How much amp is the household air switch, and how to choose the household air switch?

Air switches play a protective role in the home, for example, when your home's electricity consumption is too high, it can play a role in cutting off the power. The air switch is used as a main power protection switch or branch line protection switch in the home power supply. When there is a short circuit or overload in residential lines or household appliances, it can automatically trip and cut off the power supply, so as to effectively protect these equipment from damage or prevent the expansion of accidents.

Households generally use a two-pole (i.e. 2P) circuit breaker for total power protection, and a single-pole (1P) for branch protection. If the rated current of the circuit breaker is selected to be small, the circuit breaker is easy to trip frequently, causing unnecessary power outages, if the selection is too large, the expected protection effect cannot be achieved, so it is very important to correctly select the rated capacity current size of the home improvement circuit breakerGenerally, the specifications of miniature circuit breakers are mainly divided into 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, etc.

The principle of selection of home air switches is still based on the maximum operating current. That is, the maximum current that can be set by the selected air switch is greater than or equal to the total power.

Suppose the total power of electrical appliances: the family has 2 air conditioners (4500w water heaters (2000w electric porcelain stoves (1600w computers (500w), 1 refrigerator (600w), 2 TVs (300w).

Total power = 4500 * 2 + 2000 + 1600 + 500 + 600 + 300 * 2 = 14300w

The formula for calculating the total power is: P=UICOS I=P UCOS is launched

Current of the line: i = p ucos = 14300 220*

The maximum setting current of the selected air switch is 63A, which is greater than the total working current of 52A, which is in line with the selection principle. Theoretically, this calculation is correct, but there is a problem. The average household capacity is only 5kw, and it is impossible for them to work at the same time.

According to the above calculation method, the switch cannot play the role of overload protection. The entrance line of the residents of the building is generally the same, and it is basically impossible to reach this level after cutting corners. If it can meet the standard, it is a current of 32A.

Therefore, it is very dangerous to open all the backup large switches, and burn the switch and burn the wire. It is recommended to calculate according to the capacity of the household, and choose between 20a and 32a.

At present, Beijing generally uses DZ47 (white is DZ47, black is DZ10, DZ10 has been basically eliminated now, but there are still some areas to use) air opening or this is called air circuit breaker.

The total air opening in the room is bipolar, without leakage protection, only the bathroom, kitchen, bedroom, living room socket must be selected leakage protector. At present, there are many counterfeit and shoddy products on the market, and it is best to choose the abb brand, which is more expensive (20A leakage of more than 100 yuan for a genuine product).

The lighting is generally 10A monopole, while the living room socket and bedroom socket are generally with leakage protectors (the new specification requires that leakage protectors must be used). The air conditioner is generally single-designed, and the power supply is supplied with a single-pole air switch.

Home use is now generally 60a, if you want to describe it (1 computer, not 11), 40a or 32a.

Extended Materials. An air switch, also known as an air circuit breaker, is a type of circuit breaker. It is a switch that automatically disconnects whenever the current in the circuit exceeds the rated current. The air switch is a very important electrical appliance in the low-voltage distribution network and the power drive system, which integrates control and a variety of protection functions.

In addition to completing the contact and breaking circuits, it can also protect the circuit or electrical equipment from short circuits, serious overloads and undervoltages, and can also be used to start the motor infrequently.

Common faults. Tripping: First of all, determine whether the tripped air switch is the main switch in the distribution box at home or the shunt outgoing switch.

If the main switch is not tripped, but the shunt switch trips, it means that there is a problem with the wiring of the power supply line of the high-power electrical appliance, that is, a plurality of high-power electrical appliances are connected to the same shunt switch.

If the shunt switch does not trip and the main switch trips, calculate whether the sum of the power of household appliances exceeds the approved capacity of power supply, and check whether the total switch capacity matches the approved capacity of power supply.

If the sum of the power of household appliances exceeds the approved capacity of power supply, reduce the number of household appliances used at the same time (especially high-power household appliances) and apply to the power supply company for capacity increase;

If the sum of the power of household appliances does not exceed the approved capacity of power supply, but the total switching capacity is less than the approved capacity of power supply, the main switch that matches the approved capacity of power supply shall be replaced. At the same time, it should be reminded that the starting current of some high-power electrical appliances is large, and the impact of the starting current should be considered when calculating the power.

