Maximum zs
- Thread starter sparky23
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You working to adjusted figures or not?
What for, MCBs/Fuses?
The max figures are in BS7671, if you are going to spend any money you may as well get the 2008 version. The max Zs for MCBs is given by the supply voltage divided by the max current required to operate the magnetic part of the MCB, i.e. for B type x5, C type x10, D type x20.
As an example, for a 6A MCB @ normal mains voltage is 230 / (6x5) = 7.66 ohms. This is the maximum tabulated value, not corrected for temp.
The max figures are in BS7671, if you are going to spend any money you may as well get the 2008 version. The max Zs for MCBs is given by the supply voltage divided by the max current required to operate the magnetic part of the MCB, i.e. for B type x5, C type x10, D type x20.
As an example, for a 6A MCB @ normal mains voltage is 230 / (6x5) = 7.66 ohms. This is the maximum tabulated value, not corrected for temp.
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Amtech has all the max figures for normal BS devices, corrected and uncorrected. It auto checks for you.
It does not have the data for devices such as manufacturers MCCB's, ACB's etc. You need to use manufacturer data for these, and this is nearly always just a few clicks away once you find the manufacturers website.
It does not have the data for devices such as manufacturers MCCB's, ACB's etc. You need to use manufacturer data for these, and this is nearly always just a few clicks away once you find the manufacturers website.
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