In principle, the main difference between online UPS power supply and backup UPS power supply is that the backup UPS only stabilizes the mains power when there is mains power, and the inverter does not work, in a waiting state. When the mains power is abnormal, the backup Schneider UPS power supply will quickly switch to the inverter state, inverting the battery power into AC power. Therefore, the backup APC UPS power supply will have a conversion time of less than 10ms during the pilot reverse operation.
After the online APC UPS power supply is turned on, the inverter is always in working state, so there is no interruption time when the mains power is abnormally converted to battery discharge, that is, zero interruption. The online APC UPS power supply adopts dual conversion technology, and the output power quality is high. Regardless of whether the mains power is normal or not, the entire power of the load is provided by the inverter. Due to the use of IGBT, the inverter will definitely adopt SPWM technology and try to increase the modulation frequency to reduce the output harmonic components. Through output feedback control, it can provide high-quality power supply voltage with high voltage stability, low waveform distortion, low frequency stability, and fast dynamic response speed to the load. The high-capacity APC UPS bus adopts an online dual conversion circuit topology.
The usage environment of APC UPS power supply should pay attention to good ventilation, which is conducive to heat dissipation. And keep the environment clean.
The APC UPS power output socket should be clearly labeled and should not be loaded with unrelated loads or short circuited,
Do not carry inductive loads such as cash counters, fluorescent lamps, and air conditioners to avoid damage. Half wave rectification type load is also not suitable.
If users use a generator for power supply during a power outage, they should ensure that the generator power is greater than four to six times the rated power of the APC UPS power supply. The online UPS power supply can only be connected after the generator has started and stabilized.
When turning on the load of APC UPS power supply, the principle of first increasing and then decreasing is generally followed
The optimal load control for APC UPS power output is around 60%, with the best feasibility.
Regularly clean the interior of APC UPS power supply to prevent excessive dust accumulation in online UPS power supply, which may affect the normal operation of APC UPS power supply
The daily maintenance of APC UPS power supply should be carried out on the basis of ensuring the normal operation of the load, so it is important to pay attention to the condition of the load during maintenance and try not to affect its operation.