What as basis for UPS power supply evaluation (part 1)

UPS power test main objective is to identify the actual UPS can meet the requirements of technical indicators. UPS tests generally comprise two types of static dell latitude d830 battery  tests and dynamic tests. steady state test is empty, 50% of rated load and 100% of nominal load conditions, the test input, the output of each phase voltage, a voltage drop, power factor, efficiency, output voltage signal, distortion and output voltage frequency. Dynamic load testing is generally changing (usually chosen by the load of 000-100% and 100% -0), the output voltage test to test UPS waveform characteristics of UPS and dynamic path feedback dell latitude d820 battery energy. 

1, test the balance

The test is called the steady state is the device in the system “normal” test, generally measured waveform, frequency and voltage.

Waveform

Is this condition usually empty and full, the waveform observed  is normal, with the extent of distortion measure the distortion of the output waveform voltage. Under normal conditions, and then the load resistance, measured with a distortion measure total output voltage harmonic content hp pavilion tx1000 battery Xiangdui, products must meet the requirements defined generally below 5%.

Frequency

Generally available observation oscilloscope frequency output voltage and the use of “disruptive power analyzer ‘measurements. UPS output voltage of the current frequency in general can meet the requirements. However, the frequency of the UPS system, the local oscillator is not precise hp pavilion dv3000 battery  enough, they can be unstable in the mains frequency, UPS monitoring the frequency of changes in output voltage. UPS output frequency accuracy generally in line with market power can achieve plus or minus 0.2%.

Output Voltage

UPS output voltage can be tested to judge by the following methods:

A voltage when the rated input voltage is 90%, while the output load or supply voltage from 100% to 110% rated voltage, output load is 0, the output voltage sony vgp-bps8 battery must be maintained at around 3% of nominal range. 

B, rated voltage when the input voltage is 90% or 110%, the output voltage of a charge phase, the two other phases of the load to 100%, the output voltage must be kept above or minus three percent rated the extent of its phase must be stored at 4 degrees centigrade.

C, where the UPS DC input voltage plus or minus 15%, 0-100% output load changes, the output voltage must remain at the nominal voltage range of plus or minus 3 percent. The surface of the target with the previous indicators of repetition, but in fact it is more demanding than the previous target. This is because the control system sony vgp-bps9 battery changes the input signal in a wide range, revealing characteristics not linear to the output voltage does not exceed the allowable range, even higher requirements on the circuit.