I open this thread after some discussion arose in the 'tips and tricks' thread regarding appropriate fusing.
So I open with my understanding of proper fusing and may be corrected if I am wrong. I will begin at the power input point all the way through to smaller circuits.
RCD at input to device (i.e. mains) - fuse before rectifier and surge protection devices so that fuse blows first in event of surge damaging surge protection devices - fuse on each individual power rail after conversion to protect circuitry - output ports (i.e. Digital outputs) should have short circuit protection
The tricky part becomes whether an RCD can be used. On larger power supplies i imagine the core losses to be large enough to simulate a large enough earth leakage (normally 30mA) to trip the device.
What are your thoughts on this matter?
So I open with my understanding of proper fusing and may be corrected if I am wrong. I will begin at the power input point all the way through to smaller circuits.
RCD at input to device (i.e. mains) - fuse before rectifier and surge protection devices so that fuse blows first in event of surge damaging surge protection devices - fuse on each individual power rail after conversion to protect circuitry - output ports (i.e. Digital outputs) should have short circuit protection
The tricky part becomes whether an RCD can be used. On larger power supplies i imagine the core losses to be large enough to simulate a large enough earth leakage (normally 30mA) to trip the device.
What are your thoughts on this matter?