What are the key aspects that need to be paid attention to when ensuring power stability through daily maintenance and testing of the Uninterruptible Power Supply UPS?

When the mains power is suddenly interrupted, the Uninterruptible Power Supply UPS provides seamless power supply in milliseconds through the built-in battery pack (DC power) and inverter (converting DC power to AC power), avoiding equipment downtime due to power outages.
Applicable scenarios: Servers, medical equipment, industrial control systems and other scenarios that are sensitive to power outages.
Through automatic voltage regulation (AVR) technology, the input voltage is corrected in real time if it is too high (such as above 260V) or too low (such as below 160V), and a stable voltage (usually 220V±2%) is output. Abnormal power fluctuations such as surges, spikes, and harmonics are eliminated to protect precision electronic components from damage. Ensure that the output frequency is consistent with the equipment requirements (such as 50Hz or 60Hz) to prevent equipment failure due to frequency offset. Absorb instantaneous high voltages generated by lightning strikes or power grid fluctuations through MOV (metal oxide varistor). Automatically detect abnormal current and cut off output to prevent equipment damage or fire risks. Intelligently monitor battery status to avoid shortening battery life due to improper charging and discharging.
The operating environment temperature of the Uninterruptible Power Supply UPS should be maintained at 20-25℃, and the humidity should be ≤80%; high temperature (≥30℃) will accelerate the evaporation of battery electrolyte and cause capacity decay. Clean the dust of the heat dissipation holes of the Uninterruptible Power Supply UPS regularly to ensure that the air duct is unobstructed; avoid dust accumulation causing short circuit or poor heat dissipation. Perform a deep discharge (discharge to 20%-30% of the rated capacity) every 3 months, and then charge continuously for 8-12 hours to prevent the battery "memory effect". Use a special battery tester to measure the internal resistance and capacity. If the capacity is less than 80% of the nominal value, the battery pack needs to be replaced. Batteries of the same brand and model must be replaced. Mixing batteries of different specifications will cause uneven charging and discharging and shorten the overall life. It is recommended that the long-term load does not exceed 60% of the rated power of the Uninterruptible Power Supply UPS (e.g. 10kVA Uninterruptible Power Supply UPS load ≤6kVA) to reserve redundancy to cope with sudden needs. Avoid connecting to motor-type inductive loads (such as air conditioners), as the starting current of such equipment may be instantly overloaded.
Disconnect the mains input, record the time it takes for the UPS to switch to battery power (should be ≤10ms) and the actual battery life. If the battery discharge time is less than 70% of the nominal value (e.g., nominal 30 minutes, actual measurement ≤21 minutes), check the battery health status. Use the UPS management software (such as APC PowerChute) to view the input/output voltage, load rate, remaining battery capacity and other data in real time. Configure email or SMS notification function to timely warn of abnormal events (such as low battery, overtemperature). Regularly check whether the input/output terminals and battery connection cables are loose to prevent sparking or circuit breaking due to poor contact. Observe whether the fan is running smoothly and whether the electrolytic capacitor has bulging or leakage (professional operation is required).
Before maintenance, turn off the UPS and disconnect the mains, battery and load connections, and use insulating tools for operation. The internal capacitor of the UPS may have residual high voltage, and it is necessary to wait for more than 10 minutes for discharge before touching the internal components.