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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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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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Outdoor integrated cabinets are mainly used in the communications industry. The main raw materials for outdoor cabinets are sheet metal. Here is a detailed introduction of why we choose sheet metal as raw material for outdoor cabinets.

Outdoor integrated cabinet generally includes shell, bracket, various switches on panel, indicator lamp, etc. The shell is made of steel plate and plastic, with high hardness. It mainly protects the internal components of outdoor cabinet. The bracket is mainly used for fixing the motherboard, power supply and various drivers.

Appearance and material are the most basic characteristics of a cabinet. Appearance directly determines whether a cabinet can be accepted by users. Therefore, the current appearance gradually tends to diversify, so it also occupies a certain proportion in our testing. Material mainly depends on the material used in the cabinet. Whether the edges are curled or not, the quality of the material also directly affects the performance of electromagnetic radiation resistance. Mechanical engineers must be skilled in the design of sheet metal parts, so that the design can not only meet the functional and appearance requirements of products, but also make the stamping die manufacturing simple and low cost. Sheet metal processing cabinet not only looks good, but also durable, long life. Besides the appearance requirements, the design of sheet metal should ensure that the stamping process is simple, the stamping die is easy to make, the quality of sheet metal stamping is high, and the size is stable. These advantages make the cabinet of sheet metal processing so popular.

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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1.The power of UPS generally refers to the output power. The input power is bigger than the rated power, especially when the battery has discharged after a period of power stopping. The input rectifier not only supplies power to the load, but also charges the battery. The maximum current can reach 1.3 times of the rated current. If the battery pack capacity is particularly large, and the host is equipped with a charging module, the current will be greater.

2.UPS itself is a kind of non-linear load, which will produce some harmonic current feedback to the input grid, and will increase the temperature of the generator ball. If the generator load ratio is too high, it may burn the ball.

3.The load behind UPS to the generator is all selected by the internal circuit of on grid UPS to be battery or city power/power generation. It is one-time loading. There is no soft start or other way. If UPS is loaded at 80% load and the impulse current is calculated at three times, all of them exceed the rated output of the generator configured at two times. The frequency and voltage of the generator will decrease at this time. UPS detects this change and will immediately switch to the battery for power supply.

Therefore, the capacity of the generator with UPS should be large enough, not as simple as 2 times the capacity. It should be configured according to the specific situation.

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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1.To have super environmental adaptability

Unlike commercial UPS, which is placed in data centers and server rooms under strict control of temperature, humidity and cleanliness, industrial UPS is often difficult to ensure stable temperature and humidity in the industrial environment. In addition, in special industrial occasions, the air in the environment may also contain corrosive gases, which will affect the normal operation of power supply equipment and reduce its performance over a long period of time. Therefore, this requires industrial UPS to have super environmental adaptability, and to cope with the test of harsh environment with comprehensive high-performance performance.

2.To be able to effectively eliminate all kinds of radio disturbances

Power grid pollution in industrial application site is very serious, and it often faces the situation of power supply shortage and frequent accidents. Precision production equipment in industrial production line always has very strict requirements for power supply. Power problems such as voltage instability and current flashover may cause equipment damage or lead to quality problems in product production. Therefore, as the core of industrial power supply system, high-quality UPS is an important part of power protection. It should have the characteristics of providing high-quality power to the load under any load and market electricity input, eliminate the impact of instantaneous interruption of power grid on industrial equipment system, effectively avoid the high frequency of power grid, prevent the harm of overvoltage to load, and ensure the reliable operation of key industrial processes and control.

3.To have super load capacity

In the industrial production, management, monitoring and other links, there are a large number of load equipment, especially in the industrial automation production line, using a large number of automatic control equipment, DCS, computers and so on, and these loads mostly include inductance load, capacitance load, fluctuation and high peak impact load, which have a great impact on the current. At the same time, in the industrial enterprise users, the balanced distribution of the load group is always relative, and the unbalanced distribution is absolute, especially in the production sector, the unbalanced phenomenon is more serious. Therefore, the outstanding load capacity is another important challenge for industrial UPS.

Based on the nearly harsh application standard of industrial UPS, only those enterprises that have developed, produced and served high-power UPS technology and series products and accumulated corresponding industrial application experience can design and produce industrial power uninterruptible power supply system well. Only in view of the harsh physical environment, power supply environment and load environment of industrial applications, can provide high reliable and highly available industrial UPS products and solutions to meet the special needs of industrial enterprises.

IPS9312 IPS9332 10-160KVA Industrial UPS

■Adopt full digital control technology.
■Intelligent detection and monitoring function.
■Digital control and static switch zero switching.
■Input/output full isolation
■DC UPS isolated with utility power completely.
■Cubicle design with power standard.
■Multifunctional protection for overvoltage,low voltage,
■Overcurrent, short circuit and so on.
■Large-screen LCD monitor Chinese and English operation interface.
■Ultralong 256 event records, user-friendly analysis and management to the situation of power supply.
■Static bypass has a strong anti-overload capacity.

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