Why doesn t the leakage protector trip?

Since the principle of the leakage protector is that the current flowing into the leakage protector and out of the leakage protector is equal, the leakage protector will work normally, and the current flowing into the leakage protector and out of the leakage protector is not equal, and the leakage protector will be powered off.

First of all, the neutral wire and the live wire are put together, and the leakage protector.

It's not jumping. The working principle of the leakage protector is to cut off the circuit when the current of the live wire and the neutral wire is unbalanced. When the live wire and neutral wire are put together, there is no current imbalance problem at all.

In other words, when you touch the neutral line of the live wire at the same time and cause an electric shock, the leakage protector will not operate.

In the case of no load, the live wire is grounded, and the leakage protector acts.

When a loop is formed under load, whether it is a live wire grounding or a neutral wire, the leakage protector acts.

If the above two situations do not work, the leakage protector is broken.

Here the live wire to the ground and the neutral line to the ground refer to the same wire as the ground wire.

Connect or connect with the damp earth wall (sometimes because of dryness, a small area of contact with the earth wall will not cause an electric current, but the human body will form a current as soon as it is added, because the human body contact surface is more than a square millimeter.)

The contact surface of the wire is large, and the person is made of water, which is quite wet, so please pay attention to safety).

The leakage protection switch is broken.

The current leakage protector is too poor on the one hand, you can choose CHINT's products to experiment.

The choice is a bit big, you can't jump without a load, you bring a load!

Obviously electrocuted, but the leakage protector does not trip, why.

After a person is electrocuted, why does the leakage protector not trip for protection?

First, it could be a post-ampLeakage protectorIt is greater than the leakage protector of the front stage, resulting in the failure of the rear protector to trip and the trip of the front stage;

Third, it may be that the power of the pre-stage leakage protector is small, and the power consumption of the post-stage is greater than that of the pre-stage protectorCurrent rating, which causes the pre-protector to trip.

In general, the third can be more powerful, in order to ensure that the rear stage of the leakage protector is normal, you may wish to adjust the front stage of the leakage protector appropriately.

Data development

Leakage protector, referred to as leakage switch.

Also known as leakage circuit breaker.

It is mainly used to protect the equipment from leakage and personal electric shock with fatal danger, with overload and short-circuit protection functions, which can be used to protect the overload and short circuit of the line or motor, and can also be used as an infrequent conversion and start of the line under normal circumstances.

Leakage protector can be classified according to its protection function, structural characteristics, installation mode, operation mode, number of poles and wires, action sensitivity, etc., which is mainly classified according to its protection function and use, and can generally be divided into leakage protection relay and leakage protection switch.

and leakage protection sockets.

Leakage protection switch refers to not only it can be connected or disconnected from the main circuit like other circuit breakers, but also has the function of detecting and judging the leakage current. It is used with fuses, thermal relays.

The combination can form a fully functional low-voltage switching element.

It is not that the small leakage protector will necessarily be shorter than the heart beat of the continental god pants leakage protector, when there are two protectors on the circuit, which leakage protector tripping is determined according to the response time, if the response time of the large leakage protector is faster than the small leakage protector, then it will respond to the trip first.

The leakage protector is divided into the size of the leakage current, not according to the size of the switch classification, the general wild comic leakage action current is 30 milliamperes, if the leakage current of the large hail leakage protector is smaller than the small protector, so the trip is normal, if the leakage action value is the same, it belongs to the skipping trip, indicating that a protector outside the alternative ridge oak may be broken.

The following reasons will make:Leakage protectorNo tripping:

1. The neutral wire produces repeated grounding.

, it will cause the leakage protector to cause shunt rejection, and the neutral repeat grounding point is difficult to find.

2. When the power supply is out of phase, and the missing phase happens to be the working power supply of the leakage protector, there will be rejection.

From the above analysis, it can be seen that the frequency and rejection problems of the leakage protector in actual use are not only due to the objective environment and management, but also the technical misunderstanding of the leakage protector itself.

The leakage protector can be used to protect the equipment from electric shock in the event of leakage failure and the fatal danger of personal shock, with overload and short-circuit protection functions, which can be used to protect the overload and short circuit of the line or motor, and can also be used as an infrequent conversion and start of the line under normal circumstances.

Leakage protector can be classified according to its protection function, structural characteristics, installation mode, operation mode, number of poles and wires, action sensitivity, etc., here it is mainly described according to its protection function and use, and can generally be divided into leakage protection relay and leakage protection switch.

and leakage protection sockets.

Open the leakage protector and cut any of the leakage current detection coil or tripping coil wires of the leakage protector.

That is to say, there are two coils inside, and you can cut any one of the wires at will).

It's easy to destroy a leakage protector, but if you think it's worth it, do you think it's worth it?

On the surface, you seem to have solved the problem of leakage switch not tripping, but in fact, the consequences are endless, once an electric shock accident occurs, you will regret it, the fundamental solution is to seek the help of an electrician to thoroughly find out the cause of the leakage protector malfunction and repair it.

