We have a SMT production line, want to be equipped with UPS uninterruptible power supply.
First to determine how much power your device is, the power value can refer to the device's instructions.
Second, we should understand the rated power of the UPS there are two ways: the apparent power (unit VA) and the actual output power (unit W), due to the existence of reactive power caused by this search species difference, the conversion relationship between the two: Apparent 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.
Epson to the equipment with UPS UPS is the actual output power to match the basis of some dealers intentionally or unintentionally confused (VA) and (W) the difference, this point to draw the attention of users.
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.
To determine how much power your equipment is, in general, the average PC or IPC power in the 200W or so, the Mac in 300W or so, the server between 300W and 600W, the power of other equipment can refer to the device's instructions The
Equipped with UPS power supply should be based on load and delay to determine the two aspects.
1, load. Determine how much load to solve the problem can be driven. Such as the total load of 3000 watts, and 2000 watts of UPS, apparently "powerless." Must be calculated by calculating the concept of a clear, medium power UPS efficiency by 80%, if part of the inductive load, calculated by 70%. 3000 ÷ 80% = 3750VA, the inductive load is: 3000 ÷ 70% = 4285.7VA. Consider leaving a certain margin, you can choose 5000VA UPS power supply.
2, delay. Delay is the interruption of electricity, how long can power supply problems. The longer the delay, depending on the capacity of the battery, the longer the delay, the greater the capacity of the battery, which means that the investment is increased. With a load of 30 watts, a 100ah12 volt battery is used, and the 16 series is 192 volts in series: 3000 ÷ 192 = 15.625A, 100 (ah) ÷ 15.625 (A) = 6.4 (hours), power can be supplied for 6 hours and 24 minutes.
Recommendation: In some important places, must be implemented uninterrupted power supply, you can take a variety of measures, such as:
1, to win two different power companies, two power supply to the scene. UPS is only as a switch to the two power supply company's "media", then, UPS can be equipped with a delay of 1 to 2 hours of battery can be.
2, reprovision diesel generator. Electricity interruption, generator start, instead of electricity to the UPS power supply.
