Technology is always in the development and has now entered the digital age, the new technology to replace the old technology is the law of history, the level of competition increased significantly, which is also true in UPS power supply industry.
Advantages of high frequency UPS
1.Low power consumption
In the same index, such as the input power factor is above 0.95, the UPS must be applied in low frequency harmonic filter or changed to 12 pulse rectifier, that is to increase a device in the front, coupled with the output transformer, two more links than high frequency UPS. Due to the influence above, the efficiency of the low frequency UPS is 5% lower than that of the high frequency UPS. In the same capacity of 100kW, low frequency UPS consume more 50 thousand kwh of electricity each year than the high-frequency UPS! This has far-reaching significance in energy saving and emission reduction today.
2.High input power factor
Low frequency UPS is generally below the input circuit of the 200kVA, using a SCR 6 pulse rectifier, the input power factor is not over 0.8, the harmonic current is up to 30%. If use the front generator, the generator capacity of at least 3 times as much as UPS power; if it is a single-phase low power UPS, the generator capacity of at least 5 times of the UPS. Any capacity of high-frequency UPS input power factor can be 0.99 or more, the harmonic current is less than 5%, the capacity of the generator and UPS power in theory the same, greatly reducing the investment and floor area, etc., which is of great economic and social significance to make full use of the electricity market. The machine and circulation attenuation can be reduced to almost zero. The parallel of the low frequency UPS is the direct parallel connection of the transformer, and the direct parallel connection of the transformer is most likely to produce the circulation, and the path of this circulation is unimpeded.
3.Small size, light weight
Low frequency UPS because of the output transformer and the low frequency components, such as the capacitance adapt to 50Hz, and the bulk weight is very large. For example, a 200kVA low frequency UPS weight 1380kg, while the 250kVA high frequency UPS weight only 830kg.
4.Full digital technology
Low frequency UPS initially using simulation techniques, now generally developed as a combination of digital and analog technology. The reliability of simulation technology is lower than that of digital technology. The high frequency UPS is a full digital technology, obviously that the reliability is very high.
5.Small external interference
There are two kinds of interference, one is the mechanical noise can be heard, one is the electrical noise cannot be heard, low-frequency UPS have both kind of these two noise, forming the harm to people and the device. The electrical noise affects the stability of the machine, and the mechanical noise affects people’s physical and mental health and reduces the working efficiency. The high frequency UPS due to work in more than 20kHz, and it is the frequency which human ear can not hear, so that the working environment is quiet. And because of the high frequency UPS input power factor up to 0.99, almost linear, so the external interference is almost zero.
6.Strong ability to adapt to the grid
Low frequency UPS is very difficult to adapt to the change of input voltage ±15%; The high frequency UPS and even adapt to the input voltage of more than ±30% of the change, which greatly extends the battery life.
SOROTEC double conversion online UPS GP9335C series 120-800KVA low frequency
Features:
■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 120 kva UPS with 10% above, as users reduce investment cost.
■Advanced distributed active parallel technology can realize parallel operation of 6PCS 120 kva 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.
