully considered.

5.The altitude of inverter application is usually below 1000m.

If the altitude is high, the air pressure will be high, which is easy to cause insulation damage. In addition, the cooling effect of high elevation also decreases, so it is necessary to pay attention to the temperature rise of inverter.

REVO-II On/Off Gird Energy Storage Hybrid Inverter with Touch Screen

1.Touch screen display 2.PV and utility power take the load at same time(can setting) 3.Output power factor PF=1.0 4.On&Off Grid with energy storage 5.Energy generated record,load record,history information and fault record 6.Language and time setting 7.Structure with dust filter 8.AC charging and AC output time setting 9.Charging voltage and charging current timing 10.External Wi-Fi device optional 11.Parallel operation with up to 6 units only available for 3kW/4kW/5kW 12.Connected with battery optional 13.Wide PV input range 120-450VDC 14.Independent CPU 15.MAX PV Array power 4500W 16.Solar and Utility supply power to the load when solar power is not sufficient to load

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SOROTEC provides power support for the 7th Military World Games

SOROTEC GP9335C series online UPS adopt advanced intelligent design concept, and are successfully applied in military system, electric power industry, PetroChina system, medical field, banking system, chemical industry, rail transit, political and mining fields, large-scale events, etc., all of which are well received by users.The 7th Military World Games opened in Wuhan, Hubei Province on the evening of October 18, 2019. The Games will last 10 days from October 18 to 27, 2019. 

The 7th Military World Games is the first comprehensive international military sports event hosted by China, with the largest scale in the past and the largest international sports event held by China after the Beijing Olympic Games. 9308 military athletes from 109 countries will compete and enhance friendship in Wuhan. As the host country, China has set up a sports delegation of 553 athletes, the largest in the history of our country.

It’s a great honor for soled to participate in the power security system of the games. SOROTEC GP9335C series online UPSprovides power support for Wuhuan sports center.

During the military games, SOROTEC sent many engineers to the venue all day, recording the ups operation status in detail, ensuring that the power supply system is uninterrupted for 24 hours, providing stable, safe and reliable power support for the venue.

SOROTEC GP9335C series online UPS adopt advanced intelligent design concept, and are successfully applied in military system, electric power industry, PetroChina system, medical field, banking system, chemical industry, rail transit, political and mining fields, large-scale events, etc., all of which are well received by users.

SOROTEC GP9335C 10-800KVA Low Frequency Online UPS

■Use advanced 6th generation DSP and full digital control technologies to realize higher system stability. ■Output power factor is 0.9, carrying capacity than conventional UPS with 10% above, as users reduce investment cost. ■Advanced distributed active parallel technology can realize parallel operation of 6PCS UPS units without the need of centralized bypass cabinet. ■6-inch extra large LCD that can display 12 language ( Chinese ,English,Russian,Spanish,French and so on). ■Extra wide input voltage and frequency range make it adapt to severe power grid environment. ■Intelligent battery management maintains battery automatically to prolong the battery life. ■Standard input/output filter improves the system EMC performance. ■Extra strong capability to withstand output overload and short circuit, ensuring the system stability and system safety under extreme conditions. ■Layered independently-sealed ventilation channel and re-dundant fan, circuit boards with protective paints and a dust filter embedded make it highly efficient to dissipate heat and protect the product effectively under severeenvironment.

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Matching between Generator Set and UPS

Manufacturers and users of UPS power supply system have long noticed the matching problem between generators and UPS, especially the harmful effects of current harmonics generated by rectifiers on power supply systems such as voltage regulators of generators and synchronous circuits of UPS. Therefore, the technicians designed the input filter and applied it to UPS, and successfully controlled the current harmonics in UPS application. These filters play a key role in UPS compatibility with generators.