Only with the safe use of electricity can life be guaranteed.

If the leakage does not jump, then there is no need for the leakage switch, and it is directly connected to the knife switch, so that the leakage does not jump.

1.It may be caused by the repeated grounding of the neutral wire, and when the neutral wire is repeatedly installed with the ground wire, the leakage protector will be rejected due to the current shunt. When repairing, you only need to find out the duplicate ground wire and then remove it.

2.It may be caused by the lack of phase of the power supply, when the working power supply of the leakage protection cavity protector is out of phase, the protector will be rejected. When repairing, it is necessary to check the cause of the phase loss and then deal with it accordingly.

Because there are many reasons for phase loss, and it is more troublesome to troubleshoot, it is generally not recommended to do it yourself.

1. The electrical appliance comes with its own protection device, and its protection working current is less than the tripping working current of the leakage protector;

2. The maximum working current that the power cord connected to the electrical appliance can withstand is much less than the tripping working current of the leakage protector, and in the event of a circuit failure (short circuit), the power cord connected to the electrical appliance is burned out, and the electrical appliance is of course powered off, and the leakage protector has not tripped.

3. The first of the above two reasons is a high probability of occurring. Generally speaking, there are two types of electrical protection methods, one of which is the power-off protection that can be semi-automatically reset, such as automatic tripping and power-off, after the circuit is tripped, the manual (button) re-reset will restore the normal connection of the circuit. This is widely used because of its convenience in the process of use.

The second is the fuse (tube) class, this type of protection device can not be automatically reset, because after the circuit failure, the fuse (tube) is burned off, and the fuse (tube) can be manually replaced in order to continue to connect the power nucleus normally. This kind of protection device is very inconvenient in the process of use, but the cost is low, the economy is good, so it only rarely appears in some electrical circuit protection, of course, it was commonly used in China 20 years ago.

4. The second reason is a small probability of occurring, because of this reason, it means that the leakage protector cannot play its due protective role, and it does not meet the requirements of electrical installation and use.

It may be that the circuit is short-circuited, causing the power brake to start the protection function, it is recommended to check the line.

Generally, every month, press to simulate the leakage of electrical appliances. If it trips, it means that the leakage is normal. Just push the empty open up again.

If there is a square button in the lower right corner of the leak protection, you need to press the switch to push it up. The button pressed once a month on the switch is for testing, and the switch has an automatic power-off protection function, and the purpose of pressing it once a month is to relieve the tension of the spring inside and maintain the sensitivity of the switch.

It is tested for reliability once a month. Because the leakage insurance is closely related to the safety of electricity, the leakage insurance fails, and the leakage will not be able to play a protective role, so it is necessary to try to press once a month, if the leakage insurance does not trip when pressed, the leakage insurance needs to be replaced immediately.

The function of the electric switch: 1) After the switch, establish a reliable insulation gap, and separate the equipment or line that needs to be repaired from the power supply with a clear disconnection point to ensure the safety of maintenance personnel and equipment.

2) According to the needs of operation, change the line.

3) It can be used for small currents in the distribution and merging lines, such as the charging current of bushings, busbars, town connectors, short cables, the capacitance current of switching equalizing capacitors, the circulation current when the double bus is replaced, and the excitation current of the voltage transformer.

4) According to the specific situation of different structure types, it can be used to divide and combine the no-load excitation current of a certain capacity transformer.

The above content reference: Encyclopedia - electric switch.

1. The leakage protector is damaged, and the leakage current does not reach the action value of the leakage protector.

The leakage protector will not trip when leakage occurs, and will only trip when the leakage current exceeds a certain value to avoid misoperation. Generally speaking, the working current of a household residual current circuit breaker is 30mA. The trip time of the leakage circuit breaker is within the limit.

Therefore, when we are usually slightly electrocuted, the leakage protector will not trip – the current is less than 30mA when the electric shock occurs. However, low current does not mean that there is no pain. Especially for children, their bodies are able to withstand an absolute current of less than 30mA, which most likely will not trip until it poses a life-threatening death.

2. The magnitude of the electric shock current is also related to the resistance of the human body.

Strong muscles and thick calluses help to increase the resistance and, correspondingly, can also withstand greater voltages.

3. There are generally two kinds of electric shock that may cause non-tripping:

A person touches the line of fire on the ground.

The line of fire, the people, and the earth form a loop. At this time, it belongs to leakage, and the leakage protector will trip (the leakage current reaches the current intensity of the leakage protector tripping, generally 30mA, if it does not reach 30mA, the leakage protector will not trip, but at this time, the person feels electrocuted and can still break free).

When people stand on an insulated object or wear insulated shoes.

When the human body comes into contact with two live wires or one live wire and one neutral wire at the same time, the human body is equivalent to an electrical appliance. Since there is no current leakage in the circuit, the leakage protector of the punch excavator will not trip.