博文

目前显示的是 十一月, 2016的博文

Correct selection of backup time for UPS

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UPS backup time is generally a problem concerned by customer in the purchase process. Usually most people prefer to choose the  UPS  which power backup the longer the better, in fact, this is not correct. We must firstly clear that the seller will usually have standard type UPS and long-acting UPS. Standard type UPS with built-in battery, after a power interruption can supply power to the load equipment in general for a few minutes to tens of minutes, of course, the length of time depends on the load. Long acting UPS can not only meet the power requirement of load, but also meet the requirements of customers and work types and so on, so the long-term UPS is usually equipped with an external battery pack. If the client is not particularly strict to the work condition of the load, and the power of the load is not particularly large, usually with standard type UPS would be enough. Because the choice of long backup time UPS is bound to increase the number of battery groups and thus in

The difference between online UPS and online interactive UPS

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The  online UPS  is kept the inverter in a working state, it starts by an external AC into DC, then through high quality  inverter  to convert DC to high quality sine wave AC output to the load. The main function of the online UPS in the power supply situation is the voltage stabilizing and preventing the electric wave interference; when the power is cut off, the standby DC power supply (battery pack) is used to supply power to the inverter. Because the inverter has been working, so there is no switching time problem, it is suitable for the power supply which has strict requirements. Online interactive UPS  : this is a kind of intelligent UPS, refers to when the input voltage of the inverter is normal, UPS is working in reverse, for charging the battery; when city power anomaly, the inverter immediately turn to inverter working state, the battery power is converted to AC output, so the online interactive UPS also has the conversion time. Originally, online interaction is the Unite

How to classify the solar controller

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Solar MPPT charge controller is divided into ordinary solar controller, PWM solar controller and MPPT solar controller. Ordinary solar controller use the first generation technology, the working principle is directly to the output of solar panels to hang the battery port, when the battery is disconnected after sufficient reason, because the internal resistance of battery, it is difficult to charge batteries and solar panels is not fully utilized to MPPT tracking efficiency is only 70 ~ 76%, has been out of the market, basically very few people use. PWM solar controller using second generation technology, is the most popoluar type on the market , work is the use of PWM control, compared with the ordinary solar controller, has a lot of progress, can solve the problem of MPPT battery charging dissatisfaction, tracking efficiency is 75 ~ 80%, but the solar panels are not fully utilized. Solar MPPT charge controller uses the third generation technology, the most high-end solar contr

Anti island protection: Series inverter VS Centralized inverter

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The island effect: refers to the power outages due to failure or maintenance of the part of the grid, power lines power supplied by grid connected power generation device, and constitute a self powered islanding phenomenon with the surrounding load. GB/T19964-2012 standard require power station with anti islanding protection equipment, usually the inverter adopts active + passive double anti islanding protection, to protect the inverter in any case can be reliably disconnected from the grid connection. Active protection is usually used to inject small interfering signal to the power grid, by detecting the feedback signal to determine whether the loss of electricity, while the passive protection usually uses the detection output voltage, frequency and phase to determine the occurrence state of the island. Series inverter : the AC side is directly connected in parallel, and the active protection can not be applied in the multi machine parallel system because of the active protection,

Industrial UPS power consumption is high

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The main differences between the  industrial UPS  and  high frequency UPS  are embodied in the rectifier and transformer. Industrial UPS rectifier uses SCR device, the voltage stress is small, the current stress is big, the high frequency UPS mainly uses the IGBT device, the current stress is small, the voltage stress is big. SCR and IGBT are currently completed devices, as long as the application properly, there will be no difference in the reliability. In fact, the  inverter  part of industrial UPS is also use of IGBT, and there is no reduction in the reliability of  industrial UPS power supply , and there is no evidence to prove that the inverter is the weak link in the industrial UPS. From the topological aspect, industrial UPS with the phase controlled rectifier + full bridge inverter, high frequency UPS generally with rectifier + half bridge inverter. These topologies are very popular in the electronics technology, and there is no more reliable question, its reliability depends o

SOROTEC will attend the 2017 Solar Middle East Exhibition in Dubai in Feb.14-16th

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SOROTEC will attend the 2017 Solar Middle East Exhibition in Dubai in Feb.14-16th. We will exhibit our newest UPS & Solar Inverter products .Welcome to visit us at Booth Z2.B30! Exhibition Name: Solar Middle East Exhibition (2017) Exhibition Date: Feb.14-16,2017 The Booth No.: Hall Z2-B30 For more information,please contact us by:ups@soroups.com

The composition of the telecom solar hybrid system

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Solar panels: This is the most central part of the  outdoor solar power system , its main role is to convert the solar energy into electric energy, so as to promote the work of the load. Solar cells are divided into silicon solar cells, polycrystalline silicon solar cells, amorphous silicon solar cells. Because the single crystal silicon cell is rugged, long life (generally up to 25 years), high photoelectric conversion efficiency than the other two types, causing it to become the most commonly used battery. Solar charging controller: its main task is to control the state of the whole system, while protect the battery from over charge, over discharge. At a particularly low temperature, it also has the function of temperature compensation. Solar battery deep circulation: it is mainly stored transformed power by solar panels, generally for VRLAB, while low temperature area requires the use of solar colloid battery, can be used repeatedly. Inverter: in the whole monitoring system.

The main application areas of online UPS system

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Generally, the online UPS system can be divided into three main application areas. 1.information technology Commercial UPS  has been closely integrated with information technology, the bidding specifications of UPS equipment for information technology do not need special technical requirements. Telecommunications, banking, insurance companies and large enterprise data centers are typical examples of commercial UPS applications. In these applications, the interruption of the AC power supply may result in the interruption of data processing and telecommunications transmission, but usually does not cause direct damage to people or property. 2.Critical program or process control For decades, the design and application of  industrial UPS  system to the key program or process control applications has accumulated rich experience. In the application areas, the load side of the AC power supply interruption or instability, may cause dangerous chemical instability failure, or cause huge dama

Advantages and disadvantages of string inverter

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The advantages of string inverter 1.Modular design, its advantage is not affected by the difference between modules, effects of shade, while reducing the best working point of photovoltaic battery and  solar system inverter  components do not match the situation, increase the maximum generating capacity. 2.In the rainy day, foggy area, can generate power for a long time. 3.String inverter with small volume and light weight, convenient handling and installation, do not need specialized tools and equipment, also do not need a special distribution room, can simplify the construction, reduce the area, DC line connection does not need DC bus box and DC power distribution cabinet. 4.Low power consumption, low impact of failure, convenient replacement and maintenance. 5.Multi path MPPT tracking, reduce the impact of the block and the direction, and when a fault occurs, does not affect the power generation, high reliability. Disadvantages of string inverter 1.More electronic component

Partial performance introduction of high frequency UPS

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Excellent electrical performance Low input harmonic current: <5% Output voltage high precision: <2% Overload capacity: 110 ~ 130% of the load can be overloaded for 10 minutes, 130 ~ 150% of the load can be overloaded for 1 minutes Charging current: 4.5A (each module) Support frequency conversion mode 50Hz input, 60Hz output or 60Hz input, 50Hz output Digital control High frequency UPS  adopts the most advanced DSP as the central controller, its powerful computing capabilities can realize the traditional function in most of the UPS now by software, not only greatly improve the accuracy and reliability, and easy to upgrade and maintenance. Intelligent charging Modular high frequency machine adopts advanced three phase charging method: The first phase of large current is constant current charging, fast recharge about 90% of the electricity; Second phase is pulse charging, can fully charge the battery; Third phase is the constant pressure to maintain, to ensure tha