In fact, all input filters use capacitors and inductors to absorb the destructive current harmonics at the UPS input. The design of the input filter takes into account the percentage of all possible harmonic distortion inherent in the UPS circuit and at full load. Another benefit of most filters is to increase the input power factor of UPS with load. However, another consequence of the application of input filters is to reduce the overall efficiency of UPS. Most filters consume about 1% UPS power. The design of input filters has been seeking a balance between advantages and disadvantages.

In order to improve the efficiency of UPS system as much as possible, UPS engineers have recently improved the power consumption of input filters. The improvement of filter efficiency depends largely on the application of IGBT (Insulated Gate Transistor) technology to UPS design. The high efficiency of IGBT inverters leads to the redesign of UPS. The input filter can absorb some current harmonics and a small part of active power. In short, the ratio of inductance factor to capacitance factor in the filter is reduced, and the volume of UPS is reduced and the efficiency is improved. The compatibility between UPS and generators is another problem.

MPS9335C 10-300KVA High Frequency Online Modular Type UPS

1.Superior energy saving and environment-friendly: Efficiency > 96% at 50%-75% rated load, and > 95% at 25% rated load; Input PF > 0.99,input THDi<3%. 2. Superior capability of powering load: Output PF is 0.9 or 1, no need of power deration with load of leading or lagging PF. 3. Easy-to-install: Top or bottom cabling, no need of input cabling cabinet. 4. Easy-to-maintain: Full front access, UPS, failed part can be replaced shortly. 5. Easy-to-modify: The number of battery cells can be configured flexibly, so the original batteries can be used when modifying the legacy system; moreover, the battery cell can be replaced in time when it fails without interrupting the normal operation of UPS. 6.6-inch extra large LCD that can display 12 language (Chinese ,English ,Russian, French ,Spanlish and so on). 7.Provide large LCD touch screen (optional). 8.Each UPS modules provide 4.5KW charge capacity. equivalent to 10 to 12A. 9.On-Line Double Conversion, fully isolating the influences of power grid pollution and power failure from utility power supply and diesel generator to load. 10. Advanced DSP full digital control technologies realize higher system stability, online capacity expansion and maintenance. 11.Advanced distributed active parallel technology realizes parallel operation of 4 UPS units and online capacity expansion without centralized bypass cabinet. 12.Digital load sharing technology features extra low cross current and extreme high system reliability in parallel operation. 13.Adaptive to severe power grid environment due to extra wide input voltage and frequency ranges. 14.Extra strong capability to withstand output overload and short circuit, ensuring the system stability and system safety at limit conditions. 15 Intelligent battery management maintains battery automatically to prolong the battery life. 16. Efficient heat dissipation and effective protection under severe environment due to its independent layer-sealed ventilation channel and redundant fan design, as well as the paint-protected circuit boards and built-in dust filter. 17.Applicable voltage south America.

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Power Supply Requirements of 5G power system for 5G Communication Base Station

Chinese traditional industries are becoming increasingly mobile and data-based, and domestic information construction will be in a high growth trend for a long time. In this context, UPS as a power supply infrastructure will be more and more used in emerging industries, especially 5G power system, new energy, transportation, electricity, health and other industries will become a new demand growth point.

In the process of modernization, intellectualization and convenience of communication, finance, medical treatment, education, scientific research, manufacturing and other industries, all kinds of global top-notch equipment and systems appear centrally. 5G power supply will inevitably become the supporter of high-end equipment, providing stable power supply for high-end equipment and intelligent information system.

With the end of the 5G power supply standard (R15), the commercial use of 5G network devices and the release of 5G mobile phones, 5G has become one of the hot topics in the streets and alleys. People are full of expectations for the application prospects of 5G. The 5G communication base station also has strict requirements on the stand 5G power system.

