UPS common sense: rated output and load size (1)

The user shall select the required UPS Output Power KVA value based on the statistical value of the device load). To ensure the UPS system efficiency and prolong the UPS Service life as much as possible, the recommended parameters are: the user load only accounts for 60% of the UPS output power ~ 70% is recommended.

Selection of UPS rated output capacity

The user shall select the required UPS Output Power KVA value based on the statistical value of the device load). To ensure the UPS system efficiency and prolong the UPS Service life as much as possible, the recommended parameters are: the user load only accounts for 60% of the UPS output power ~ 70% is recommended.

-- There are three UPS models available for users to choose from based on different distribution systems.

Single-Input v)/single-output V output)

Three-in-One 380V input)/Single-out 220V output)

3-in-3 380V input)/3-out 380V output)

-- Redundant power supply is a computing center and network management center that have high requirements on power supply quality, such as a bank, securities, and aerospace center. To ensure load power supply is safe, the following redundant power supply systems with fault tolerance are often used:

Host ~ Redundant power supply system of the slave model: the structure is to connect the AC bypass of the host UPS to the inverter power output end of the slave UPS, in case the host UPS fails, it is carried by the slave UPS.

"1 + 1" type direct parallel redundant power supply system: it directly connects two output units with the same power UPS units in the same amplitude, phase, and frequency. During normal operation, each of the two UPS instances is responsible for 1/2 of the load current. If one of the UPS instances fails, the remaining UPS instances are responsible for all the load. The average working time of the parallel system (MTBF) is 7 ~ of the single-host UPS ~ 8 times, thus greatly improving the system reliability.

Multi-host direct parallel redundant power supply system: Some UPS can directly combine multiple UPS instances in the "N + 1" redundancy mode. Note: As the number of N in multiple parallel systems increases, the MTBF Value of the parallel system will gradually decrease.

Considering the impact of user load on startup, generally the optimal load capacity should be about 80% of the UPS capacity.

The UPS's load-carrying capability is the first consideration when selecting a UPS instance. That is, a large-capacity UPS instance is required, and the selected UPS instance has load capabilities in various situations, they all need to be taken seriously. UPS is not like a transformer, as long as the load power does not exceed its rated output capacity kVA) value, regardless of the load, the UPS output capacity is not only related to the load size, but also related to the nature of the load. Reasonable configuration of system capacity can ensure the power supply quality of UPS, reduce the failure rate, save investment, and improve economic efficiency.