Upstream S type .. BENEFITS ???

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Think: the importance of Neutral-isolation/separation during any given N–E faults…
Can any installed 1P+N protection-device(s) break Circuit Neutrals?

tempj-pmeighttq
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Yes, RCBO’s are single pole isolation so the upstream will trip in event of neutral earth fault

JonElectron
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Im guessing its the next best option before pen devices were used ??

gspark
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If there is no benefit how come they fit them as standard in France

brianoneill
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I don't think it's needed. Will be okay for the TT system

krzysztofslocki