Optional: total 20A leakage + overload protection switch, plug in 10A, shine 10A, although the size of the wire is related to the switch, but the design is generally considered separately.

The lighting circuit normally uses a 10A air switch, the socket line uses a 16A air switch, the water heater and air conditioner use 20A or 25A, and the main switch uses 63A.

Households generally use a two-pole (i.e. 2P) circuit breaker for total power protection, and a single-pole (1P) for branch protection. If the rated current of the circuit breaker is selected to be small, the circuit breaker is easy to trip frequently, causing unnecessary power outages, if the selection is too large, the expected protection effect cannot be achieved, so it is very important to correctly select the rated capacity current size of the home improvement circuit breakerGenerally, the specifications of miniature circuit breakers are mainly divided into 6A, 10A, 16A, 20A, 25A, 32A, etc. by rated current.

C32 should be selected on the specifications and models of household switches, C32 means that the rated current of the circuit breaker is 32A, and there is no problem with the water heater used for it. 2 400V circuit breakers are used on three-phase circuits, while 230V circuit breakers are used on single-phase circuits. The 4500A or 6000A behind the circuit breaker model refers to the rated breaking current of the circuit breaker, and for household circuits, 4500A and 6000A are OK.

The plugs of regular electric water heaters are equipped with leakage protection, so that leakage protection can not be installed on the circuit breaker.

Answer: Hello for reference only, I hope to help you, At present, the family uses the air switch (small circuit breaker with leakage protection) of the DZ series, and the common models are the following specifications: C16, C25, C32, C40, C60, C80, C100, C120, etc. When choosing the model of the air switch, it is not that the higher the rated current value, the safer, if the rated current is too large, the expected protection effect will not be achieved.

However, if the rated current is too small, the air switch is prone to frequent tripping, causing unnecessary power outages.

Pay attention to the details of the purchase of air switches: 1Let's start by looking at the weight of the air switch.

Generally speaking, the shell of the high-quality air switch is flame retardant PC plastic, and the inside is pure copper wire, and the more turns there are, the better the quality. 2.Then look at whether the switch surface has the IEC logo.

CCC certification, Great Wall certification, PICC quality certification, whether there are GB10963D and other marks. 3.Secondly, when purchasing a household air switch, you also need to look at the internal arc extinguishing cover.

The arc extinguishing cover is used to extinguish the arc generated when the circuit is short-circuited or overloaded, and if the arc cannot be extinguished smoothly, it is likely to lead to a fire, so it is necessary to choose an arc extinguishing cover with excellent quality.

It is best to choose the medium switch, because this kind of switch is easy to touch, and it is also very good to turn off, and the model is also to choose the medium, and then you must not choose the kind of particularly small, because that is too small and sometimes may not be pinched, these are to pay attention to.

Choose the size of the normal model, choose a large or small size according to the current used in the home and whether the house has large furniture. It should be noted that when the current power used in each room is different, it should be equipped with different air switches.

Is it wrong to choose this large size for the model of the switch? The first point is that the whole switch must master the most basic switch skills, the second point is to master the details of the whole switch, and the third point is to pay attention to the maintenance of the entire circuit.

Generally 30a is fine.

The general household air switch should be selected Z-47 series, that is, the air opening of Z-47 C63A, the main switch of the control of each floor with C-45 C 32A leakage protection, and then use the output of this leakage protection to tap the control socket, lighting, air conditioning and other buried Xiang branch control switches, bend the front and the leakage protection of this C32A and the air opening under the sub-base scatter circuit, according to the total power of the electrical equipment connected to the working current of the number behind it.

times (no more than 2 times) of the working current optional it "c after the number" (that is, the current rating), lighting, air conditioning, etc. shunt control "air open": household power supply total control box wiring diagram, should be selected model "z--47 series", should be connected to the total power of the electrical equipment 1, to control the total power supply of a certain floor.

To choose 40A air opening.

According to the total power of the respective household electrical equipment, the selection principle is based on the maximum working current, so the air switch model selected by different household appliances is different. The following models are common for home use of air switches: C16, C25, C32, C40, C60, C80, C100, C120, etc.

For example, C40 means that the starting current is 40 amps, and the C32 switch is used for the installation of water heaters less than 7500W, and the C40 switch is used for the installation of water heaters above 7500W.