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Kelly Marie Angel

Hi all I've recently been reading that sometimes DNOs  deliberately put 132 and 33 Kv transformers on the wrong tapping  to deliberately reduce the voltage on the network to help reduce the load a bit does this happen much? I knew they did it in the early 70s when there was power shortages but I can't believe they still do it now. 

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    AFAIK this is not done regularly these days, but only in exceptional circumstances.  The last case of which I am aware was during the large power cut in August 2019. Voltage reductions failed to shed enough load, so the next stage was to disconnect about 5% of the load.

    Voltage reduction is far less effective these days than it was in years gone by since more and more load is switched mode power supplies that draw constant watts at reduced line voltage.

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    AFAIK this is not done regularly these days, but only in exceptional circumstances.  The last case of which I am aware was during the large power cut in August 2019. Voltage reductions failed to shed enough load, so the next stage was to disconnect about 5% of the load.

    Voltage reduction is far less effective these days than it was in years gone by since more and more load is switched mode power supplies that draw constant watts at reduced line voltage.

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