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BS1362 Plug-top Fuse - Peak Cut-off Current

MW (aka Inrush - for those who remember me!)
Hi,


It appears that finding technical data for what must be the most widely used/produced fuse in the UK is surprisingly difficult. I have the Bussmann time-current curves for BS1362 (plug top) fuses. However, I'm unable to get the energy let-through and peak cut-off current graphs (Bussmann's technical dept. doesn't have this). Therefore, I was hoping someone on the forum could help.


The data I require doesn't have to be for Bussmann's BS1362 fuses. This could be for another manufacturer, e.g., Marbo. However, in that case I'd also (ideally) need the time-current curve. I would try Marbo's technical, but I'm unable to find contact details for this company. Does anyone have an old BS1362 datasheet with this information (that's been tucked away for the last 30 to 40 years)?


Many thanks in advance ?
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    Sorry - I agree I was a bit fast and loose with that one.


    What I was trying to say, and didn't make at all cleat,  is that there is no equivalent to a curve like this  one
    80f71a102ad3ee3430a7397cfcd26516-huge-fuse_limiting.png

    For the BS1362. So we do not know where along the line of increasing PSSC to assume a departure from a constant I squared t.

    The only safe thing is to assume a constant energy (I2t = constant) and no roll off at high fault levels, and no effective reduction in PSSC down stream of it. Though I agree it is not true.
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    Sorry - I agree I was a bit fast and loose with that one.


    What I was trying to say, and didn't make at all cleat,  is that there is no equivalent to a curve like this  one
    80f71a102ad3ee3430a7397cfcd26516-huge-fuse_limiting.png

    For the BS1362. So we do not know where along the line of increasing PSSC to assume a departure from a constant I squared t.

    The only safe thing is to assume a constant energy (I2t = constant) and no roll off at high fault levels, and no effective reduction in PSSC down stream of it. Though I agree it is not true.
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