When the zero line leaks, will the empty opening jump immediately?

In fact, the general leakage protection switch is a zero-fire current comparator, comparing whether the current of the two wires is the same, the same is not tripping if there is no leakage, and it will not trip if it is not the same, and it will not trip within the set range, and it will trip once it exceeds the limit. In this way, whether the fire is to the ground or to zero, the direct leakage or the leakage through the human body, the leakage current will be sensed and trip beyond the limit.

Therefore, the line-changing experiment described by LZ is tested on a single basis, that is, to confirm that there is an actual current that exceeds the limit leakage current value set by the leakage protector on both lines of the zero fire entering the leakage protection. On this basis, the test results can be used to judge the line situation.

The old two-wire system of residential power supply: zero, fire, no grounding wire, now the new three-wire system of residential power supply: fire, zero, ground, fire zero two lines through the meter and then through the leakage protector for the total power supply, and the ground wire can not be controlled by any way, directly connected to the residential building total ground wire grounding body, the other end is directly connected to the user socket ground.

The description of lz is vague, what kind of wire is that leaking wire is important, and the reason determines what this wire can and cannot do!

If the wire that lz said is really insulated, then how can it be used as a neutral line?

If, the wire that lz said tripped, then how was it connected? What was the original purpose of this thread?

This diagram is the schematic diagram of the leakage protector, the current enters the magnetic ring through the switch, and the magnetic flux generated by the equal current of the two lines cancels each other, and the secondary coil from the magnetic ring will not induce the electromotive force, and the protection circuit does not act. You plug in a live wire, and the secondary coil generates the maximum induced electromotive force, so the protection circuit acts.

Diagram of the working principle of the leakage protector.

If the load is not grounded and leakage, the secondary stage of the zero sequence transformer has no voltage, if the zero line has not been leaked, then as long as the load works, the zero sequence transformer only passes through the live wire, and the secondary stage of the zero sequence transformer will have an induced voltage, which makes the leakage protection detaching mechanism trip.

It's definitely tripping. This is the working principle of the leakage protector, as long as the power supply is not output by the leakage protector, as long as it is powered on, it will trip. How much current is output by the leakage protector, and how much current is returned, that is to say, the live wire flows through the electrical appliances and then comes back through the zero line to be a complete circuit, and the change of the back current will cause tripping, which is also called the tripping of the leakage current.

The principle of the leakage protector is that the neutral line of the power supply passes through the zero sequence transformer at the same time, and the output current of the transformer is zero in the absence of leakage, and when the zero sequence transformer only passes through one line, its output current will be very large, causing the leakage protector to trip.

The operating principle of the leakage protector is that when the neutral current is less than 30 mA of the live wire current, it trips, that is, the live wire sends 1000 mA current, and the zero line must come back to 980 mA. Since you didn't connect the zero wire, the live wire went to a thousand, and as a result, the loop current at the end of the zero line that leaked was zero, and it didn't jump if it didn't work.

The working principle of the leakage switch is to detect the leakage current of the connected neutral line live wire circuit, and trip protection if it exceeds the limit value.

You only connect the live wire, the neutral line does not pass the leakage protection, and the current through the live wire (which is generally greater than the leakage limit current) is detected as the leakage current by the leakage protection, so it will definitely trip.

If the electrical equipment needs to use the zero line, then there will be a current flowing through the zero line, and the zero line does not pass through the leakage switch, then the current in the zero line is the leakage current detected by the leakage switch, so it is regarded as a leakage protection trip.

When the current flowing into the leakage switch and the current flowing out are not the same [up to 30mA], it will trip. If you wire it like that, you meet the trip condition of the leakage switch.

If it is a 2P zero fire, it should be connected to the leakage switch.

The 1p one can be connected only to the live wire.

Dear, I'm glad to answer your questions, the answer to the lower zero line after the empty power off is as follows:1The electricity network connection is empty or non-standardized, there is an abnormal connection, and some parts are powered off, but the other parts are still in the state of power supply; 2.

The line is affected by displacement, damage, water leakage and other reasons, resulting in multi-channel mutual leakage; 3.There is a large distributed capacitance between the neutral line and the nearby fire wire, especially when it is very close and the parallel distance is large; This is even closer to the situation if the neutral line is shown to be live when it is turned on, but it is not when it is turned on. If the zero line is on the empty opening and closing, and the zero pulse line is charged when it is disconnected, and the use of the positive tie is auspicious, it is the following situation:

1. The live wire and the neutral line are reversed. 2. The zero line of the transformer of the power supply station is poorly grounded. 3. Use high-power electrical appliances (lower voltage, dim lights) with users who share the zero line.

If the zero line is only energized after the empty opening and disconnection, and it is not energized when it is closed, then I don't know. If you do not share the zero line within the empty open with others, it is empty leakage, try to change the empty open. There is also whether the neutral wire is connected to the public ground wire, and the ground wire is poorly grounded, and the leakage of a useful electrical appliance will also occur.

