Precautions for the Use and Maintenance of Outdoor Portable UPS Power Supply Systems. Outdoor portable UPS power supplies play a crucial role in daily emergency situations. By using a portable UPS, a continuous power supply can be provided, ensuring lighting for outdoor work and maintaining normal operation. The following are some precautions for using portable UPS uninterruptible power supply systems. Correct operation can extend the system's lifespan and improve work efficiency.
Instructions for using outdoor portable UPS power systems:
(1) Outdoor portable UPS power systems have low requirements for ambient temperature, operating normally from +5℃ to 40℃. However, a clean and dust-free indoor environment is required; otherwise, dust combined with moisture can cause malfunctions in the main unit. Storage batteries, on the other hand, have higher temperature requirements. The standard operating temperature is 25℃, and it should not exceed +15℃ to +30℃ under normal conditions. Low temperatures will reduce battery capacity; for every 1℃ decrease in temperature, the capacity decreases by 1%. Discharge capacity increases with increasing temperature, but lifespan decreases. If used for extended periods at high temperatures, the battery life is reduced by approximately half for every 10℃ increase in temperature.
(2) The portable UPS power supply unit contains many high-voltage energy storage devices. Do not disassemble the unit for inspection without authorization. Operators must have basic electrical knowledge and be familiar with the instruction manual.
(3) When the portable UPS power supply system is powered by itself without external power, avoid starting the UPS power supply with a load. First, turn off all loads and turn on the loads after the UPS power supply system starts. Because the instantaneous power supply of the load will impact the battery, the inrush current of multiple loads plus the required power supply current will cause the portable UPS power supply to be overloaded momentarily, which will damage the converter in severe cases.
(4) Outdoor portable UPS power supply systems have limited power margins according to usage requirements. During use, avoid adding high-power extra equipment at will, and do not allow long-term operation under full load. However, the nature of the work determines that the UPS power supply system operates almost uninterruptedly. Adding high-power loads, even when operating under near full load, will cause the main unit to malfunction, and in severe cases, will damage the converter.
(5) The output voltage, waveform, frequency and amplitude of the self-provided generator should meet the input voltage requirements of the outdoor portable UPS power supply. In addition, the power of the generator should be much greater than the rated power of the UPS power supply. Otherwise, if any condition is not met, the UPS power supply will malfunction or be damaged.
(6) Whether in float charging mode or charging/discharging maintenance and testing mode, the voltage and current must meet the specified requirements. Excessive voltage or current may cause thermal runaway or water loss of the battery, while insufficient voltage or current may cause the battery to be undercharged. Both of these will affect the service life of the UPS battery, with the former having a greater impact.
(7) Under any circumstances, short circuits or deep discharges of the battery should be prevented, as the cycle life of the battery is related to the depth of discharge. The deeper the discharge, the shorter the cycle life. In capacity tests or discharge maintenance, it is usually sufficient to discharge to 30% to 50% of the capacity.
What precautions should be taken when maintaining a portable UPS power supply system?
● Annual maintenance is necessary, and thorough preparation is essential beforehand. This includes ensuring all necessary tools, measuring instruments, and anticipating potential difficulties. Appropriate countermeasures, plans, and measures should be in place for any problems that may arise.
●Inspect all drive components and printed circuit boards in the portable UPS power cabinet, as well as the solder joints of the main power circuit and DC power supply circuit. Check for any cold solder joints, false solder joints, or cracks, and for any burnt or discolored components.
● Check whether the transformer coil, connecting devices, and choke are overheated, discolored, or have delaminated enameled wire peeling off, and whether the connecting wire joints are secure.
● For portable UPS units that are stored for a long time, they should be turned on and charged every 3 to 6 months; otherwise, the UPS unit and battery will be damaged.
●Generally, UPS systems have protection measures against battery discharge. Even after the battery discharges to the point of protection shutdown, it can recover to a certain voltage. However, it is not allowed to restart the UPS at this point, otherwise it will cause over-discharge of the battery. Portable UPS systems must be recharged before they can be used normally.
