50 hz systems 1

[advidana]

utility power source 380/220 vac, 3 phase, wyn 50 hz with neutral. Question-is the neutral normally grounded in countries outside of the USA, such as the middle east for this type of power.

 

[Skogsgurra]

The Continental Europe had this as a standard for many years while the UK had 415/240 V 50 Hz. Europe now has "harmonized" voltages and has 400/230 V 50 Hz througout. All these systems have a grounded neutral (TN-C) with a few exceptions. Norway being one that I am aware about.

The Middle East has inherited the 380/220 V TN-C and it is very common. But there might be exceptions.

Consult

http://kropla.com/electric2.htm

and similar sites for more information.

Gunnar Englund

http://www.gke.org

 

[advidana]

Thanks for the information it gives me a better understanding of this system.

 

[powerwagon75]

Skogsgurra,

You're correct on the middle east, and at least one exception being Saudi. Last time I was there, they were still using 220/127V 60Hz.

A little gee-whiz FYI...

http://kropla.com/electric2.htm

Eric

 

[powerwagon75]

Oops, sorry about that. Was going to delete the link before posting. (redundant)

 

[vic3fan]

To complete the answer to your question, you should be advised that in USA and Canada the most commom low voltage distribution level is 208/120 V, 60 Hz. The utility provides for each of their residential customers two phases and a neutral, and the residential wiring is designed such as the appliances are to be fed phase-to-phase (208 V) while the rest of the receptacles are phase-to-neutral (120 V).

 

[davidbeach]

vic3fan, the vast majority of US and Canadian residential services are 120/240V; two phase conductors 240V between them and a neutral at the mid-point. The use of two phases of a 208Y/120V system for residential is generally confined to multi-dwelling buildings that would have needed something more that 800A of 120/240V.

 

[advidana]

The equipment for the project I am working on will require being powered from 380/220 vac 50 hz. I need to know more specifically information for dual rated 50 hz and 60 hz equipment and loads used on this system.