Test the end of UPS, whether does the real skill index that basically is appraisal UPS satisfy use requirement. The test of UPS includes stable state test and trends to check two kinds commonly. Stable state test is to be in carry for nothing, below 50 % rated load and condition of 100 % rated load, test input is carried and each phase voltage of output end, line voltage, sky carries the frequency of weaveform of voltage of factor of loss, power, efficiency, output, distortion factor and output voltage to wait. Dynamic test is commonly in laden mutation (general choice load is mixed by 0 % ~100 % by 100% ~ 0 % ) when, test UPS outputs the change of voltage weaveform, in order to examine the dynamic character of UPS and energy feedback access.

One, stable state checks

Test of so-called stable state is to show equipment enters “ system the test when normal ” condition, can measure undee, frequency and voltage commonly.

　　 1.The test inputs characteristic parameter and method

(1) power input factor
Technical index: GB is≥0.8.
Test method: Detect harmonic of weaveform of UPS input electric current and weaveform of its and voltage are phasic poor integration analysis. Analyzer of harmonic of electric power of usable England PA4400-4 number is read continuously (when carry for nothing and be fully loaded with) .
The meaning of this test is as follows:
① reduces input end not to have the main component that work loss is UPS section report. 6 pulse commutator, if do not add input filter, its are the 20 % of rated power about without work loss.
② reduces the power of dynamoes of pair of provide for oneself to compare a requirement. If power input factor is 1 when, the power that needs to provide a generator is compared for 1:1, so 6 pulse commutator and if the input did not add harmonic filter again, the power that needs to provide a generator is compared for 2.5 ∶ 1. Land please: ? of pole of uncut jade of Mian Lai white browses more information
③ reduces the pollution that causes to electrified wire netting. This index should consider to go in when equipment of choose and buy.

(2) input frequency limits
Technical index: GB is 50Hz±2.5 % .
Test method: Use frequency conversion power source or dynamo. Fixed specified number inputs voltage surely, the change inputs frequency, with memory oscillograph observes what UPS inputs frequency to dog limits.
This technical index demand is not high, all brand UPS can be achieved. Dog mains frequency range is wide, show UPS and electrified wire netting match easily.

(3) volts d.c. inputs limits
Technical index: GB does not have a regulation.
The limits of volts d.c. should indicate in UPS manual, the volts d.c. that configures as a result of the UPS place of each brand (nominal value) different, limits is so different also.
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