How to quickly distinguish between an air switch and a leakage protector!

First, quickly distinguish: three in and three out are air switches, and four out are leakage protectors (beware of lightning protectors are also four out, but there is no place to grasp them).

For fixed electrical appliances such as lights and air conditioners that are not often plugged and unplugged, if they are not working in a humid place, they should be turned on empty.

Second, for the sockets in the kitchen and bathroom, use a leakage protector because it is wet.

Third, in principle, the air opening means that as long as the current flowing through does not reach the upper limit of the air opening, it will not jump, even if it leaks.

In principle, the leakage switch is that no matter how big the current is flowing, it will not trip (so big that it burns), and the leakage will jump if it exceeds the allowable value, the principle is that the current of the two wires is subtracted, and it will not act if it is less than the allowable value, and it will jump if it exceeds it, so the leakage switch must have a loop, and the empty opening can only control one line.

1. Leakage protector.

There is a leakage test button, air switch.

No. Remember that after pressing, some brands of leakage protectors must be reset before they can be powered. The leakage protector that needs to be duplicated has a clear indication of leakage protection action.

2. The air switch is used to quickly break the power supply, and the leakage protector can break the power supply when the power supply is leaked at a small current while quickly breaking the power supply, so as to protect the safety of people and equipment. Generally, the leakage current for household use is 15mA, and the mechanical leakage current is 30mA, and the total power supply can be appropriately larger, which is determined according to the load situation.

3. Generally speaking, in order to achieve the purpose of protecting personal safety, secondary protection should be configured. That is, from the position of taking the power supply, there are two sets of leakage protection switches above each electrical appliance.

4. Use a leakage protection switch with less leakage current in a humid position.

It is very simple to distinguish between leakage and air switches, and the leakage protector has a test button, and it is not open empty. The leakage protector also has three inlets and three outlets, and the motor is dedicated. There are also ** quad motors, which can be used for lighting.

Then there are the single household ones. Where there is a risk of electric shock, use a leakage protector. Generally, electrical appliances and electrical equipment with metal shells should use leakage protectors.

Electrician knowledge: how to distinguish between an air switch and a leakage protector? What's the difference?

First, the composition is different.

1. Air switch: It is composed of auxiliary contact, alarm contact, shunt tripper, undervoltage tripper, electric operating mechanism, rotating operating handle, extended handle, and handle locking device.

2. Leakage protector: The leakage protector is mainly composed of detection elements, intermediate amplification links, and operation execution structure.

Second, the appearance of the logo is different.

1. Air switch: Air switch usually has some obvious identification, such as C20A, D32A, etc.

2. Leakage protector: The leakage protector is usually attached with the logo of 30mA, which is the leakage trip limit, and the air switch is not.

Third, the characteristics of the button are different.

1. Air switch: The air switch is only a high-current air isolation switch, which is usually made into a composite switch.

2. Leakage protector: There is an additional leakage test button and a reset button after leakage tripping on the leakage protector.

As can be seen from the buttons, the leakage switches have an experimental button.

There is an experiment button on the outside of the leak insurance!

How to distinguish it:

There is a test button on the leakage protector and a leakage action current. The air switch doesn't have either of these things.

Leakage protection two functions:

1. When the human body is electrocuted, the current flows to the earth through the human body (this current is very small, about 25mA), it can detect and cut off the power supply.

2. When the equipment or line is short-circuited, the current is very large, which may cause disasters or electrical damage, etc., it can also detect and cut off the power supply.

The air switch only has the second function of the leakage switch;

Therefore, the applicable location is very clear: the home is generally to install a leakage switch, and when there are handheld electrical appliances (such as handheld electric drills, grinders, electric hammers, etc.) at the construction site, there are generally conditions to install leakage switches. In short, the leakage switch is used where someone may come into contact with it.

Everything else is switched on and off with air.

In circuit diagrams, air switches and leakage protectors are usually represented by specific symbols:

Air switches (also known as circuit breakers) are usually made to make the early to be represented by the following symbols:

A rectangular box with a vertical line in the middle, indicating the location of the switch.

