CHARACTERISTICS IN LOW VOLTAGE II

Interharmonic voltages; interharmonics level increases due to the development of inverters and other similar equipment and command control. Because of the limited experience in this field, levels of interharmonics are to be studied.In some cases, interharmonics, even weak level, causing the lamp flashing or interference with ripple control systems.Transmission of signals through the network information; In some countries, the general distribution network can be used by the distributor to transmit signals. The voltage value of the transmitted signals, averaged over 3 s, must not exceed the values ​​indicated by Figure 1 in a time period equal to 99% overnight.Nite :Facilities customers can use carrier-current signals at frequencies between 95...

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Posted in: Flicker severity,Interharmonic voltages,Voltage dips

CHARACTERISTICS IN LOW VOLTAGE I

Frequency ; the nominal frequency of the voltage supplied is 50 Hz normal operating conditions, the valuehalf of the fundamental frequency measured in periods of 10 s should be placed in the following ranges:- Coupled network for synchronous connections to an interconnected system:50 Hz ± 1% (ie 49.5 Hz to 50.5 Hz) for 99.5% a year50 Hz +4% / - 6% (ie 47 Hz to 52 Hz) for 100% of the time- No network connection to an interconnected system synchronous (eg food webs that exist incertain islands):50 Hz ± 2% (ie 49 Hz to 51 Hz) for 95% of one weeks50 Hz ± 15% (ie 42.5 Hz to 57.5 Hz) for 100% of the timeAmplitude of the voltage suppliedA standard nominal voltage for low voltage general networks is A = 230 V, both phase-neutraland between phases-...

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Posted in: Flicker severity,Test Method,Voltage dips