Why does the wire fire leakage switch not trip?

When the wire is short-circuited, the instantaneous current in the circuit reaches the action current of the leakage switch, the leakage switch action, disconnect the circuit, the wire fire is obviously not caused by a short circuit, so the leakage switch does not trip;

When the action current value of the air switch or leakage protector is far greater than the safe current carrying capacity of the wire, then even if the wire is on fire, the air switch and the leakage protector will not trip, because the action current is not reached.

The leakage protector mainly plays the role of leakage, overload, and short circuit, which will cause tripping.

Your situation is either caused by the wire is too small and the rated current of the leakage protection is large and overloaded; or a fire caused by poor wire contact.

Now the miniature circuit breaker plus the leakage protector becomes a small leakage circuit breaker, the leakage function is mainly to prevent electric shock, the circuit breaker part has overflow speed cut, long-term overload tripping, and other functions.

So why the wire fire leakage circuit breaker does not work, the analysis may be that the rated current of the selected circuit breaker does not match the safe current carrying capacity of the wire, and the wire is overloaded, but this current has not exceeded the rated current of the circuit breaker, so the circuit breaker does not trip.

In fact, the circuit breaker is used to protect the wire, because the overload of the wire will lead to a disaster accident, so we must consider the wire current carrying capacity first when choosing the circuit breaker.

The principle of leakage switch tripping is: there is a difference between the live wire current flowing through the switch and the neutral line current, and the difference exceeds a certain value (usually the household leakage protection switch is 30mA).

If the live wire or neutral wire is grounded and not tripped, most likely the leakage protection switch has failed and should be replaced in time.

Generally, there is a test button on the leakage protection switch, and you can press the button to see if it will trip to easily judge whether the leakage protection switch is invalid.

If there is a problem with the circuit in front of the leakage protection, the leakage protection will not trip.

The neutral wire is grounded, the ground wire is not compliant, the resistance to the ground is large, and it does not trip when the electricity is not used.

The live wire is grounded, does not trip, and the leakage protection switch is broken.

1. First of all, the so-called grounding is to form a discharge to the ground, not to the ground will trip, for example, the line will not trip when it touches a dry wall and cement floor, only the wet cement ground or wet earth will form a discharge, causing tripping. (The leakage current does not reach the action value, resulting in no tripping).

2. The leakage protector may fail, and it will not trip.

The zero wire is grounded, there is no problem for the live wire to go back from the zero line, the live wire is grounded, and the neutral line is grounded, and the leakage protector may not be tripped.

The principle of the leakage switch is that the current of the live wire passes through the leakage switch, and it will jump without going back through the zero line, based on this principle, if the live wire is grounded, there is no current flowing, and the air will not trip.

Ordinary leakage switches are all electronic leakage switches. It has two working conditions:

There should be an operating voltage, that is, the switch should have a voltage of 220V.

The bottom should have a leakage current. You look at your question, do you meet both of these conditions? Therefore, after the center line is broken, the leakage switch cannot achieve any protection function.

Grounded, but if you don't have the power on, you will definitely not trip, or your leakage protection switch is faulty.

The switch is inherently problematic so it won't trip, and there's another one that isn't completely grounded, so it won't trip.

The grounding is broken, and the leakage switch is of course not tripped.

Lines of Fire and Connections aren't together, so they won't.

Dear, I am glad to answer for you: why does the leakage switch not trip when it is connected to electricity? A:

1. It is very likely that the working current of the electrical appliance is less than the current of the leakage protector tripping, so it will not cause the leakage switch to trip in the process of use. This situation is relatively common, if there is a circuit fault caused by tripping, you can manually reset it, so that the circuit can be restored. 2. It is also possible that the maximum current that the power cord that connects the wires can carry is far less than the tripping current of the leakage protector, so even if there is a short circuit in the first circuit, the leakage protector will not trip, but the electrical appliances will be power-off.

This phenomenon is relatively rare, indicating that the leakage protector used can not play a protective role, and the installation does not meet the requirements of use, and a suitable leakage protector needs to be replaced. I hope mine can help you, I wish you a happy life, if mine is helpful to you please give me a 5 star praise Oh, thank you for your support to me.

1.The rated action current of the air switch is too large and the maximum allowable current of the line does not match, and the line has not been short-circuited or has not reached the action current value of the air switch when it is overloaded or partially burned for a long time, so it does not operate. 2.

The air switch does not have a leakage protection function, so if the wire is not burned due to short circuit or overload, the air opening will not be activated in advance (including the combustion process is not short circuited). 3.Air switch quality problems.

The wire is short-circuited and on fire, why is it empty and not tripped?

The reasons are as follows: one. Air switch.

It is a very important electrical appliance in low-voltage distribution network and power drive system, which integrates control and a variety of protection functions. In addition to being able to complete the contact and breaking circuit, it can also protect the circuit or electrical equipment from short circuit, serious overload and undervoltage, etc., under normal circumstances, the armature of the overcurrent tripper is released; In the event of a serious overload or short-circuit fault, the coil connected in series with the main circuit will generate a strong electromagnetic attraction to attract the armature down and jack the locking hook, so that the main contact is disconnected.

Two. The selection of air opening is very important, and the general household miniature circuit breaker (DZ47 series) should be the maximum current carrying capacity of the wire.

Otherwise, it will not play an overcurrent protection role caused by short circuits.

The wire fire has nothing to do with whether the air open trips, the normal air open only when the current on the line below it is greater than its rated current or the line temperature reaches its protective action value, and the air open will not act if these two conditions are not met. Now there is a kind of protection device called fire leakage alarm, which is the first road leakage fault is about to lead to a fire before the alarm signal is issued, and it can also be linked to cut off the circuit to prevent fire.

Short circuit caught fire and did not trip? It's almost impossible! Now there are several floors of commercial houses that are empty!

First of all, there will be an empty opening when the meter comes out, and there will be a total opening after entering the house, and there will be a number of functions in each area after the total opening. If there is no empty opening tripping after a short circuit, then your empty opening is too big, but at least the empty opening behind the meter will not be big!

Therefore, it is most likely to be an overload caused by a fire!

When there is a short-circuit of the line and fire, the reasons for the air switch does not trip: first, the empty opening capacity is too large, and the short-circuit current can not cause tripping. Second, the empty opening failure, stuck stagnation caused by tripping failure. The third power supply line is too long, and the cross-sectional area of the line is too thin.

That is the kind of empty open that does not have short-circuit protection, or it may be that the air-open short-circuit protection circuit is faulty. will form a short circuit without tripping phenomenon.

It is possible that the air switch does not match the power of your home, resulting in the short circuit current of the wire being less than the air trip current but not tripping; It is also possible that the empty opening failed and did not trip.

1. If the air opening fails, it will not automatically trip and lose its protective effect.

2. The empty open configuration is too large, and the slight short circuit of the line is that the short circuit current is less than the action current of the empty open, and the empty open will not trip.

The wires are all on fire, why didn't they trip when they were empty? Old electrician: It is very important to match the air and wires.

1. The rated action current of the air switch is too large and the maximum allowable current of the line does not match, and the line has not been short-circuited or has not reached the action current value of the air switch when it is overloaded or partially burned for a long time, so it does not operate.

2. The air switch does not have the function of leakage protection, so if the wire is not burned due to short circuit or overload, the air opening will not act in advance (including the combustion process without short circuit).

3. The quality of the air switch.