The SURT series machines launched by APC company have significant differences from previous SU series machines. This article discusses their differences from three aspects: circuit structure, application scope, and machine performance.
1. The difference in circuit structure: APCSU series UPS adopts an online interactive circuit structure. After the mains input is filtered, it is subjected to surge suppression and output to the load for power supply. At this time, the inverter acts as a charger to charge the battery. When the mains power fails, the UPS takes the battery power and converts it into DC/AC to output it to the load for power supply. The SU series machines have a 2-4ms conversion time to switch to battery power supply when the mains power fails.
The APCSURT series UPS adopts a dual conversion online (commonly known as pure online) circuit structure. After the mains input, it first undergoes AC/DC conversion, that is, the AC mains input is converted into DC, and some of the electrical energy is used to charge the battery. Most of the electrical energy is converted into AC power through DC/AC conversion to supply the load. When there is a mains power failure, the UPS takes battery power and converts it to DC/AC to supply power to the load. The SURT series machines have no conversion time when turning to battery power during mains power failure, that is, the conversion time is zero. When UPS malfunctions, it will automatically switch to bypass operation.
2. Difference in application scope
SU online interactive UPS provides high-quality power protection for servers and network devices,
SURT pure online UPS not only protects servers and network equipment, but also provides high-quality power protection for communication systems and self-control equipment. The APCSURT series can also be compatible with fuel generators.
3. Differences in Machine Performance
The SU series UPS is an online interactive design. When running on mains power, the output voltage fluctuates with the mains power. When the mains power voltage is too high or too low, the UPS activates the voltage regulation (AVR) function. When running on battery power, the output voltage is a sine wave, with a default value of 230VAC. Users can choose between 220VAC and 240VAC through software. The SURT series UPS is a pure online design, and regardless of whether the UPS is running on mains power or battery power, it outputs a stable sine wave, with a default value of 230VAC. Users can choose between 220VAC and 240VAC through software. Output voltage accuracy: 1% when the load is static, 5% when the load is dynamic. Output voltage misalignment: 3% when with linear load, less than 5% when with nonlinear load. The SURT series machines adopt a tower mounted rack mounted flexible conversion installation method. This series of UPS can be installed in a tower form, and with the addition of rack mounted conversion accessories, it can also be easily converted into a rack mounted UPS.
Summary: Compared with the SU series machines, SURT has higher performance voltage output, zero conversion time, and flexible installation methods that can be converted between tower and rack.