I. Specifications and models of common air switches in the home
At present, DZ series air switches are used in China, which are commonly used as follows: C 16, C25, C32, C40, C60, C80, C 100, C 120, etc. , where c stands for tripping current, that is, takeoff current. For example, C32 stands for 32 A takeoff current, which is generally installed at 60 A. ..
Second, the specifications and models commonly used in industry.
The types of DW and DZ of power lines are 20, 32, 50, 63, 80, 100, 125, 160, 250, 400, 600, 800, 1000 ...
Three, the commonly used specifications of wall switches are as follows:
Type 86 switch: This is the most common wall switch size, with a square appearance and a size of 86 mm× 86 mm This switch is usually called Type 86 switch and is also the most commonly used switch in engineering and home decoration in most parts of the country. Type 86 is an international standard, and many developed countries are equipped with Type 86.
1 18 switch: generally speaking, it refers to a horizontal bar switch, which is generally a free combination type: it is composed of different functional modules in the frame, and is widely used in Chongqing, Hubei, Guangxi and other places all over the country. 1 18 switches are generally divided into small boxes, medium boxes and large boxes in the electrician list. The length is 1 18MM, 154MM, 195MM, and the width is generally 74MM, 1 18.
120 switch: the panel size is generally 120mm× 120mm or similar, and there are some extended products, such as three-position, four-position and four-position, one of which is 74mm× 120mm, and the installation hole spacing is 83.5mm This product is available in China.
Four, isolating switch model-low voltage isolating switch
There are many kinds of disconnectors. Let's learn about the types of low-voltage circuit breakers first. They are the following models: HD, HS series disconnectors and HR series fuse disconnectors. The low-voltage disconnector is used together with the low-voltage circuit breaker. The model of the low-voltage circuit breaker is DW 10 series frame automatic switch, DWX 15. DWX 15C series universal current-limiting circuit breakers, DW 17(ME) series universal circuit breakers, DZ 10 series plastic case automatic switches and DZ 15 series plastics.
Verb (abbreviation of verb) disconnector model-high voltage disconnector
The common model of high voltage disconnector is CR? Disconnector of central circuit breaker (126kV~252kV), DR? Bilateral disconnector (72.5kV~363kV), KR? Two-column horizontal telescopic disconnector (126kV~550kV), PR? Single-column double-arm vertical telescopic disconnector (126kV? Where to? 500kV)、SR？ Horizontal rotating single-side isolating switch (40.5kV), VR? V-type central disconnect switch (126kV), YR? Single column and single arm vertical telescopic disconnector (126kV~550kV).
Disconnector model-scope of application
The disconnector is generally used to isolate the power supply and disconnect the high-voltage maintenance equipment from the live equipment, so that there is an obvious disconnection point between them. In addition, the disconnector cooperates with the circuit breaker to switch according to the needs of the system operation mode, thus changing the wiring mode of the system operation. Disconnectors can also be used to make or break small current circuits. Disconnector plays a great role in the personal safety of users, so it is also a device often used by power plants or power maintenance personnel.
Disconnector model-how to choose
When selecting the disconnector, we should first check whether the product function is safe and the quality is good. It is best to choose a well-known brand on the market, which can protect users. The disconnector is arranged on the main wiring to ensure that the obvious fracture is isolated from the live part when the line and equipment are overhauled. Because the disconnector has no arc extinguishing device, its breaking ability is low. When operating the disconnector, the switching operation sequence must be observed, that is, the disconnector on the bus side should be closed first, then the disconnector on the line side should be closed, and finally the circuit breaker should be closed. In case of power failure, the opposite is true.
Seven points that should be paid attention to when selecting the switch.
1. Look at the appearance.
The style and grade of the switch should be consistent with the overall indoor style. In addition, the white switch is the mainstream, and the overall tone of most interior decoration is light, so it is not appropriate to choose dark switches such as black and brown.
2. feel it.
Most switches with good quality are made of advanced materials such as bullet-proof glue, which have high fireproof performance, moisture-proof performance and impact resistance and smooth surface. When buying, you should consider the feel you feel, initially determine the material of the switch according to the feel, and ask the dealer. Generally speaking, the products with unsmooth surface and thin and crisp feel are unreliable in various performances. The panel of a good switch socket requires no bubbles, scratches and stains. The handle of the switch is light, but not tight. The jack of the socket should be equipped with a protective door, and the plug should be inserted with a certain force, not with one foot.
3. weigh yourself.
When buying switches, you should also weigh the weight of a single switch. Because only the copper sheet inside the switch is thicker, the weight of a single switch will be heavier, and the copper sheet inside is the most critical part of the switch. If it is alloy or thin copper sheet, it will not have the same weight and quality.
4. Choose a brand.
It is best to choose a well-known brand. Because the quality of the switch is related to the normal use of electrical appliances and even the convenience of life. Sometimes the switch sockets produced by many small manufacturers are very unreliable, and it won't take long at all, but frequent replacement is obviously troublesome; However, most well-known brands will make effective promises to consumers, such as "guaranteeing the service life of 12 years" and "continuously switching 10000 times".
5. Select a service.
Go to the store or point of sale designated by the regular manufacturer as far as possible, and keep the shopping voucher to ensure that you can enjoy after-sales service in the future.
6. There is a sign.
Pay attention to the signs on the switch and socket base:? Such as national compulsory product certification (CCC), rated current and voltage values; Product production model, date, etc.
7. the whole set.
Product packaging is complete, with clear manufacturer's address and telephone number, instructions for use and certificate.
The above is what Bian Xiao summarized for you about the switch model and the matters needing attention when purchasing the switch. How's it going? After reading the introduction in the small series above, do you know something about the model of the switch and the matters needing attention in purchasing? What Bian Xiao wants to say here is that there are many models of switches, and we just need to have a general understanding. If you need to buy a switch, you can look at the introduction in the small series above, hoping to bring you some help.