博文

目前显示的是 六月, 2017的博文

Caution for solar inverter maintenance

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As an electronic product,  solar power inverter  is composed of many multi-element devices. Also known as power regulator, according to the inverter in the solar power generation system can be divided into  off grid solar inverter  and on grid inverter. For inverters used in grid connected systems, can be divided into transformer type inverters and no transformer inverters according to whether they have transformers or not. When operating the grid connected power generation, because of its particularity, can not be careless in the installation and maintenance, otherwise, otherwise, there could be a security risk. Maintenance should pay attention to the following points: 1.Before any maintenance work, the electrical connection between the inverter and the power grid shall be switched off first, and then the electrical connection on the DC side should be disconnected. 2.Wait at least 5 minutes until the discharge of the internal components is completed before repair...

The load of power supply system of traditional data center is too heavy

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The development of computing has posed a great challenge to the power supply system of the traditional data center. Innovative technologies and applications of cloud computing have brought opportunities for operators to transform into integrated information service providers, and have become one of the key development strategies for the telecom industry. As an important IT infrastructure to ensure the uninterrupted operation of data centers, the traditional power supply system has doubled its pressure. The rise of cloud computing has greatly improved the computing density of equipment, which has led to the rapid expansion of the power density. The demand for power supply system, cooling system and computer room increases correspondingly, but the feasibility of expansion or large-scale reconstruction of the data center is very small. This is one of the major challenges that cloud computing has brought to the management of data centers. The age of 4G has begun, further growth of the...

Modular UPS is easy to install and transport

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Tower type UPS needs to be installed and transported as a whole, so it will be difficult. Such as the capacity of 400kVA tower type UPS weight is about 1500kg, the volume of more than 3 cubic meters, the tower UPS will be affected by lack of transport channel, high weight and the difficult transportation, while  modular uninterruptible power supply  can be separated from the handling module, frame, on the other hand most of the models can be transported separately, tower UPS may encounter problems will be smoothly done or easily solved. SOROTEC MPS9335 30-150KVA  modular power solutions 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: F...

Lightning protection design of solar power system controller

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The  solar MPPT controller  of the solar power system only needs the protection of induced lightning (electrostatic induction, electromagnetic induction) and lightning wave. The protection of the controller is to install an over voltage protector in the junction box of the solar array array and the input end of the controller. The input end of the inverter and battery in parallel, and the output end of AC power distribution cabinet is connected with the input end of the inverter, so the protection is in the output of the inverter (i.e., between the fire line and the zero line and the ground, and between the front line and zero line) install overvoltage protector. At the same time, the equipment in the computer room is reliably grounded, and the same grounding potential as the grounding body of the array and the outer frame is arranged to prevent the invasion of the lightning wave and the induction thunder. The protection of AC power distribution cabinet is at the output end o...

How to choose solar inverter for distributed PV system

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Solar inverter in accordance with the installation environment can be divided into indoor inverter and  outdoor inverter . Shell protection grade of indoor  home solar inverter  is low (usually IP20), forced air cooling is often adopted, higher requirements for installation site (requires a good ventilation system), the existing buildings need to be reformed to meet the requirements of installation environment, high cost; The  outdoor solar inverter  with natural cooling mode has high protection level (usually IP65), and the required environmental modification is few and the cost is low; At the same time, because the inverter is installed outdoors, the noise caused by the operation will be greatly reduced the impact on the users, but it needs good equipment protection. On the other hand, the choice of the size of the inverter can be optimized according to the installation conditions. If the installation site is not clear in the initial design, the small power...

Outdoor environment test tree major features of UPS

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Outdoor telecom stations are mainly built in towns, rural areas, mountainous areas, suburban areas and urban outdoor environment, so as to eliminate the signal blind spots in these areas, alleviate the pressure of network capacity or improve the quality of service. The power grid environment in these areas is more complex, and even power blackouts, sudden blackouts and other situations are common. In order to ensure the reliable and stable operation of the telecom network, operators need to use special outdoor communication power supply or  outdoor UPS . Due to the special environment of outdoor UPS, the quality and performance of outdoor UPS are different from those of indoor power supply. At present, operators in the choice of outdoor power supply products, should evaluate mainly from the following three aspects. The reliability of power supply Telecom power supply products is mainly to provide stable power, pure and uninterrupted to the telecom network, protect the equipment ...

The innovative demand of efficient data center for UPS

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The rapid development of telecom technology, great changes have taken place in the internal and external environment of the telecom industry, as the basis of data center,  UPS  ushered in opportunities in cloud computing, virtualization, big data, cloud storage and other aspects. With the continuous expansion of data telecom network and the completion of various service, the technical transformation of power supply and the improvement of power supply maintenance have become the focus of telecom industry. In the telecom network, the higher the scale, the higher the grade, the more critical the business, the higher the requirement of the power supply quality. For example, the operators of the international data center (IDC), large telecom station, this kind of computer room is often required to obtain 365 days 24 hours of uninterrupted and stable, pure power, so it must be used with high reliability and  high availability online UPS  system. If the telecom network fai...

Selection of solar inverter

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When choosing  solar inverters , first of all, should be paid attention to the identification of the packages and products, and to identify the input voltage range, voltage type and maximum input current of the solar inverter; Output voltage level, voltage type, frequency; Maximum continuous operating current, maximum output power, and inverting efficiency. Secondly, the data should be complete, should include at least the following: product details (including technical specifications), product installation instructions, instructions and maintenance instructions. Solar panel inverter  products as a general industrial products, it is recommended that professional personnel guide the use of professional and technical personnel. Non professional person purchased the products, should read product brochures and other documents carefully and strictly in accordance with the documentation requirements of installation, need to contact the manufacturer when in doubt, ensure the corre...

UPS temperature control

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In addition to the cooling fan and circuit breaker switch components, there are a large number of solid state electronic devices in the UPS. They basically do not have mechanical wear, so they can work in the best running condition for a long time. It is necessary to find out the signs of trouble and prevent the hidden trouble from expanding, we must make the UPS work in a suitable environment and do routine maintenance. The working environment of UPS should be the same as that of the computer. The temperature should be controlled above 5 degrees Celsius and below 22 centigrade. The relative humidity should be controlled below 50%, and fluctuation range not exceeding 10%. Of course, it is equally important to these factors that keep the UPS workshop clean, dust-free, unpolluted, and harmful, as these factors also affect the service life of the UPS and cause trouble. In the UPS daily maintenance work, engineers need daily routine inspection, its main purpose is to run the accumulated...

Advantages of solar hybrid inverters

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Hybrid solar inverter  mainly has the function of solar on and off grid power generation, that is to say, in the case of normal power supply, the device closes the bypass relay to realize the power supply load on the household electrical appliance; When the power supply of the power network is not normal (such as the power grid is off, the power grid voltage or frequency fluctuation is relatively large), the device can carry out the power supply for the household electrical appliance after inverting through the battery. Under the condition of suitable sunshine intensity, the device can also be connected to the grid and sold to the grid to gain benefit when the solar power generation function is normal. In terms of technical implementation, the device consists of the following units: First is the inverter unit, the unit receive from solar power from solar panels and DC bus box, through the maximum power point tracking circuit, stable DC bus voltage, finally into the public power ...