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Ever thought about ... ?

gkenyon
I was asked a series of interesting questions this week about fault protection and overload protection for a particular application. Some of these really make you think, and the physics doesn't always lead you where you think you'd go.


Dropping out of all this, was me pointing out something interesting which I wonder whether it's ever crossed the minds of contributors to this Forum ... so here goes.


Ever thought about what, in typical UK installations, protects the electronics in a plug-in [to a standard BS 1363-2 socket-outlet] phone charger / wall-wart type power converter against:

(a) Fault current (consider both cases of L-N and L-PE); and

(b) Overload current ?




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    Going completely off at a tangent, my latest purchase is a Klein Jobsite Speaker  BluetoothRegistered Speaker with Magnetic Strap - AEPJS2 | Klein Tools - For Professionals since 1857 USB charging suddenly made appliances international as the specification is universal, so no one is worrying about voltages or plug types, I can just use the same products as people in America.


    I get home and start charging my tester, work light, tool batteries, phone, Ipad, power bank, card reader, update the sat nav which has to be plugged in to do so and so on and so forth. There's a proliferation of USB and other chargers in my house and I doubt it's that unusual, apart from in the homes of age group most of my customers are in, the over 80's.
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    Going completely off at a tangent, my latest purchase is a Klein Jobsite Speaker  BluetoothRegistered Speaker with Magnetic Strap - AEPJS2 | Klein Tools - For Professionals since 1857 USB charging suddenly made appliances international as the specification is universal, so no one is worrying about voltages or plug types, I can just use the same products as people in America.


    I get home and start charging my tester, work light, tool batteries, phone, Ipad, power bank, card reader, update the sat nav which has to be plugged in to do so and so on and so forth. There's a proliferation of USB and other chargers in my house and I doubt it's that unusual, apart from in the homes of age group most of my customers are in, the over 80's.
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