What is the reason for the noise of UPS power supply?

What is the reason for the noise of UPS power supply?

1, check whether the cooling fan is loose, you can ask professionals to reinforce the fan screw;Cooling fan noise, which is unavoidable, especially high-power UPS, the sound is larger.Of course, when it is found to be louder than the new purchase, dust should be carried out, especially dust on the fan blade and the protection net.

2. Internal accessories of UPS power are loose.

3, UPS power aging.

4. Precursors of UPS power component failure.There is no regular peep, snap, it is very likely that UPS is out of order, this should be carefully observed, if necessary stop check.

5. Buzz.Power frequency sinusoidal wave output UPS power supply, internal with a larger transformer, when the battery power supply to restore the power supply, this is not only to meet the output, but also to charge the battery, transformer full load work, 50 weeks of alternating hum and resonance with the chassis and a buzz.This is only happening at a particular time.

6. UPS is in battery power supply, and the power supply time displayed by the machine is 0. Please check whether the battery voltage is normal.

 how to solve UPS power noise?

1. The current relatively new UPS power supply and UPS equipment can absorb the noise such as the surge voltage of the input power system. At this time, the output line of UPS equipment should be separated from other distribution lines with sufficient distance.In engineering design, shielded cables should be used for the lines that need parallel wiring. If metal pipes are used for electromagnetic shielding, the effect is better.

2. The signal line of UPS equipment is separated from the power line. Shielded cable is adopted and electromagnetic shielding is added to prevent noise intrusion into UPS equipment.

3. Another situation is that if the signal line in the cable TV network equipment is close to the input and output lines of the UPS equipment, the switching noise of UPS will be sensed on the signal line, which should be paid attention to in the wiring design.

4. During wiring, we should lay out the ground wire in the cable TV network, and the actual wiring of the ground wire of the cable TV network is quite complex, but the most basic design principle should be to reduce the ground impedance and eliminate the ground loop.