1.The environment of 5G power system should be clean, ventilated and dry, and the ambient temperature should be controlled between 0 and 40 C. 2.When using UPS power supply, strictly follow the instructions in the instructions to ensure the correct installation of UPS. 3.The range of input voltage fluctuation of UPS power supply is stipulated. If the fluctuation range of municipal power exceeds the stipulation, the pre-protection device, such as voltage regulator, should be used. 4.The stand UP power supply must be grounded in order to prevent accidental leakage from harming personnel. 5.Do not overload with UPS, which has a maximum load period of 80% of the nominal load. 6.Do not switch UPS frequently, so it is easy to damage UPS and load equipment. UPS switches should follow a certain order: when opening, first open UPS city switch, then open UPS, then one by one open load power supply. When shutting down, first turn off load switches one by one, then turn off UPS, then turn off UPS city switch. 7.If generator power supply is to be used in the case of city power outage, the generator power should be guaranteed to be more than twice the rated power of UPS. 8.The newly purchased or long-term unused UPS should be charged for 12 hours continuously, the long-term unused UPS should be charged for 12 hours every three months, and the wet place should be charged for 12 hours every two months.

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Trip to Phoenix Mountain

Summer is coming, everywhere is full of vitality, after the Dragon Boat Festival, it is obviously hot up.Taking advantage of the cool weather, Colleagues from sales department decided to set out for Phoenix mountain.

Colleagues left the busy work, went to the nature to breathe the fresh air and do exercise .We closed to nature and felt its vitality, also for our new friends to join thesales department . To promote mutual understanding and communication, Strengthen our team spirit, build and foster a sense of cooperation , our “phoenix mountain brigades” began!

Start climbing!Everyone in good spirits and high spirits, striving towards the top of the mountain.Although some partners due to physical reasons to slow down the pace of climbing, but they encourage each other, mutual support, everywhere reflects the strength of unity.After about one and a half hours, all reach the peak. The mountain wind blew dry our sweat, we looked around, really have a list of small mountains feeling,All the beautiful scenery in the mountains panoramic was viewed, Filled with green mountains, let us felt particularly touched.

This mountaineering activity is more of a contest of physical strength and endurance.In the process of climbing, the team members always carry forward the spirit of bearing hardships and standing hard work, unity and cooperation, striving for progress and scaling new heights . Not only experienced the difficulty and sense of achievement of mountaineering, but also demonstrated that SOROTEC partners are a high-quality team of unity and forging ahead and indomitable struggle.The activities enhance the collective sense of honor of employees, enhance the communication between employees, shorten the distance between each other, and greatly enhance the collective cohesion.We should learn to experience the beauty of nature, to enjoy nature, enjoy the endless joy of spring, return to nature, relax and embrace nature.This activity promotes the construction of huaantai enterprise culture, enrichs the staff’s spare time cultural life, promotes the communication between all of us, and enhances the friendship between all of us.

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SOROTEC Employee Birthday Party

In May, SOROTEC ushered in the 10th employee collective birthday party. We hope everyone can feel warmth and happiness by this activity.

At 8:00 p.m. on the 24th,Our company held the may birthday party of the group headquarters in the conference room on the second floor.Twenty-six birthday workers and company leaders, well-wishers attended the party.The whole birthday party scene is beautiful, the food is rich and varied.All of this brought a special birthday blessing to them.

Before the party, the company leader extended his sincere greetings to them, and wish them career progress, happy life.The management reform of the group is recognized, and such activities should continue thereafter.

A cake symbolizes a united collective, a candle symbolizes a hot heart, because of the collective heart became wonderful, because of the heart collective became proud. When the Happy birthday song rang ,the familiar and wonderful melody sounded. Light the birthday candles ,along with the familiar music , the birthday stars closed their eyes, made a birthday wish.The boss cut the birthday cake with all the birthday stars and  distributed it to everyone, then bless you all once again. The atmosphere was pushed to the climax again.

