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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