Thee interruption, the re-establishment after an interruption or the fluctuation in whatever manner of the powersupply to the machinery must not lead to dangerous situations.
机械的动力供应中断、动力供应中断后的恢复或动力供应的任何方式的波动，均不得导致危险状况。
2
It covers five aspects: supply voltage tolerance, utility harmonic, three-phase voltage unbalance, power system frequency tolerance, voltage fluctuation and flicker.