Finally is the talent show program, everyone shows their ability.The atmosphere was filled with warmth and blessings.Friendship and love let us get together to spend this unforgettable time .The company provides such a platform to us, so that we can understand and take care for each other. Make us remember this happy and warm time, the sincere friendship like mountains and rivers flowing in our hearts forever. our friendship follow the sublimation of work, let the sunshine always accompany our life every day! Let us bless the birthday stars would be happiness, healthy, peace from year to year!

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2019 Solar Middle East

In early March 2019, Solar Middle East will be held in conjunction with Middle East Electricity, the world’s largest Electricity show, at the dubai international convention and exhibition center in the united Arab emirates.

SOROTEC sent a team of engineers and salesman to go to the exhibition, the exhibition are all series launch of the first half of the power supply in the field of new product, not only has the most advanced scientific research technology, and greatly improve the comprehensive competitiveness of products, product gold content is high, let a person find everything new and fresh, get the new and old customers consistent recognition and praise.

In this exhibition, all the employees of the company actively contribute their ideas and Suggestions for the development, and all departments actively cooperate and make efforts, showing the good teamwork spirit of solide employees.We firmly believe that under the wise leadership of the company and the unremitting efforts of solide team, solide will surely achieve a new high!Continue to be brilliant!

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SNEC 2019 PV POWER EXPO

On June 5, the SNEC 2019 PV POWER EXPO came to a successful conclusion.”Global green energy and photovoltaic financial summit” will bring together senior experts and stakeholders of photovoltaic industry to discuss and deal with challenges and opportunities of industry development.The global photovoltaic industry, especially in China, is developing rapidly and the market is growing significantly.The integration of household photovoltaic, distributed photovoltaic, energy storage, big data + artificial intelligence, smart energy micro grid, Internet of things and other industries is getting closer.The rapid growth of the renewable energy industry has also created a huge demand for capital.Innovation green finance, adapt to the new trend of development to become a new topic of industry development.In order to adapt to the new trend of finance, new energy and Internet digitization, the conference will explore how to integrate the three major elements of finance, new energy and energy Internet, how to tap the potential of each to promote mutual promotion, form a new pattern, and promote the restructuring of energy system in the global society.

After careful preparation, SOROTEC rely on the exquisite technical level, the world’s leading research and development technology, scientific laboratory, high performance of all kinds of power equipment once again become one of the highlights in the industry.The ingenious design and accurate research data have attracted many Chinese and foreign merchants to stop to watch and consult.Many buyers have brought technical problems in the field of power supply. After the technical guidance and optimization of internal components by our high-quality engineers, many customers are satisfied and purchase intention is reached on the spot.

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Working mode of switching power supply

Switching power supply is to use electronic switching devices (such as transistors, field effect transistors, thyristors, etc.) to make electronic switching devices “turn on” and “turn off” continuously through control circuits, so that electronic switching devices can modulate the input voltage, thus realizing DC/AC, DC/DC voltage conversion, as well as adjustable and automatic voltage stabilization of the output voltage.

There are generally three modes of switching power supply: fixed frequency and pulse width mode, fixed frequency and variable pulse width mode, and variable frequency and pulse width mode. The former mode is mostly used in DC/AC inverters or DC/DC voltage conversion, while the latter two modes are mostly used in switching regulated power supply. In addition, the output voltage of switching power supply also has three working modes: direct output voltage mode, average output voltage mode and amplitude output voltage mode. Similarly, the former is mostly used in DC/AC inverters, or DC/DC voltage conversion; the latter two are mostly used in switching regulated power supply.

According to the way switching devices are connected in the circuit, switching power supply can be generally divided into three categories: series switching power supply, parallel switching power supply and transformer switching power supply. Among them, transformer switching power supply (hereinafter referred to as transformer switching power supply) can be further divided into push-pull, half-bridge, full-bridge and other types; According to the phase of transformer excitation and output voltage, it can be divided into forward, flyback, single and double excitation. If it is divided into uses, it can also be divided into more categories.

