AC Voltage Range

See the recent thread http://cr4.globalspec.com/thread/51139/LV-MV-and-HV. A good information is there.

- MS

· Reference : The IE Rules,1956, Amended Nov,2000, Rule 2(av)

Voltage definition Voltage range under normal condition

Low <= 250 volt

Medium <= 650 volt

High <= 33000 volt

Extra high > 33000 volt

no there is no difference in band width only voltage increases ,frequency remains same

I agonized over joining this discussion largely due to the fact that the answer you are seeking is situational and not specific. If you are an electrician in the US low voltage is less than 1000V. That same electrician considers everything above 1000 volts as simply high voltage. If you are a journeyman lineman in the US low voltage is the voltage produced on the "low voltage" or secondary side of a transformer. This means that the low voltage side of a 230KV transformer could be 46KV or 12KV depending on the windings. So - - - Generally speaking in the US, and I am sure I'll be corrected, LV =<1000(120/208/240/277/480); MV=<15KV (4.1/7.6/8.3/11.8/12.4/13.8); HV=115KV<27/33/46/69/115/132); EHV=<345KV(169/230/345); UHV=<1000KV(400/550/750).