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Student & Learning Zone - City & Guilds
Type d mcb
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<blockquote data-quote="poni" data-source="post: 533083" data-attributes="member: 1497"><p>they do all trip at the same time, but at different currents,</p><p>MCBs are made to trip at 0.4s to meet the regs, </p><p>if they did not trip in 0.4s they would not meet the regs and we could not use them ,</p><p>just like when you have a high Zs and insufficient current flows the MCB will not trip in 0.4s </p><p>look at your 383amps and see what time your MCB will trip it will be a lot more than 0.4s</p></blockquote><p></p>
[QUOTE="poni, post: 533083, member: 1497"] they do all trip at the same time, but at different currents, MCBs are made to trip at 0.4s to meet the regs, if they did not trip in 0.4s they would not meet the regs and we could not use them , just like when you have a high Zs and insufficient current flows the MCB will not trip in 0.4s look at your 383amps and see what time your MCB will trip it will be a lot more than 0.4s [/QUOTE]
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