SP6U-48200 48V Switching Power Supply Embedded System

1.Constructed with standard 19 inch screen, which has the advantage of wide use. 2.The data center area and the installation cost can be saved due to its small size and the embedded installation. 3.Wide input voltage range (85-290Vac), the power grid is adaptable. 4.Perfect lightning protection. 5.Rectifiers are hot-pluggable. Easy and quick on line maintenance. 6.The rectifier uses DSP (Digital Signaling Processor) ology, makes the power density ran up to 14W/In3. 7.Battery management, prolongs the life of the battery well. 8.Have passed CE, UL, TLC, and other related certifications. 9.Excellent energy conservation and environmental protection.

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Why do people like to talk about power quality nowadays

Nowadays, many people like to talk about “power quality”. There are many products of power quality, such as SVG, APFand three-phase unbalanced regulator, which have become “hot-selling products”. But what are the benefits of improving power quality for people?

Improving power quality is of great significance to the safe and economic operation of power grid, ensuring the quality of industrial products and the normal conduct of scientific experiments, and reducing energy consumption. Power quality is directly related to the overall benefits of the national economy. Good power quality is undoubtedly beneficial to the operation of electrical equipment, but the adverse impact of poor power quality on the operation of power system has not attracted enough attention. From the point of view of harm degree, the harm of some power quality problems is destructive. For example, the overvoltage caused by harmonic resonance in lightning impulse, capacitor and cable switching often causes insulation and mechanical damage of electrical equipment, thus affecting the normal operation of power system. The misoperation of relay protection device caused by harmonic and negative sequence interference will cause huge economic losses in large-scale blackout of power grid. Short-term power supply interruption or voltage drop may lead to production chaos or a large number of industrial smelting products scrapped or even endanger personal safety. On the other hand, some power quality problems mainly affect the performance indicators of electrical equipment. For example, abnormal voltage and frequency deviation will cause the change of speed and power of asynchronous motor load, which will reduce the efficiency of transmission machinery and affect the quality of textiles, papermaking and other products. Harmonic currents circulate in transmission and distribution equipment such as rotating motors, transmission lines and transformers, which overheat these equipment due to additional losses, thus reducing the life or capacity of these equipment. However, it can not be explained that the former power quality problem is more important than the latter. The actual situation is that the latter power quality problem, due to the wide range of electrical equipment involved, has the same impact as the former power quality problem.

There have been a lot of achievements on the study of the harm of deterioration of power quality indicators to electrical equipment. However, different indicators of power quality have different effects on different equipment. Especially when there are multiple indicators of power quality, the impact of different combinations on equipment is a very complex problem. At present, there is no accurate quantitative formula, only some rough formulas and conclusions. The results can be used for engineering estimation.

Therefore, in general, the closer the power quality index is to the rated value, while ensuring continuous and reliable power supply is the symbol of high quality of power. However, from production to consumption of electric energy is an integral whole. The generation, supply and use of electric power system are always in a dynamic balance, and any link of it will have an impact on the quality of electric power. The control of power index needs considerable investment (including the improvement of power grid structure, the balance of active power and reactive power, the use of various frequency modulation, voltage regulation, filtering and reactive power compensation devices, as well as the technical management of dispatching and operation), and the control technology of various index is constantly developing and improving. In fact, the deviation between the power quality index and the rated value is inevitable. The task of formulating power quality standards is to determine the appropriate allowable deviation of power quality indicators from the current (or recent) technical level.

The criteria for judging whether the criteria are reasonable or not should be: 1.Basically, it can ensure the security, continuous power supply and economic operation of the power system. 2.On the whole, it can ensure the normal use of electricity for users’electrical equipment. 3.On the basis of the current technological level, the power sector (including interfering users) should be able to meet the standards after making certain efforts.

