进阶级别
配电箱短路耐受能力、中性线谐波，以及电弧闪络标签背后的数值。
- 阅读约 4 分钟Arc flash basicsArcing current, incident energy, boundary and working distance explained, with three engine runs that show clearing time beating fault current every time.
- 阅读约 4 分钟Harmonics and neutral sizingWhy third harmonic current adds in the neutral of a four-wire circuit, what the 0.86 factor does, and how to apply it by hand to a cable size result.
- 阅读约 4 分钟Industrial switchboards: fault rating, form, IPWhat the three ratings on an industrial switchboard or motor control centre mean, how each one is chosen, and which AmpSize tools feed the numbers behind them.
- 阅读约 3 分钟Prospective fault current at a boardHow the fault current at a board comes from the source impedance and the submain, why the cold cable gives the maximum, and what to compare it with.
