Will The Leakage circuit breaker trip?
The leakage circuit breaker is only connected to the live wire and not connected to the neutral wire. This practice is often used by electricians in the field to detect leakage faults: when it is confirmed that there is leakage in the line (circuit breaker is due to leakage trip (after trip). The reset button is highlighted. If it can be determined that the appliance is ok, it can be determined that there is leakage on the line)，Remove the neutral wire of the load and close for testing.
If the leakage circuit breaker still trips at this time, it proves that the live line is leaking; if the leakage circuit breaker is no longer tripped, it proves that it is a Neutral line leakage - at this time, you can answer the question in the question: “Will the Leakage circuit breaker trip? If just connected to the live wire and not connected to the neutral wire.” The answer is: if there is leakage on the live line, it will trip; as long as there is no leakage on the line, it will not trip.
The principle Of Leakage protection
To explain it in briefly, why come to the conclusion that the principle of the leakage protector is very simple, that is, to compare the current on the live wire and Neutral line. Normally, the neutral and live wires are closed loops, so the currents should be the same.
In the event of a leakage, a line forms a new circuit with other conductors. For example, it may be better to understand that when there is no leakage on the line, the current on the Neutral line and live line is the same, and it is all I1. When the live line forms a new circuit with other conductors, there will also be current on this new circuit. The magnitude of this current is I new.
At this time, the current on the live line is I1+I new, and the current on the Neutral line is still I1 - it is obvious that the two are not equal. At this time, the leakage protector will think that there is leakage in the line, so the automatic tripping (that is, tripping).
If the load terminal of the Leakage circuit breaker is not connected to the neutral line, the current on the neutral line measured by the leakage protector is always 0. If there is no leakage on the fire line, because there is no neutral line, only one line can not form a closed loop - there is no loop, and naturally there is no current, so the current on the line is also zero. The neutral line is equal to the current on the live line, and the leakage switch does not trip!
However, if there is leakage on the live line, the live line forms a new circuit with the other conductors, and a new current is generated. Therefore, the current on the line is no longer zero, and the earth leakage switch will naturally trip.
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