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The main technical parameters of UPS power supply and UPS performance characteristics. UPS power supply technical parameters are important indicators of UPS quality and the main basis for model selection. Important parameters of UPS power supply performance, the better the performance, the stronger the protection capability. UPS power supply is a protective power supply equipment. Its performance parameters are of great significance and are one of the key points to consider when purchasing.
Main technical parameters of UPS power supply
1. Input parameters
Input voltage range, according to the low quality of my country's power grid, a UPS with a wider range should be selected. The current range of UPS designed with thyristor is -15%, +10%. If this value is exceeded, the failure of the UPS power supply will be increased. rate; the UPS should have automatic protection functions for three-phase input phase sequence errors and three-phase phase loss input.
2. Output parameters
The static stability of the output voltage is ±1% for medium and large UPS power supplies; the transient voltage fluctuation value of the output voltage is less than ±5% for medium and large UPS; the adjustable range of the output voltage.
3. Rated operating parameters
Rated output power; rated maximum output and input current; rated output and input frequency are all standard 50Hz in my country; nominal input and output voltage are determined according to the way of incoming and outgoing wires.
4. Other parameters
The mean time between failures is 200,000 to 400,000 hours (large UPS power supply) and 150,000 to 220,000 hours (medium-sized UPS power supply); the parallel capability requires the UPS uninterruptible power supply to have direct parallel output capability, and the output current of each UPS is equal to The flow unbalance is 2% to 5%, and this value should be as small as possible; it should have remote monitoring, fault alarm, and operating status recording functions; it should have lightning protection, surge suppression, and anti-static discharge functions.
UPS performance characteristics
●UPS’s adaptability to various loads
This does not refer to conventional indicators such as voltage stability, waveform distortion, frequency stability, dynamic response time, backup conversion time, etc. What should be paid attention to is whether the UPS can operate normally under some special load configurations. Such as strong capacitive load, impact load, rectifier filter input load, load with same power linear transformer input.
●Intelligence and network maintenance capabilities
The intelligence and network protection of UPS power supply is a new technology. For users, there is a process of gradually understanding and continuously expanding the scope of application. When choosing, pay attention to the following three issues. First, the functions of the software should generally include safety shutdown systems, status test recording systems, UPS own management systems, and even environmental monitoring systems. Second, the variety (compatibility) and operability of operating systems that the software can support. Third, it is best for the software provided to be tested and certified by the relevant operating system manufacturers.
●Battery performance and enhanced battery system management
Regarding batteries, we should pay attention to two issues. One is to choose batteries with excellent performance, and the other is to consider the use and management capabilities of UPS continuous power supply for batteries. At present, some advanced UPS manufacturers are doing very effective work in this regard. For example, the charging circuit is configured according to the physical and chemical characteristics of the battery, the battery charging status is monitored at any time, the charge and discharge protection is set by the software, the battery floating voltage is temperature compensated, and the battery can be hot-swapped under normal working conditions.
●System configuration flexibility and redundancy function
When the capacity of one UPS does not meet the demand, multiple units can be connected in parallel. In order to improve reliability, multiple redundant configurations can be used. This UPS power system configuration presents modular technology, multiple parallel technology, and series-parallel redundancy. Surplus technology, bypass maintenance technology, etc., which have a significant effect on improving the flexibility, scalability, maintainability and reliability of the power supply system.
●Inspection of UPS power supply hardware system
As a protective power supply device, UPS's performance parameters are of great significance and should be the focus of our consideration when purchasing. The hardware system is a key factor that determines whether the UPS host operation is reliable. The contents to be inspected include the technical level and maturity of the manufacturer, production capacity and process level; the variety and quality of the selected components; the advancement and maturity of the circuit wait.
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