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main fuse

  1. eveares

    What overload protection is there upstream of incoming HRC Cutout?

    If one's incoming HRC fused cutout was short circuited upstream of the main 60A/80A/100A fuse, is the only other protection the thermal overload on the sub transformer or is there any additional in protection? Do sub transformers have any direct magnetic based overload protection like MCB's do...
    • eveares
    • Thread
    • 100a consumer unit fused cutout hrc incoming supply main fuse sub transformer
    • Replies: 18
    • Forum: Electrics UK
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