What as basis for UPS power supply evaluation (part 2)
Efficiency
UPS efficiency by measuring the output power and the input power obtained. Mainly determined by the efficiency of the UPS inverter design. Most UPS only 50% load to 100% have better performance, less than 50% when the load is on the sharp decline in the effectiveness of performance indicators manufacturers to provide more than nominal voltage DC, nominal load conditions efficiency. Selection of the best user when the relationship between efficiency and power curve of positive and negative output voltage DC efficiency of 15%. B170PW01 B170PW02 B170PW03
2, the dynamic test
A sudden, abrupt or test load reduction
First with the analyzers’ disruptive power, “Measurement of no load, constant voltage phase and frequency of state, then a sudden increase in load 0-100% load reduction or sudden 100% 0, if the inverter output voltage transient -8% to 10%, and returns to steady state in 20 ms, this inverter index qualified if the inverter output voltage transient exceeds this range, they will have greater current outbreak, regardless of the load of the inverter or themselves are extremely unfavorable, while UPS does not use.
2, features test conversion
The main criterion converted by the converter or the AC power switch to municipal power inverter when the conversion feature. Testing the need for storage oscilloscope and can simulate changes in the electricity regulator. CLAA154WA01 HSD101PFW2 HT14X11
Thirdly, other routine tests
Overload test
The overload test is of great interest to users is an important indicator of the power of UPS. Overload tests are testing the capacity overload machine UPS, operate, although there were loads phenomenon, UPS is also able to maintain a certain time without damaging the equipment. Overload device must be tested equipment indicators, and less than 25 ° C ambient temperature. sony vgp-bps9a
Input voltage surge, protection against overvoltage test
Index by equipment to allow the input voltage range tested, the general UPS to allow 10% input voltage change, when the input voltage exceeds this range should be alert and proceed to feed battery, rectifier stops automatically when the input voltage is restored to the extent permitted noted, the device should be automatically restored to normal operation, the battery automatically discharged into the municipal power to run. In the battery and lift the automatic process, output waveform UPS should not be changed. sony vgp-bps9/b
Discharge test
Mainly to test the performance test battery discharge. Discharge test, it is necessary to record the discharge time; Secondly, we observed shock wave output voltage and the value of discharge protection, the third is to check if it is “late” batteries The battery will discharge before the test for 24 continuous hours of continuous load. sony vgp-bps9
