Home use, desktop. UPS on the market there are many, what kind of UPS should be selected? Which brand is good? What should I pay attention to when buying?
Hill bar, the price of the main block in the number of batteries, their own use can be the main time to have time to shut down a 5 minutes on the line. 100 dollars on the line
Good mountain (fake also many). Your home in the country is best to use online (expensive, electricity also nearly twice), the city on the use of backup. Replace the battery for three years
APC, Hills, the backup can be, 100 may not work. Taobao on the price is better, model Hill TG500, with the regulator K500. APC's BK500.
UPS has frequency machine and high frequency machine, there are back-up and on-line, frequency opportunities to a lot of high-frequency machine, on-line type will be much higher than the backup price, the general computer on the back with it, Then you can choose a backup of the frequency machine.
This brand has APC, Emerson, Burke, Merlin Gerin these, APC, Emerson, Merlin Geran price is particularly high, the family do not need to buy such a high price, you can consider Burke
If the price and then lower, then you can consider buying high-frequency machine, you can buy a mountain, but not much lower
Buy when the mountain should pay attention to whether it will be fake, especially special mountain fake, really mountain is produced in Shenzhen.
According to the equipment, the electricity environment and the purpose of power protection to be achieved, you can choose the appropriate UPS; For example, the built-in switching power supply of low-power equipment can generally use backup UPS, in the harsh environment should use online interaction Type or on-line UPS, and can not be allowed to intermittent time or time requirements of sine wave AC equipment, can only use on-line UPS.
First to determine how much power the device is, you can refer to the device's instructions.
Second, we should understand the UPS rated power there are two ways: apparent power (unit VA) and the actual output power (unit W), due to the existence of reactive power caused by this difference, the conversion between the two: In power * power factor = actual output power
Back-up, online interactive power factor between 0.5 and 0.7, on-line power factor is generally 0.8.
To the equipment with UPS UPS should be the actual output power to match the basis of some dealers intentionally or no intention to confuse (VA) and (W) the difference, this point to draw the attention of users.