400V/480V/690V Static Var Generator(SVG)

Meeting users’ requirements: -COSφ=1.00 -Capacitive and inductive reactive power compensation -Three-phase unbalance compensation

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Three-phase Balance Active Harmonic Filter(AHF)

Meeting users’ requirements: – PF=0.99 and THDi < 5% – Compensation for 2- to 50-order harmonics – Capacitive and inductive reactive power compensation – Three-phase unbalance co

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Fault area of outdoor cabinet

In the fault area of the outdoor cabinet, the cabinet is usually made of cold rolled steel or alloy, which is used to store computer and related control equipment. It can provide protection for storage equipment, shield electromagnetic interference, arrange equipment in an orderly and orderly manner, and facilitate the maintenance of equipment in the future. Cabinet is generally divided into server cabinet, network cabinet, console cabinet and so on. As the user of cabinet, you must know the fault area of cabinet.

Fault area 1: below the cabinet (outside the cabinet)

The area below the rack and above the floor is difficult to manage because leveling bolts or casters vary in size and manufacturer and height. There will be a lot of uncontrolled air in this area. If the area can be properly sealed, it can produce very high benefits. Usually, there is no solid baffle under the cabinet due to the need to connect wires or nets. This will also lead to air leakage in the area, because the heat under the cabinet cannot be released, and the cold air from the perforated floor will also bypass the area.

Fault area 2 and the left and right sides of 3:19 inch cabinet front vertical rail (cabinet interior)

Because customers require that the front-end guide rail can be adjusted and they want to be able to pass through cabinet wiring, most 19-inch cabinet front-end guide rail has leakage points on both sides. The area between the vertical guide rail and the rack or side panel is usually open, allowing hot air to penetrate or cold air to pass through. This will seriously damage the stability of blind strategy. Today’s widened racks (e.g. 800mm) have a 3-inch redundant width on both sides of the 19-inch cabinet rail to cool switches or facilitate the installation of a large number of wires. The cable passes through an unsealed opening and passes through the side or top. These openings should be covered with appropriate materials to seal the voids around the cable and reduce air leakage.

Fault area 4 and 5: top and bottom of bracket mounting space (cabinet interior)

Air leaks may occur in areas above the top U and below the bottom U. Usually, these areas have some space, which varies according to the rack manufacturer. However, this area is the same as that without blind plate. This area is susceptible to hot air recirculation, and cold air from air conditioning is more likely to bypass this area.

SOROTEC Telecom Outdoor Cabinets solution

SOROTEC outdoor battery cabinets was developed for easing customers, pressure in site acquisition, meeting customers,requirements for energy saving and flexible expansion. As an innovative installation solution for site equipment,it not only has a large housing capability like traditional shelter, but also adopts independent compartment temperature control method as outdoor electric enclosures.Because outdoor battery cabinets has few limitations on application scenarios and can satisfy customers,different requirements, it is gaining more and more popularity in modern site.

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Development of Active Power Filters

With the progress of power electronics technology and control technology, domestic active harmonic filter has replaced imported products in various major projects. In 2012 alone, the sales of domestic APF products have exceeded the imported brands by five times. Active power filter will eventually replace the traditional passive filter because of its huge technological advantages, powerful functions and declining price.

During the development of APF, modular APF equipment has gradually replaced traditional cabinet APF with its advantages of small size, convenient installation, high integration, stable operation and convenient expansion. In the next five years, the combination of modular APF and static var generator (SVG) will become the most powerful solution in power quality industry, and will be widely recognized by the market.

