13Mar 2019

A device used to filter one or more harmonics in power system; most of its structures are composed of inductors, capacitors and resistors, i.e. passive harmonic filters, which also serve as reactive power compensation; the emerging filtering technology also includes active harmonic filters.

It is used to filter harmonics in power system with voltage less than 1000 volts, such as harmonics generated by six-pulse rectifier, also known as harmonic generator.

Based on the principle of electromagnetic induction and reactor, a filter compensation system is composed of high performance filter capacitors connected in series with high linearity filter devices to compensate reactive power while absorbing the main harmonic components of the system. By integrating dynamic reactive power compensation and filtering functions, it can quickly follow the load changes, and has three main functions: restraining current fluctuation, absorbing harmonics of power grid and compensating reactive power.


Three-phase Balance Active Harmonic Filter(AHF)

– 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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Three-phase Balance Active Harmonic Filter


04Mar 2019

Building Integrated PV(BIPV) is a new concept of solar power generation. Simply speaking, solar photovoltaic power generation square array is installed on the outer surface of the building envelope to provide power. According to the different ways of combining photovoltaic array with buildings, building Integrated PV can be divided into two categories: one is the combination of photovoltaic array and buildings. The other is the integration of photovoltaic array and building, such as photoelectric tile roof, photoelectric curtain wall and photoelectric lighting roof. In these two ways, the combination of photovoltaic arrays and buildings is a common form, especially with the roof of buildings. Because the combination of photovoltaic array and building does not occupy additional ground space, it is the best installation method of photovoltaic power generation system widely used in cities, so it attracts much attention. The integration of photovoltaic arrays and buildings is an advanced form of BIPV, which requires higher requirements for photovoltaic modules. Photovoltaic modules should not only meet the functional requirements of photovoltaic power generation, but also take into account the basic functional requirements of buildings.


According to the different ways of combining photovoltaic arrays with buildings, building Integrated PV can be divided into two categories:


1.The combination of photovoltaic array and architecture.

In this way, the photovoltaic array is attached to the building, which acts as the carrier of the photovoltaic array and plays a supporting role. The further combination of photovoltaic arrays and buildings is the integration of photovoltaic devices and building materials. The general building envelope surface uses paint, decorative tile or curtain wall glass, the purpose is to protect and decorate the building. If photovoltaic devices are used instead of some building materials, that is, photovoltaic modules are used to make roofs, exterior walls and windows of buildings, so that they can be used as building materials as well as power generation, which is perfect. For frame structure buildings, the whole envelope structure can be made into photovoltaic arrays, and appropriate photovoltaic modules can absorb both direct sunlight and reflected sunlight. At present, a large-scale color photovoltaic module has been developed, which can achieve the above objectives and make the appearance of the building more attractive.


2.The integration of photovoltaic array and building.

This way is that photovoltaic modules appear in the form of a building material, and photovoltaic arrays become an integral part of the building.


SPS3115C Series 1-10KVA outdoor solar system

1.Pure sine wave inverter
2.Built-in MPPT solar charge controller
3.Could be built-in battery
4.Protection degree:IP55
5.Configurable input voltage range for home appliances and personal computers via LCD setting
6.Configurable AC/Solar Charger priority via LCD setting
7.Compatible to mains voltage or generator power
8.Auto restart while AC is recovering
9.Overload/Over temperature/short circuit protection
10.Configurable battery charging current based on applications via LCD setting

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SPS3115C Series 1-10KVA Outdoor Solar Power system(Outdoor solar power system,outdoor solar system,solar off grid system) 3

26Feb 2019

1.Appearance and surface quality

Because the cold plate is obtained after the cold rolling process, and cold rolling also carries out some surface finishing, the surface quality of the cold plate (such as surface roughness) is better than that of the hot plate. Therefore, if there is a higher requirement for the coating quality such as post-sequence painting, cold plate is generally chosen. In addition, hot plate is divided into pickling plate and non-pickling plate. The surface of pickling plate becomes normal metal color because of pickling, but the surface is still not as high as cold plate because of non-cold rolling. The surface of non-pickling plate usually has oxide layer, blackening, or iron oxide black layer. Popularly speaking, it’s like it’s burned, and it’s usually rusty if the storage environment is not good.



