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55v - 110v centre tap transformer short circuit calculations

hello

i have been trying to work out how to work short circuit calculations for 110v systems. do i use 55V with c max or do use 110v or even use a 3phase calculation. i am trying to work out if a circuit will trip on 16A c type mcb for short circuit as i am putting a rcbo in to cover the fault current.

110v 55v

0.85ohms line to line tested

4mm 2 core cable

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0 Sparkingchip over 3 years ago

It seems a bit over the top adding RCD protection upfront of the circuit with circuit protection in place and SWA cables in the fixed installation.

You could add RCD protection at the sockets by replacing the existing fittings, not cheap though you should beat this price.

https://www.cef.co.uk/catalogue/products/1150765-16a-2p-e-110v-unswitched-socket-with-25a-rcd-ip44

What risks do you consider there are that require the additional 30 mA RCD protection?
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0 Sparkingchip over 3 years ago

It seems a bit over the top adding RCD protection upfront of the circuit with circuit protection in place and SWA cables in the fixed installation.

You could add RCD protection at the sockets by replacing the existing fittings, not cheap though you should beat this price.

https://www.cef.co.uk/catalogue/products/1150765-16a-2p-e-110v-unswitched-socket-with-25a-rcd-ip44

What risks do you consider there are that require the additional 30 mA RCD protection?
Cancel
Vote Up 0 Vote Down

Cancel

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55v - 110v centre tap transformer short circuit calculations

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