When choosing a UPS, the first few basic aspects worth considering are: 1. Technical performance; 2. Quality assurance; 3. Service guarantee; 4. Product price.
How to determine what type of UPS power supply you need? Usually, personal office and home users can consider backup models, such as the Santak backup UPS power supply, which is inexpensive, lightweight, and an ideal partner for personal computers. It has a high cost-effectiveness: for network users, servers, or precision instruments of small and medium-sized systems, online or online interactive UPS is often used, which can better resist various infringements from the power grid. Its functions are complete and mostly have intelligent monitoring and network connection functions, realizing remote control and intelligent management. For large and important equipment and systems, high-power Santak online UPS is essential for providing stable power protection.
How does the county determine the required power VA? List all devices that need protection, including monitors, terminals, and external hard drives. The voltage and current data of each device can be found on the backplane, and multiplying the two yields the VA value. Some devices use watts to indicate the required electrical energy, and multiplying the wattage by 1.4 gives an approximate VA value. The overall power of the equipment is based on its rated number. Summarize the VA values of all devices and add 30% of the total capacity for system upgrades.
How to configure backup time? Due to differences in systems and equipment, the selected UPS model and configuration also vary.
Standard UPS
The built-in battery of the device can generally continue to supply power for several minutes to tens of minutes after a power outage; Long term UPS is equipped with an external battery pack, which can meet the needs of users to continue power supply during long-term power outages. The backup time can be designed to be several hours to tens of hours or even longer. The backup time of general long-term UPS is mainly limited by factors such as battery cost, installation space size, and battery recharge time. Generally, in areas with poor power environments and frequent power outages, UPS and generators are used in conjunction for power supply. When there is a power outage, the UPS is first powered by the battery for a period of time. If the power outage lasts for a long time, the backup generator can be started to continue supplying power to the UPS. When the mains power is restored, it can switch to mains power supply.
The battery power supply time is mainly affected by factors such as load size, battery capacity, ambient temperature, and battery discharge cut-off voltage. Determine the required capacity of the battery based on its ability, expressed in ampere hours (AH), and calculate the number of hours it takes to discharge at a given current ampere rate.
The general UPS configuration is calculated using the following formula:
UPS power (VA) x time (hours) – UPS power startup DC=required battery ampere hours (AH)
Taking the 4 hours of Santak C3KS as an example, let’s calculate: Note: The starting DC of Santak C3KS is 96V
3000 volt ampere x 4 hours -: 96V=125AH
The result is that a 125AH battery is needed to provide 4 hours of power, but ordinary batteries generally do not have a set of 8 batteries with a capacity of 125AH (because the starting DC of C3KS is 96V – (the standard DC voltage of UPS at the factory). Most batteries are 12V DC, and 96V (UPS starting DC voltage) -12V (battery DC voltage)=8, so a set of 8 batteries is used)
We can choose a set of 100AH batteries to configure it: Its time is: 100AH (battery capacity) x 96V (UPS startup DC) -3000V (UPS power supply)=3.2 hours
You can also choose to configure 2 sets (16 pieces) of 65AH batteries in parallel! Its time is: 65AHx2x96V-3000VA=4.16 hours
The standard starting DC voltage of American Santak UPS voltage at the factory:
MT1000SC1KSC2KS-C3KSC6KS-3C20KS3C3-10KS–3C340KS
24VA36V96V240V384V
The voltage output power factor of Santak UPS in the United States is 0.7; The maximum supported load power of Santak C1KS is 1000Vx0.7=700W, so the maximum supported load of Santak C1K is 700W, and so on! (Note: In order to better use UPS, it is recommended that UPS power supply should not be used without load/with full load or with overload. The best load power for UPS power supply is about 70% -80% of its standard load. For example, C1K is best equipped with a load of 500-600 (w)!)! This can better leverage the advantages and characteristics of UPS power supply and extend its service life