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Thread: Why High Voltage always multiple of 11.

  1. #1 Why High Voltage always multiple of 11. 
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    Do you know why high voltages are always multiple on 11.Like 33 kv 220kv,11kV etc.


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  3. #2  
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    They aren't. Our generator operates at 22KV but that voltage is stepped up to 345KV for transmission. We also have a 138 KV line in the switchyard which is stepped down to 4160 volts for offsite power to the station.


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  4. #3 Re: Why High Voltage always multiple of 11. 
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    Quote Originally Posted by tusix
    Do you know why high voltages are always multiple on 11.Like 33 kv 220kv,11kV etc.
    I guess they are multiples of 220V. 220V is still commonly used as it's within the tolerance of the new 230V+-10% standard.
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