Air switches are often used in daily work or life, but many people do not fully understand it. What is the air switch? How to install the air switch? How to choose the air switch model ? When asked about these, netizens will be at a loss. However, the wrong installation of the air switch or the wrong connection of the circuit may cause a short circuit in the circuit and cause a fire and other safety accidents. It can be seen that understanding the installation of the air switch and the selection of the air switch model are very important for the safety of the home.
Air switch model 1. What is an air switch?
Compared with the traditional power switch, the air switch is a controller that uses a low-voltage distribution network and an electric drive system. The control and protection functions are more prominent during use. In the case of no complete contact and disconnection of the circuit, the same The section of electrical equipment or the load plays a protective role. In addition, it is more suitable to use on the ground starting motor. The working principle of the air switch: when the working current exceeds the rated current, short circuit, loss of pressure, etc., the circuit is automatically cut off.
The air switch is divided into several P, some people say how many poles.
From 1P to 4P (1P thickness is 18MM, 2P is 36MM ...), 1P is 1 line in and out, 2P is 2 lines in and out, and so on. At home, 1P or 2P is generally used. The difference between 1P and 2P is that 1P can only disconnect 1 live wire, and 2P can disconnect both live and zero wires at the same time, which is 1P + N, so 2P is relatively better. If the rated voltage of the equipment you load is 220V, you can use the air switch of 1P or 2P. If it is 380V, you need 3P or 4P. If you do n’t need zero for the load equipment, just choose 3P, such as motor, Fans, pumps, etc. only use 3P air switches; for 380V water heaters, water heaters and other equipment, 4P is required, and an air switch with leakage protection function is also required. This is necessary to prevent leakage accidents and ensure personal safety. To be used.
Air switch model two, the choice of household air switch
The air switch is used as a main power protection switch or a branch line protection switch in household power supply. When a short circuit or overload occurs on a residential circuit or a household appliance, it can automatically trip and cut off the power supply, thereby effectively protecting these devices from damage or preventing accidents from expanding.
Households generally use two-pole (2P) circuit breakers for total power protection and single-pole (1P) branch protection. If the rated current of the circuit breaker is too small, the circuit breaker is likely to trip frequently, causing unnecessary power outages. If the selection is too large, the expected protection effect will not be achieved. Therefore, for home-built circuit breakers, the correct selection of the rated capacity current is very large important. The general small circuit breaker specifications are mainly divided into 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, etc. by rated current.
Air switch model three, household air switch specifications
At present, the family uses DZ series air switch, the common air switch specifications are as follows:
C16, C25, C32, C40, C60, C80, C100, C120 and other specifications, where C represents the tripping current, that is, the tripping current, for example, C32 means that the tripping current is 32 amperes, generally install 6500W water heater to use C32, install 7500W, 8500W The water heater should use the C40 air switch.
Air switch model 4. Application of air switch model
1. DZ5 series plastic shell type air switch is suitable for the circuit of AC 50HZ, 380V, rated current from 0.15A to 50A.
2. DZ10 series plastic shell air switch is suitable for distribution lines of AC 50HZ, 380V or DC 220V and below, used to distribute electrical energy and protect overload and undervoltage and short circuit of power lines and power equipment, as well as infrequent under normal work It is used to break and connect the line.
3. DZ12 series plastic shell air switch has small size, novel structure, excellent and reliable performance. It is mainly installed in the lighting distribution box and is used for the exchange of 50HZ single-phase 230V in hotels, apartments, high-rise buildings, squares, airports, railway stations and industrial and commercial enterprises.
4. DZ15 series plastic shell type air switch is suitable for on-off operation in the circuit of AC 50HZ, rated voltage 380V, rated current 63A.
5. DZ20 series plastic shell air switch is suitable for AC 50HZ, rated insulation voltage 660V, rated voltage 380V and below, and its rated current up to 1250A.
6. The four-stage air switch is mainly used in AC 50HZ, rated voltage 400V and below, rated current 100 to 630A three-phase five-wire system, it can ensure that the user and the power supply are completely disconnected, to ensure safety, thereby solving any other air The disadvantage that the switch cannot overcome the neutral current is not zero.
7. As long as the DZ47 series of small air switches are suitable for AC 50HZ / 60HZ, the rated operating voltage is 240V / 415V and below, and the rated current is 60A, this air switch is mainly used for overloading of electrical lines and equipment in modern buildings, Short circuit protection.
8. SCML series air switch is suitable for the infrequent start of the infrequent conversion box motor in the circuit of AC 50HZ, 60HZ, 500V and below.
9. DW10 series universal air switch is suitable for AC 50HZ, rated voltage to 440V electrical circuit, used for overload, short circuit, voltage loss protection and infrequent conversion under normal conditions.
10. DW15 series universal air switch is suitable for the distribution network of AC 50HZ, rated voltage to 440V, rated working voltage to 1140V, 80V, used to distribute electrical energy and overload, undervoltage, short circuit protection of power supply lines and power supply equipment use.
11. H series plastic shell type air switch is suitable for rated current 600A and below, AC 50HZ, rated operating voltage 690V and below, DC 230V and below is generally used as accompany electrophoresis, rated current 225A and below air switch, can be used as line and not Used for frequent switching and infrequent starting of the motor.
12. The AC30 series modularized socket is a supporting electrical component of the modularized terminal combined electrical installation installed in the user, and can also be installed in other complete electrical boxes to plug the electrical equipment.
What are the above air switch models are briefly introduced here for everyone, I hope to help you, if there is anything you do not understand, then pay attention to our website.
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