Generally, the mechanical properties of hot plate and cold plate are considered to be indistinguishable in engineering. Although there is some work hardening in cold rolling process, the yield strength of cold plate is slightly higher than that of hot plate, and the surface hardness is also higher. How to do this depends on the degree of annealing of cold plate. However, the strength of annealed cold plate is higher than that of hot plate.



Because the properties of cold and hot sheets are close to each other, the influencing factors of forming properties depend on the difference of surface quality. Because the surface quality of cold sheets is better, the forming effect of cold sheets is better than that of hot sheets.


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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22Jan 2019

1.Blown fuse

Normally, blown fuses indicate that there is a problem with the internal circuit of the switching power supply. Because the power supply works in the state of high voltage and high current, the fluctuation and surge of the grid voltage will cause the instantaneous increase of the current in the power supply and cause the blown to fuse. Emphasis should be placed on checking rectifier diodes, high voltage filter electrolytic capacitors, inverted power switches, etc. at the input end of the power supply, and checking whether the components have breakdown, open circuit, damage, etc. If the blown is indeed fused, we should first look at the various components on the circuit board to see whether the appearance of these components has been burned, whether there is an electrolyte overflow, if the above are not found, then use a multimeter to measure the breakdown short circuit of the switch tube.

Special attention should be paid to the fact that when a component is found to be damaged, it must not be replaced and turned on directly. It is very likely that the replaced component will be damaged because other high-voltage components are still malfunctioning. It is necessary to thoroughly check and measure all the high-voltage components of the above circuit before the blown fuse can be completely eliminated.


2.No DC Voltage Output or Voltage Output Instability

If the fuse is perfect, there is no output of DC voltage at all levels under load. This situation is mainly caused by the following reasons: open-circuit and short-circuit phenomena in power supply, over-voltage and over-current protection circuit failure, auxiliary power supply failure, oscillation circuit not working, power supply overload, breakdown of rectifier diode in high frequency rectifier filter circuit, leakage of filter capacitor, etc. After eliminating the breakdown of high frequency rectifier diode and short circuit of load by measuring secondary components with multimeter, if the output is zero at this time, it is sure that the control circuit of power supply is out of order. If a part of the voltage output indicates that the front circuit works normally, the fault occurs in the high frequency rectifier filter circuit. The high frequency filter circuit mainly consists of rectifier diode and low voltage filter capacitor. Among them, the breakdown of rectifier diode will make the circuit without voltage output, and the leakage of filter capacitor will cause output voltage instability and other faults. The damaged components can be detected by static measurement of the corresponding components with a multimeter.


3.Poor load capacity of power supply

Poor load capacity of power supply is a common fault, which usually occurs in old-fashioned or long-time power supply. The main reason is the aging of components, unstable work of switch tube, lack of timely heat dissipation and so on. It should focus on checking whether the regulator diode is heating and leakage, rectifier diode damage, high voltage filter capacitor damage, etc.


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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48v switching power supply,switching power supply 48v,48v smps power supply

16Jan 2019

Some people may find that their inverters display 15.3 degrees of power today, but only 14.5 degrees on the meter. A little difference in a day, accumulated over time, that’s a lot! So is the meter installed by the power supply company deliberately slowing it down? Of course not. Now let’s explain to you. There are two main reasons:


1.Causes of line loss: As the heart of photovoltaic, all DC power must be processed to 220V AC power, and then transmitted to the grid through the meter. Then it means that there is a line between the solar inverter and the meter. If there is a line, there must be loss. The size of the loss depends on the length of the line and the specifications of the wire, so it’s normal to make a little difference every day. But if there are many differences, it must be a problem.


2.The measurement problem: not that they measure differently, but the accuracy is not the same. Generally speaking, at present, the precision of our single-phase smart meter is about 1 s, which is 1%, and our inverters are about 0.5% error. So there are inherent differences in statistics between the two. The meter data statistics are inherently superior to the error value of inverter. Plus the line loss, all the power generation is less, also belongs to the normal range.



SSP3118C off grid solar inverter specifications 1-5KVA(solar off grid inverters)

1.Pure sine wave inverter
2.Cold start function
3.Auto restart while AC is recovering
4.Overload and short circuit protection
5.Optional remote panel available
6.Selectable charging current based on applications
7.Configurable AC/Solar input priority via LCD setting
8.Compatible to mains voltage or generator power
9.Smart battery charger design for optimized battery performance
10.Parallel operation with up to 6 units only available for 4KVA/5KVA
11.Selectable input voltage range for home appliances and personal computers

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