1gang 45A Wall Switch

Development trend

The development direction of Switching Power Supply is high frequency, high reliability, low consumption, low noise, anti-interference and modularization. As the key technology of light, small and thin switching power supply is high frequency, foreign manufacturers of switching power supply are committed to synchronously develop new high intelligent components, especially to improve the loss of secondary rectifier devices, and increase scientific and technological innovation in power ferrite (Mn Zn) materials, so as to improve the magnetic properties of high frequency and high flux density (BS), while electricity Miniaturization of containers is also a key technology. The application of SMT technology has made great progress in switching power supply. Components are arranged on both sides of the circuit board to ensure that the switching power supply is light, small and thin.

The high frequency of switching power supply is bound to innovate the traditional PWM switching technology. The soft switching technology of ZVS and ZCS has become the mainstream technology of switching power supply, and greatly improves the working efficiency of switching power supply. For high reliability, the U.S. manufacturers of switching power supply reduce the stress of devices by reducing the operating current and junction temperature, which greatly improves the reliability of products.

Modularity is the general trend of the development of switching power supply. Modular power supply can be used to form a distributed power system, which can be designed as N + 1 redundant power system, and realize the capacity expansion of parallel mode. In order to solve the problem of high noise in switching power supply, if we pursue high frequency alone, the noise will increase. If we adopt the technology of partial resonant conversion circuit, we can realize high frequency in theory and reduce the noise. However, there are still technical problems in the practical application of partial resonant conversion technology, so we still need to carry out a lot of work in this field, so that the technology can be realized. Use chemistry.

How to test the 45A current standard of the switch socket?

2.1 GB1002-2008 "Types, basic parameters and dimensions of single-phase plugs and sockets for household and similar purposes" dao 

2.2 GB1003-2008 "Types, basic parameters and dimensions of three-phase plugs and sockets for household and similar purposes" 

2.3 GB2099.1-2008 "Plugs and sockets for household and similar purposes Part 1: General requirements"

4.4 Breaking capacity 

4.4.1 Testing equipment: test equipment for breaking capacity and normal operation. 

4.4.2 Test method: select an insulated wire with a certain cross product area according to the rated current of the socket; the socket should be tested with a test plug. The pin of the test plug should be made of brass and should be of the largest specified size with a deviation of -0.06mm, and the distance between the plug and the plug is the standard distance, the deviation is +0.05mm, the end of the plug should be rounded; the test voltage is 1.1 times the rated voltage, the test voltage is 1.1 times the rated voltage, the test current It is 1.25 times the rated current, and the test is carried out with alternating current (cPs =0.6±0.05); the plug is inserted and unplugged from the socket 50 times (100 strokes), and the plugging rate is: for electrical ACCESSORIES with a rated current not greater than 16A, each 30 strokes per minute; for other electrical accessories, 15 strokes per minute; the current-carrying time during plug and socket plugging and unplugging is: 1.5+0.5s for electrical accessories not greater than 16A, and 3+0.5s for electrical accessories greater than 16A. 

4.4.3 Judgment of results: During the test, the sample shall not show continuous arc flash. After the test, the sample must not be damaged that affects further use, and the socket of the plug must not be damaged that affects safety performance.