Three-phase Balance Active Harmonic Filter(AHF)

Meeting users’ requirements: – PF=0.99 and THDi < 5% – Compensation for 2- to 50-order harmonics – Capacitive and inductive reactive power compensation – Three-phase unbalance co

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400V/480V/690V Static Var Generator(SVG)

Meeting users’ requirements: -COSφ=1.00 -Capacitive and inductive reactive power compensation -Three-phase unbalance compensation

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Principle of Solar Charge Controller

Solar panels belong to photovoltaic devices (mainly semiconductor materials), which produce current by photoelectric effect after irradiation by light. Because of the properties and limitations of materials and light, the generated current is also a wavy curve. If the generated current is directly charged into the battery or directly supplied to the load, it will easily cause damage to the battery and load, and seriously reduce their life. Therefore, we must first feed the current into the solar charge controller, use a series of special chip circuits to digitally adjust it, and add multi-level charge and discharge protection to ensure the operation safety and service life of the battery and load. When power is supplied to the load, the current of the storage battery is first flowed into the solar charge controller, and then into the load after its adjustment. The purpose of this method is to stabilize the discharge current, to ensure that the battery is not over-discharged, and to provide a series of monitoring and protection for the load and battery.

In order to use AC power equipment, it is necessary to add inverter to AC before load.

MPPT Solar Charge Controller 12V 24V 48V 60A 3200W

1. Intelligent maximum power point tracking technology increases efficiency 25%~30% 2. Compatible for PV systems in 12v, 24v or 48v 3. Three-stage charging optimizes battery performance 4. Maximum charging current up to 60a 5. Maximum efficiency up to 98% 6. Battery temperature sensor (BTS) automatically provides temperature compensation 7. Support wide range of lead-acid batteries including wet, AGM, and gel batteries 8. Multi-function LCD displays detailed information

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How to use accumulator correctly in UPS power supply

In the process of using UPS power supply system, people tend to unilaterally think that storage battery is maintenance-free and pay no attention to it. However, data show that the proportion of UPS mainframe failure or abnormal operation caused by battery failure is about 1/3. Therefore, it is more and more important to strengthen the correct use and maintenance of UPS batteries for prolonging the life of batteries and reducing the failure rate of UPS systems.

In addition to the selection of regular brand batteries, we should start from the following aspects to correctly use and maintain batteries:

1.Maintain appropriate ambient temperature

Ambient temperature is an important factor affecting the life of battery. The optimum ambient temperature required by battery manufacturers is between 20℃ ~ 25 ℃. Although the discharge capacity of batteries is improved with the increase of temperature, the cost is that the life of batteries is greatly shortened. According to the test results, once the ambient temperature exceeds 25℃, the battery life will be reduced by half for every 10℃ increase. At present, UPS batteries are generally maintenance-free sealed lead-acid batteries. Their design life is generally five years, which can be achieved only under the environment required by battery manufacturers. If it fails to meet the required environmental requirements, its life span will vary greatly. In addition, the increase of ambient temperature will lead to the increase of chemical activity inside the battery, which will generate a lot of heat, and in turn will promote the increase of ambient temperature. This vicious cycle will accelerate the shortening of battery life.

2.Charging and discharging regularly

The floating charge voltage and discharge voltage in UPS power supply have been adjusted to the rated value at the time of leaving the factory. The discharge current increases with the increase of the load. The load should be adjusted reasonably in use, such as controlling the number of electronic devices such as microcomputers. Normally, the load should not exceed 60% of the UPS rated load. Within this range, the discharge current of the battery will not be excessive discharge.

Because UPS is connected with municipal electricity for a long time, in the environment of high quality power supply and few blackouts, the storage battery will be in floating charge for a long time, which will lead to the reduction of the activity of the conversion between chemical energy and electric energy, accelerate aging and shorten the service life of the battery. Therefore, the discharge should be completed every 2-3 months, and the discharge time can be determined according to the capacity and load size of the battery. After discharge of a full load, recharge for more than 8 hours according to regulations.

3.Utilizing Communication Functions

At present, the vast majority of large and medium-sized UPS have the operability of communication with microcomputers and program control. The corresponding software is installed on the computer, and UPS is connected through serial/parallel ports. By running the program, the computer can communicate with UPS. Generally, it has the functions of information inquiry, parameter setting, timing setting, automatic shutdown and alarm. Through information inquiry, information such as input voltage, UPS output voltage, load utilization ratio, battery capacity utilization ratio, in-machine temperature and power frequency can be obtained. Through parameter setting, basic characteristics of UPS, battery maintenance time and battery exhaustion alarm can be set. Through these intelligent operations, it greatly facilitates the use and management of UPS power supply and its batteries.

