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PaulSB10 This will only measure AC volts and amps. for DC you need a current shunt. the CB will also have issues to measure DC short circuits.

2022-07-30 07:44:59 Hilfreich (0)
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PaulSB10 In a healthy system the live and neutral will have an identical current. A core balance current transformer inside the MCB summates the two curents 180 deg apart to zero. As soon as either the L or N leaks to current to earth the two current will no longer be equal and the core balance current transformer will now output this current difference and if it excedes the EL units value say 30mA the unit will open the circuit.

2022-05-26 11:30:23 Hilfreich (4)
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