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Check whether the zero wire and the ground wire are connected to the tower, and be sure to disconnect the live wire, zero wire, and ground wire that come in from the outside, because where is the distribution box, the zero wire and the ground wire are connected together, and the household appliances must be disconnected, because the household appliances are most likely to leak to the zero line or live wire.
The possible reasons are, such as live wire leakage, zero line leakage, electrical leakage, zero line tower ground wire, etc.
If it is a dark line, it is difficult to solve, 1. First disconnect the electrical appliances that are easy to ground, such as washing machines, refrigerators, etc., to see if the electrical appliances are leaking; Secondly, check the kitchen, bathroom and other sockets that are easy to get wet, and see if there is any touch or dirt in the socket; 3. See which branch road it is happening on.
If you really can't find it, you don't need a leakage protector, use an ordinary air switch, and install a ground wire in a home, you can use a leakage protector. Be sure to use a leakage protector, don't use the ground wire, just disconnect the ground wire.
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The main gate uses leakage air opening, so after the ground wire contacts with the neutral line, it causes the leakage air opening action to trip. This is normal protection. After troubleshooting, reset it again and close it.
The air opening of the living room and bathroom is just an ordinary air opening, so it is normal that the neutral line will not cause a protective action after contact with the ground wire.
Under normal circumstances, the sockets in the kitchen, living room and bathroom should be protected by leakage air opening alone. Avoid the occurrence of one leakage affecting the electricity consumption of the whole house.
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Neutral line live has the following hazards:1. When the zero trunk line is broken, due to the neutral point drift caused by load asymmetry, the one-phase voltage of the light load will rise, and when the rated voltage of the electrical equipment is exceeded, the life of the equipment will be shortened, and when it exceeds too much, it will even damage the equipment, and the "group explosion" of household appliances and lighting will occur.
2. When the zero trunk line is broken, the heavy-duty phase voltage decreases, the three-phase voltage is unbalanced, the use of electrical equipment cannot reach the normal output, the starting current of the motor increases, the starting difficulty is difficult, the motor is seriously heated, the incandescent lamp is dim, and the fluorescent lamp cannot start.
3. When the zero line is broken, it is easy to misjudge that the equipment is not charged and an electric shock accident occurs because the equipment cannot work.
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If there is a leakage switch, it may trip power; If the total zero line is broken, your leakage zero line may become electrified; Some meters will also go faster due to zero line leakage ==
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The consequences are unimaginable. Because of leakage, the meter will charge the bill, and leakage is unsafe, so it should be wrapped.
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If it's not connected to the firewire, there's basically no need to be afraid.
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If the neutral wire and the ground wire are connected, the leakage will trip. When the three-phase load is balanced, the neutral line is actually equipotential, that is, there is no voltage, but the three-phase load in the actual circuit cannot be absolutely balanced, so the neutral line has a voltage, and this voltage has a current after the ground wire is connected, which is equivalent to a short circuit in the circuit, so it will trip protection.
When the neutral wire and the ground wire collide together, the current that should be returned from the neutral wire flows away from the ground wire, resulting in an imbalance between the incoming current and the return current, and the positive and negative cannot cancel each other out, and it will trip.
The connection of the neutral wire and the ground wire will affect the neutral current of the leakage switch, and the switch will trip when the phase and neutral currents are inconsistent.
If it is a neutral tower, there is no load and it will not trip when it is energized.
If it is a neutral line tower, there is a load on the power, and the leakage protector will trip, and the air switch will not trip. The air switch of the ann will trip, and it is the live wire tower ground or tower zero.
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1. When the leakage of the zero line causes tripping, we need to check the cause of the leakage of the zero line first, and then deal with it. We can connect a consumer with more than 300 watts to a user at the very end of each line branch, and then start the consumer for testing.
2. If the test is carried out at the end of one of the line branches, and the leakage circuit breaker does not trip, then it means that the line is not faulty, and then you can continue to test other line branches until the faulty line is found.
3. When it is found that the end of one of the line branches will cause the leakage circuit breaker to trip during the test, then it means that the line is faulty, and then we should continue to check each user one by one.
4. When it is found that the leakage circuit breaker does not trip, it means that it is the previous user who caused the leakage of the zero line. The treatment method of zero line leakage trip needs to be selected according to the damage of the zero line. If the neutral wire is broken, then just reconnect the disconnected wire.
5. If the zero line is seriously damaged, then it is necessary to replace the problematic zero line with a new zero line, and then connect it with each line. If the damage to the neutral wire is not serious, then it is enough to use insulating tape to cover the damage.
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Simple elimination method of zero line leakage.
When the residual current action protector frequently trips and does not lock, the zero line leakage is the main reason. When a color TV, refrigerator or large-capacity household appliance is started or stopped, once the zero line leaks somewhere, the protector will trip frequently.
If the electrical load is relatively stable, the protector does not trip or the number of trips is small, and the protector is not locked when it trips under normal circumstances.
When the zero line leakage occurs in the protection area of a protector, the electrical equipment of 300 watts and above can be connected to a user at the end of each branch line and started up for testing.
If the protector trips during the test at the end of a branch line, it means that the fault point is on this branch line, and the house can be checked forward. When it is found that the boot protector does not trip, the fault point is in the previous household that has been checked.
On the contrary, if the user boot protector at the end of a branch line does not trip, it means that the fault point is not on this branch line.
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Hello this friend, you can use the instrument test, for example, you use a leakage meter to rule it out. Now there is a meter that can be tested.
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You can use an external meter to drain the electricity, and this kind of card store is basically very easy to operate.
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If the zero line is leaked, the power should be cut off immediately, and then a professional electrician should be asked to eliminate it.
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The situation of leakage in the zero line must be that the fire line is not settled, and the fire line can be checked directly.
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If there is a leakage, it must be cut off and a new wire installed.
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Don't do it yourself, find some relevant electricians, because he is more professional, they will definitely know what the reason is.
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Zero line leakage will only occur when the three phases are unbalanced, and it is good to divide the narrow current.
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Well, about this zero line leakage, the shot is the one with a multimeter, and it can't be measured with a multimeter, otherwise it's not easy to measure.
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Then you have to take the electric pen and let him try, otherwise there is no other way.
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How to eliminate the leakage of the zero line, you should be able to buy that kind of voltage tester, this should be able to know that ** is leakage.
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Generally, it should be the leakage contact of the two-phase line to cause leakage, and the contact between the live wire and the neutral wire can cause leakage.
1.First, use an electric pen to find the live wire (the line that the electric pen lights on), connect the end of the bulb to the live wire, and name the remaining two wires: Line 1 and Line 2. >>>More
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. >>>More
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There must be, because it is a wire, and any wire has resistance, but it will affect its resistance value per unit length due to the material relationship of the wire.
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