4.Replace batteries in time.

At present, the number of batteries equipped with large and medium UPS power supply varies from 3 to 80, or even more. These individual batteries form battery packs through circuit connections to meet the needs of UPS DC power supply. In the continuous operation and use of UPS, due to the difference in performance and quality, the performance of individual batteries is degraded and the storage capacity is not up to the requirements and damage is inevitable. When one or more batteries in the battery pack are damaged, maintenance personnel should check and test each batteries to eliminate damaged batteries. When replacing new batteries, we should strive to purchase batteries of the same type as those of the same manufacturer. It is forbidden to mix acid-proof batteries with sealed batteries and batteries of different specifications.

SOROTEC HP9116CR High Frequency Online UPS 1 – 10KVA

1.Large blue LCD display interface，user-friendly. Pure high frequency online UPS，with voltage adjustment circuit,provide reliable power protection in the bad operation environment. 2.Comprehensive electric isolate and bypass protection. 3.Input power factor correction, reduce the harm of harmonic to the power grid,convenient to match small generators. 4.Automatic alarm, self test function. 5.Wide input voltage range. 6.Input neutral and live wire detect and data protect function. 7.When main power failure, the UPS going to DC start,Convenient and reliable; when main power recover,UPS restart automatically. 8.N+X Parallel Redundancy and Capacity expansion for 6K-10K.

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Difference between Micro Solar Inverter and Traditional Solar Inverter

To optimize the efficiency and reliability of solar power generation system, a relatively new method is to use micro-inverters connected to each solar cell module. Each solar cell is equipped with a single micro-inverter, which enables the system to adapt to changing loads and weather conditions, thus providing the best conversion efficiency for a single solar cell and the whole system.

The concept of micro-inverters has a long history, but it did not attract people’s attention at first. In recent years, with the development of solar power technology and technological progress, micro-inverters are very attractive.

The photovoltaic power generation system with micro-inverters can simplify wiring, which means lower installation costs, higher efficiency of the solar power generation system, and shorten the time required to recover the initial investment.

Many chinese manufacturers of solar on grid inverters are mainly engaged in the development of high-power centralized on grid inverters. With the increasing popularity of domestic and foreign micro-inverters market, many manufacturers have begun to develop micro-inverters. The differences between micro-inverters and traditional inverters are as follows.

1.Inverter has low input voltage and high output voltage. The output voltage range of a single solar cell module is generally 20 to 50 V, while the peak voltage of the grid is about 311 V (220 VAC) or 156 V (110 VAC). Therefore, the output peak voltage of the micro-inverters is much higher than the input voltage, which requires the micro-inverters to adopt the inverters topology with step-up and step-down conversion function. The centralized inverters are generally buck converters, which usually adopt bridge topology. The peak voltage of the output AC side of the inverters is lower than that of the input DC side.

2.The power is small. The power of a single solar cell module is generally between 100W and 300W. The micro-inverters are directly matched with a single solar cell module, and the power level is between 100W and 300W. The traditional centralized inverters generate high enough power through series and parallel combination of several solar cell modules, and their power level is generally over 1 kW.

REVO Series Wall Mounted Integrated Solar Hybrid Grid Tie Inverter With Built-in MPPT Solar Controller

1.Touch screen display. 2.Output power factor PF=1.0 3.On grid with energy storage. 4.Energy generated record, load record, history information and fault record. 5.Language and time setting. 6.Structure with dust filter. 7.AC charging and AC output time setting. 8.Charging voltage and charging current timing. 9.External wi-fi device optional. 10.Parallel operation with up to only available for. 11.Smart battery charger design.

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