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065月 2019

Physical environment is usually neglected when UPS is selected by industrial enterprises. Due to the influence of production and manufacturing site factors, there are many problems in industrial application environment, such as high temperature, humidity, large amount of dust and serious air pollution. In special industrial occasions, the air in the environment may also contain corrosive gases, or the body inclines in the case of vibration, which may easily lead to short-circuit of UPS internal components and power supply failure. Therefore, UPS need to have a strong environmental adaptability, to respond to the test of harsh environment with comprehensive performance.

From the point of view of electrical environment, the precise production equipment of the production line always has very stringent requirements for power supply. Power grid pollution in industrial application site is very serious, and it often faces special power supply and special industry standards. As the core of industrial power supply system, industrial UPS should be able to provide high-quality power to the load under any load and power supply conditions, eliminate the impact of instantaneous interruption of power grid and various radio disturbances on industrial equipment system, effectively prevent the harm of overvoltage of power grid to the load, and ensure the reliable operation of key industrial processes and control.

Load characteristics are an important factor affecting the selection of industrial grade UPS. In industrial automation production, due to the variety of types of electrical equipment, large differences, and complex load characteristics, the total load is often inductive, and the current fluctuation is relatively large, which will have a greater impact on the power supply. Therefore, the steady-state current and transient peak current and duration of the load are an important consideration when selecting an UPS for inductive or hybrid loads that exceed the UPS output power factor range. Due to improper consideration of the UPS power, the customer’s funds are wasted, and if the selected industrial UPS power supply is too small it will have an impact on reliable load protection. These are the ones we should avoid when choosing.

 

SOROTEC IPS9312 IPS9332 10-160KVA Industrial UPS system

■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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224月 2019

1.Based on the rated current of the final electric load (motor), it is better that the rated current of the harmonic filter is more than 1.1 times of that of the load current.
2.Look at the rated working current and actual working current of the load, and do not exceed the rated working current of the harmonic filter.
3.Look at the load rate. If the load rate is too low, it will affect the effect of harmonic filter. Please check load rate data when selecting the type.
4.Check the rated working voltage and power frequency of the load equipment to see if it meets the power requirements of the harmonic filter.
5.Attention should be paid to the installation environment of harmonic filters, which meets the requirements of the environment for the use of harmonic filters.
6.It is better to provide the power factor of the load so that suitable capacitors can be installed to achieve the best power factor.

 

SOROTEC Three-phase Balance Active Harmonic Filter(AHF)

Meeting users’ requirements:
– 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

164月 2019

We know that the input voltage range of 12V power supply server motherboard is usually 5% positive and negative difference. If we adopt the structure of 12V bus + 12V battery BBU, it is difficult to achieve this voltage allowable range. Especially at high currents that may be as high as 23,000 amperes, the voltage drop at impedance of 1 milliohm is as high as 2 or 3 volts, and the voltage drop of copper exhaust is much higher than the voltage range of 5% or about 0.6 V. If the voltage drop is controlled by current sharing among multiple power outlets and buses, in addition to the cost and space mentioned above, additional DC/DC voltage stabilization circuit is needed to ensure the voltage reduction caused by BBU discharge. The total cost of this DC/DC voltage regulator circuit will be very high, which will also lead to the overall uneconomical system. In 48V bus structure, the main board usually has a wide range of input voltage of 36V-58V, bus voltage drop is no longer a problem, and battery BBU can be directly connected to 48V bus, without DC/DC voltage regulator circuit, so it is very easy to adopt 48V bus structure voltage allowable range.

 

SHW48200 48VDC Outdoor Power Supply MPPT Off-Grid Telecom Station Solar Hybrid System

■Adopt advanced MCU microprocessor control technology.
■Advanced MPPT Technology,High converting efficiency higher than 97% for minimizing energy loss.
■Reversed current protection at night, over voltage and reverse polarity protection.
■Capable of selecting different charging mode for various types of batteries.
■Protection degree:IP55
■Industy-leading power density compact size and high reliability;
■Doorframe designed with waterproof structure, posted on the seal and equipped with waterproof lock on the door double insulation design;
■Cabine adopt quality galvanized sheet or aluminum coated steel sheet as material, surface coating anti-UV power;
■Suitable for outdoor installation.

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solar hybrid system,48vdc power supply,solar dc power system,outdoor dc power supply

 

094月 2019

Where low-voltage transformers are installed and large-scale electrical equipment should be equipped with reactive power compensation devices, especially those with low power factor must be installed in industrial, mining, enterprises and residential areas. Large asynchronous motor, transformer, welding machine, punch, lathe group, air compressor, press, crane, smelting, steel rolling, aluminium rolling, large switch, electric irrigation equipment, electric locomotive and so on are particularly needed. Apart from incandescent lamp lighting in residential areas, air conditioning, refrigerators and other reactive power consumption objects can not be ignored. In rural areas, the power consumption is relatively poor, the power supply is insufficient in most areas, the voltage fluctuation is very large, and the power factor is especially low. The installation of static var generator is an effective measure to improve the power supply situation and improve the utilization rate of electric energy.

 

400V/480V/690V Static Var Generator(SVG)

Meeting users’ requirements:
-COSφ=1.00
-Capacitive and inductive reactive power compensation
-Three-phase unbalance compensation

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400V/480V/690V Static Var Generator(SVG)

 

313月 2019

In solar inverters, there are parasitic inductances which are harmful to power switching devices. They are stray inductances. Stray inductance will increase with the increase of current, the size of connecting wire and the distance. In the process of IGBT switching off, voltage spikes will occur due to the sharp decrease of current. There are several risks: First, IGBT will be overvoltage. In the case of high current, it is necessary to use IGBT with higher voltage level, but the device with higher voltage level will lose more and cost more. Secondly, voltage spike will also bring additional switching loss, which will reduce system efficiency and increase cost.

 

Reasonable design of interconnected conductors of inverters to reduce the inductance and its influence is very important to improve the reliability and operation performance of inverters. Inverters generally adopt the following three methods to reduce stray inductance:

 

1.Using stacked bus

The positive and negative terminal directions of capacitors are consistent with the current directions, and the distance between capacitors and power devices is as short as possible, the distance between the positive and negative poles of the stacked bus is as short as possible. The distributed inductance of the line is reduced by the parallel distribution of the positive and negative electrodes, which reduces the reverse peak voltage at both ends of the power element, reduces the requirement of the power device for the voltage protection absorption circuit, improves the reliability and stability of the operation of the power device, and improves the integration of the circuit so as to facilitate maintenance.

 

2.Using high frequency absorption thin film capacitance

Absorbing capacitors play a similar role in the circuit to low-pass filters, which can absorb the peak voltage. Usually used in insulated gate bipolar transistor (IGBT), eliminating the peak voltage caused by busbar stray inductance, avoiding the damage of insulated gate bipolar transistor.

 

3.Using power module

The power module uses special technology to integrate and package multiple components together, which ensures the shortest distance between components and reduces the distributed inductance of the circuit. To reduce stray inductance, medium power group series inverters usually adopt the scheme of power module and centralized inverters, usually adopt the scheme of stacked bus and absorbing thin film capacitors.

 

REVO-E 3-5.5kW Hybrid Solar Energy Storage Inverters

1. PV and utility power take the load at same time ( can setting ).
2. Output power factor PF=1.0
3. On/Off grid with energy storage.
4. AC charging and AC output time setting.
5. Charging voltage and charging current timing.
6. External Wi-Fi device optional.
7. Connected with battery optional.
8. Wide PV input range 120-450VDC.
9. MAX PV Array Power 4500W.

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