Hello, 1, the electricity network connection is not standardized, there is an abnormal connection, part of the power is off, but the other part is still in the state of power supply; 2. The line is affected by displacement, damage, water leakage and other reasons, resulting in multi-channel mutual leakage; 3. There is a large distributed capacitance between the neutral line and the nearby fire line, especially when it is very close and the parallel distance is difficult; This is even closer to the situation if the neutral line is shown to be live when it is turned on, but it is not when it is turned on. If the neutral wire is energized on the empty opening and closing, and the neutral wire is used normally, it is the following situation: (1) It may be that the live wire and the neutral wire are reversed.

2) It may be that the zero line of the transformer of the power supply station is poorly grounded. (3) It may be that the user who shares the zero line with you has used high-power electrical appliances; (At this time, the voltage is lower, and the electric light is darker).

Summary. Under normal circumstances, if the neutral line is broken, there is no electricity when the air switch is connected, because the neutral line is an important part of the circuit, it is a loop in the circuit, the current must pass through the neutral line to return to the power supply, in order to continue to flow, if the neutral line is broken, the circuit will be interrupted, the current will not flow, and it will not be able to provide electric energy.

Under normal circumstances, if the neutral line is broken, the air switch is connected and there is no backup of electricity, because the neutral line is an important part of the circuit, it is a back-roll circuit in the circuit, the current must pass through the neutral line to return to the power supply, in order to continue to flow, if the neutral line is broken, the circuit will be interrupted, the current can not flow, and it will not be able to provide electric energy.

Excuse me, but please go into more detail?

Reasons:1The wiring of the air switch is improper, and the wiring is wrong, resulting in the zero wire being broken; 2.

The quality of the air switch is not good, resulting in the zero line being broken; The solution is to refer to:1Check the wiring of the air switch to make sure it is wired correctly; 2.

Replace the air switch to ensure good quality; Personal Tips:1When installing the air switch, carefully check the connecting line to ensure that the wiring is correct; 2.

When buying an air switch, it is necessary to choose a good quality product to ensure safety and reliability; Related knowledge: The air switch is an automatic circuit breaker used to protect electrical equipment, which can automatically disconnect the electric source when the electrical equipment is short-circuited, overloaded or leakage, so as to protect the electrical equipment from damage.

The reasons for the tripping of the three-phase four-wire air opening in the middle of the large as soon as the zero line is connected may be:

Three-phase four-wire empty opening.

1. It is possible that you have not clearly distinguished whether the selected component is empty or missing?

Here the picture above is the three-phase four-wire empty open, and the bottom picture is the three-phase four-wire leakage open!

Three-phase four-wire leakage.

2. There may be leakage to the ground in the line or the live wire or neutral line in the load.

3. It may be that a single-phase load in the line is heavy, and the overcurrent causes the empty opening tripping drop.

4. It may be that there are two loads of 380V and 220V in the line at the same time, which causes the tripping caused by the three-phase current imbalance of the line.

5. It may be that there are more than two 220V loads in the same line, and the zero line used has tripped caused by the phenomenon of Zhang Guan Li Dai!

In short, you can take your time and check carefully, and you will definitely find the location of the problem! Sell vertically.

Remember: 1. Check carefully, not in a hurry.

2. Be sure to pay attention to safety during inspection!

3. It is best to be carried out by two people at the same time during inspection and maintenance, and it is not possible to work alone!!

Summary. The leakage switch is mainly used to detect whether there is leakage in the circuit, and when there is leakage in the circuit, the leakage switch will automatically trip and cut off the circuit. If the neutral line is disconnected during the detection process, then the line is disconnected, the leakage switch cannot work normally, at this time the leakage protection fails, if there is leakage in the circuit, it is likely to lead to a leakage accident, so it is necessary to repair the fault in time and restore the normal use of the line.

In addition, it should be noted that the power supply must be cut off when performing circuit inspection and maintenance to ensure safe operation.

The leakage switch is mainly used to detect whether there is leakage in the circuit, and when there is leakage in the circuit, the leakage switch will automatically trip and cut off the circuit. If the zero line is disconnected during the detection process, then the line is disconnected, and the leakage can not work normally, and the leakage protection fails, if there is leakage in the circuit, it is likely to lead to a leakage accident, so it is necessary to repair the fault in time and restore the normal use of the leakage line. In addition, it should also be noted that the power supply must be cut off when the circuit is tested and repaired to ensure the safety of operation.

The leakage switch is mainly used to detect whether there is leakage in the circuit, and when there is leakage in the circuit, the leakage switch will automatically trip and cut off the circuit. If the zero line is disconnected during the detection process, then the line is disconnected, and the leakage can not work normally, and the leakage protection fails, if there is leakage in the circuit, it is likely to lead to a leakage accident, so it is necessary to repair the fault in time and restore the normal use of the leakage line. In addition, it should also be noted that the power supply must be cut off when the circuit is tested and repaired to ensure the safety of operation.

At this time, it is necessary to check in detail whether the live wire is short-circuited, or whether the live wire is accidentally grounded, and then according to the correct connection method, the various lines of the leakage protector can be reconnected to solve the trip problem.