The difference between high frequency and low frequency UPS

The difference between high frequency and low frequency UPS

UPS uninterruptible power supply of high frequency and power frequency although belongs to the categories of UPS, but between the two distinct, and the price is also sent a lot, UPS power supply is not the more expensive the better, but the right is the best.Therefore, it is necessary for UPS users to first understand the advantages and disadvantages of both, and choose the right one.On the one hand, it may save you some expenses.On the other hand, in your future use, will make the UPS uninterruptible power supply effect to play to the maximum!

Firstly, high frequency machine UPS uninterruptible power supply: the use of high frequency switching technology, high frequency switching components to replace the rectifier and inverter in the frequency transformer UPS uninterruptible power supply, UPS dealers commonly known as high frequency machine, high frequency machine small volume, high efficiency.UPS uninterruptible power supply: UPS uninterruptible power supply, commonly known as power frequency machine, which adopts power frequency transformer as rectifier and inverter components, is mainly characterized by stable and reliable main power components, overload capacity and strong impact resistance.

Second, high frequency machine VS power frequency machine: first of all, high frequency UPS uninterruptible power supply does not have an isolation transformer, its output zero line exists high frequency current, mainly from the power grid harmonics *, battery rectifier and high frequency inverter pulsating current, load harmonics *, the voltage is not only high value and difficult to eliminate.And the power frequency machine output zero ground voltage is lower, and there is no high frequency component, for the security of computer network communication, is more important.Secondly, the output of the HF machine is not isolated by the transformer. If the inverter power device has a short circuit, the high DC voltage on the DC bus (DCBUS) is directly added to the load, which is a safety hazard, while the power frequency machine does not have this problem.Finally, the power frequency machine load impact capacity than the high frequency machine.