There may be additional lines above the rectangular box to indicate the position state of the switch (for example, off or on).

Leakage protectors are usually represented by the following symbols:

A rectangular box with an oblique "V" symbol inside to indicate the device of the leakage protector.

Above the rectangular box, there may be a line on the outside of the rectangle indicating the state of the protector (e.g., normal or triggered).

When the circuit is modified, we all know that we need to install an air switch, but there is also a leakage protection switch in the home circuit.

Let's talk about the commonality first, well, it's all switch.

Let's talk about the difference, the empty opening is the automatic tripping when the wires at home are short-circuited or the electricity fails, and the leakage protection is tripped when the person has an electric shock accident. The key to the two is that one is to protect electricity, and the other is to ensure personal safety.

Therefore, the current capacity of the air opening can be large or small, but the leakage protection should be smaller, after all, the human body can not withstand much current. From this point of view, it is clear that these two switches cannot be replaced by each other.

In addition to the difference in the purpose of security protection, the two are actually obviously different in principle.

When the current is normal, the current of the live wire around the electromagnet is equal, but the direction is opposite, and the electromagnet has no magnetic force. When a person is electrocuted or an electrical appliance leaks, only the live wire will pass through, and the switch will be disconnected after the electromagnet generates a magnetic force.

It can only work in the event of leakage and electric shock, and circuit overload is completely impossible.

When the current exceeds the specified number of loads, the air open will automatically trip, which plays the role of fuse protection.

The current action value of the two is also different, and the leakage protection can be said to be a kind of air opening, but its value is lower, which is milliampere level, and air opening is ampere level.

The two must not be mixed! If the workers at home pretend to be messy, tell him to get out.

In daily life, everyone will use leakage protection switches and air switches, although it is a very common thing, but not many people know about it, so today I want to introduce to you the difference between leakage protection switches and air switches? What is the function of air switches and leakage protectors? Let's find out.

In daily life, everyone will use leakage protection switches and air switches, although it is a very common thing, but not many people know about it, so today I want to introduce to you the difference between leakage protection switches and air switches? What is the function of air switches and leakage protectors? Let's find out.

1. The difference between leakage protection switch and air switch

1. Air switch.

The air switch is the neutral line and the live wire work, if the current between the two wires is too large, it will automatically trip, and the effect is the same as the fuse;

The air switch is used to prevent short circuits or overloads on the line. As long as the line is short-circuited or overloaded, it will trip, and it will not trip if it leaks;

The air switch is a switch that controls the electrical circuit, and if the air is used as the arc extinguishing medium, it is called the air switch. Generally, it is selected by the rated current (load) and used as the main switch of the electrical circuit.

2. Leakage protection switch.

If a person touches the live wire, then through the human body and the earth to form a loop, there is an additional current that does not pass through the zero line, the electromagnetic device inside will be automatically triggered, and it will also trip, and the power will be cut off immediately to protect the human body;

When an air switch has a leakage protection function, it is called a leakage protection switch. The principle of determining whether there is leakage is based on the fact that the current flowing in and out of the switch must be equal, otherwise it is judged to be leakage. When the leakage current reaches and exceeds a certain degree, the protection action --- trip;

If it is used for the purpose of personal safety protection, the leakage current is less than 30mA, which is considered safe, and if it is greater than 30mA, it is considered unsafe and will produce a protective action. The leakage protector or protection switch with a rated current of 30mA for leakage protection belongs to the leakage protector or protection switch with the same sensitivity. The production protection action time should also be within seconds.

2. What are the functions of air switches and leakage protectors?

1. As long as the function of the air switch is to pull the gate with the load, send the gate, and the load will trip and cut off the power if it exceeds its own load.

2. As long as the function of the leakage protector is that it will trip and cut off when the output circuit leaks, it can also pull the brake with load and send the brake, but the number of times is limited, and it will not trip and cut off the power if it exceeds its own load, and it is better to use the two.

The difference between leakage protection switch and air switch and what is the function of air switch and leakage protector will be introduced to you here, I hope it can help you. From the above, it can be known that the leakage protection switch and the air switch should be matched together, so that the electricity will be safer.