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UPS power supply specific parameters, UPS power supply technical parameter requirements. UPS power supply technical parameters are important indicators of UPS quality and the main basis for model selection. Whether the UPS power supply can provide pure and uninterrupted power supply to the load equipment normally and safely requires a detailed understanding of its performance parameters. In this article, the editor will take you to understand the main technical parameter requirements of UPS.
UPS power supply specific parameters, UPS power supply technical parameter requirements
The technical parameters of UPS power supply mainly include: rated capacity, input voltage range, input power factor, output voltage, output power factor, battery voltage, overall machine efficiency, etc.
The technical parameters of UPS power supply mainly include: UPS power power, AC power main input, input voltage range, AC power main input and bypass input, total input current harmonic distortion, bypass AC power input, overload capacity, ECO mode, Communication and management, control panel, size and weight, electromagnetic compatibility, working altitude, storage altitude, etc.
Technical parameters of UPS power supply
Input characteristics:
1. Input voltage range A wide input voltage range can reduce the chance of battery discharge and extend battery life.
2. The input power factor is low, the input reactive power is large, and harmonic current pollutes the power grid and affects other equipment.
3. Allowable range of main power frequency.
4. Input the harmonic component of the current. (PFC, 6/12 pulse transformer)
Output characteristics:
1. Static stability. 1% for large and 2% for small and medium-sized.
2. Output transient characteristics. 5% for large and 8% for small and medium.
3. Output overload capability. (For example: overload 125% 5MIN; 150S)
4. Output power factor. (0.8, 0.9, 1)
5. Output voltage harmonic distortion. Typically within 3%.
Rated operating parameters:
Rated output power; rated maximum output and input current; rated output input frequency, which is standard 50Hz in my country; nominal input and output voltage, determined according to the way of incoming and outgoing wires, mainly single in and single out, three in and single out, Three-in and three-out method. Large and medium-sized UPS power supplies adopt the three-in and three-out method.
Other parameters: mean time between failures is 200,000 to 400,000 hours (large UPS power supply), 150,000 to 220,000 hours (medium-sized UPS power supply); parallel capability requires the UPS to have direct parallel output capability, and the average output current of each UPS 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.
Introduction to UPS power supply solutions
Centralized power supply method:
Advantages: It can realize equipotential control of network equipment resources and reduce the transmission bit error rate.
Disadvantages: Large initial investment, single machine failure has a great impact.
Decentralized power supply method:
Advantages: The scheme layout is flexible and the impact of failure is small.
Disadvantages: If the entire equipment cannot be kept in the same ground line, it may easily cause a fault.
Precautions for use and maintenance of UPS power supply
Maintain a suitable ambient temperature. An important factor affecting the life of the UPS power battery is the ambient temperature. Generally, the optimal ambient temperature required by battery manufacturers is between 20-25°C.
Charge and discharge regularly. The float voltage and discharge voltage in the UPS power supply have been adjusted to the rated value when leaving the factory, and the discharge current increases with the increase of the load. The load should be reasonably adjusted during use, such as controlling electronic equipment such as microcomputers. The number of units used.
Take advantage of communication features. Most large and medium-sized UPS power supplies have operable functions such as communication with microcomputers and program control. Install the corresponding software on the microcomputer, connect the UPS through the serial/parallel port, and run the program to communicate with the UPS using the microcomputer.
In the continuous operation and use of UPS power supply, due to differences in performance and quality, it is inevitable that the performance of individual batteries will decline and the storage capacity will not meet the requirements and be damaged. When certain batteries/batteries in the battery pack are damaged, maintenance personnel should inspect and test each battery to eliminate damaged batteries.
During daily use, do not place containers containing various liquids on or near the UPS machine to avoid spills and short circuits inside the machine. If you are working near the machine, it is best to turn it off and cover it. If you cannot shut down the machine, you should also add a cover to the top air outlet to prevent dust and metal particles from falling into the machine and causing short-circuit failures on boards and components.
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