博文

目前显示的是 一月, 2017的博文

Low frequency UPS is power, large volume, heavy weight

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There are three factors leading to the efficiency of  low frequency UPS  lower than  high frequency UPS . Firstly, the low frequency UPS rectifier for buck topology, the device operating current is large, whether the internal line of linear loss or square loss are higher than the  online high frequency UPS ; Secondly, due to the reasons for the need to boost the output, the low frequency UPS use the built-in multi output transformer, while the high frequency UPS not, resulting in the efficiency of low frequency UPS decreased by 2%-3%; Thirdly, in the practical application, in order to improve the input power factor to more than 0.95, and decrease the injection of harmonic pollution, the external low frequency UPS a 5 or 11 harmonic filter, the efficiency will drop again 2%-3%. According to a British operator and a Spanish operator network operation statistics, the efficiency of low frequency UPS in general about 85%, while the high efficiency UPS of 92% and modular ...

India will develop solar power generation

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India is a populous country, the power demand is great, while the power gap is also great, especially in summer. Last summer had been a serious power panic, nearly half of the country’s population interrupted power supply. Limited in the traditional energy supply, the development of solar photovoltaic industry is a good choice to solve the power supply situation. The India government has paid more attention to solar power, this year the development of solar photovoltaic power generation business as part of its energy strategy task, has shown great enthusiasm from the government to the state of the development of solar energy. One after another public sector investment in the construction of solar power station, and last year, there are reports that New Delhi will install  outdoor solar power system  in subway station. So far, the country has more than 1000 megawatts of solar power, and plans to increase to 22 billion watts until 2022, which will be a very large system engin...

Some possible problems of high frequency intelligent UPS as a high power application

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1.The low reliability of the IGBT rectifier Due to the high frequency intelligent UPS has not yet found the large magnetic flux material, so that its “boost inductor” temperature is too high, leading to he low reliability. Because of this, the UPS industry has not yet been able to produce a enough reliable high power high frequency intelligent UPS. 2.High frequency intelligent UPS bias exists the hidden trouble of “zero bias fault” The problem is another so-called “achilles heel”. High frequency UPS will produce a phenomenon which will not appear in other UPS models. In the upstream AC power through the ATS switch, the output of UPS will be more than 8ms output voltage flicker. It can lead to data center room for several minutes to several hours of paralysis. 3.When the city is cut off and the battery is discharging, the system efficiency of high frequency intelligent UPS is reduced by 2% When the power is cut off, the battery is discharging. Generally below 10kVA or 30kVA capaci...

Optimal power system topology for online high frequency UPS

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The module online high frequency UPS integrates the advantages of centralized and decentralized power supply topology, introduced the concept of the regional power supply from the design. If separated in several areas of a large data center, in each region configure a set or two sets (redundant) 3A3 UPS power supply system, directly placed in the area near the load, power supply through the switchboard on the cabinet. In this way, each region is centralized power supply, centralized management, and among different region is the decentralized power supply independently, so is wiring. 3A3 online high frequency UPS power supply has the advantages of decentralized which is flexible configuration, allowing gradual investment, not easy to produce a large area of paralysis, but also has the advantages of centralized which is easy to manage. Humanized operation interface and perfect power management software. Parallel operation system uses the big screen LCD as the operating interface, sho...

How to connect sine wave solar inverter with power supply

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First turn off the  pure sine wave inverter  and all the device switches. Then the battery is powered, the negative electrode of the battery is connected to the black terminal (-) of the inverter, and the positive electrode of the battery is connected to the red terminal (+) of the inverter. Generally speaking, there are two kinds of auto inverter according to the output current waveform, which is square wave inverter and sine wave inverter. Generally speaking, there are two kinds of inverter according to the output current. Due to the instability of the square wave inverter power supply, the quality of output of the AC current is relatively poor, and the load capacity is poor, and more than 40% to 60% the load, it is likely to damage the electrical appliances. The car cigarette lighter power supply: dedicated connection lighter on the inverter according to the red cable connected to red terminal, black cable connected to black terminal inverter, the plug inserted into the ...

Application of SOROTEC outdoor UPS in telecom

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In the telecom network, due to various reasons, the network can not achieve full coverage. In order to solve the network coverage, reduce the investment cost, shorten the construction period, in recent years there has been a lot of outdoor telecom station, repeater, micro cellular and other outdoor telecom equipment, the demand of  outdoor rated UPS  is also significantly increased. In addition, with the start of 3G, the telecom market will invest a lot of money for the construction of 3G network, which provides a rare opportunity for the development of outdoor UPS. However, whether the quality of  outdoor UPS  can withstand the test of wind and rain, is a problem that every manufacturer must face. These base station equipments are generally placed outdoor, and installed in the roof or mountaintop where the power supply quality is bad, need to consider the influence of high and low temperature to the equipment, because dust accumulation will reduce the insulation ...