Start with the charging/communication interface to make the charging pile safer and more reliable!
Abstract: To ensure the safety and reliability of the charging pile, it is necessary to over-current and over-voltage protection of its charging/communication port.
This article gives you a high-breaking current, high I2T fuse, so that the charging pile is away from bursting and false triggering accidents.
The function of the charging pile is similar to that of the fueling station inside the gas station. It can be fixed on the ground or wall, installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and in residential parking lots or charging stations. It can be based on different voltages. The level is charged for various types of electric vehicles. The input of the charging post is directly connected to the AC grid. The output has AC and DC points, and both are equipped with charging plugs to charge the electric car.
Figure 1: AC charging pile topology
The design of the charging post must take into account the safety and reliability, so the overcurrent and overvoltage protection must be used on the input, output and communication interfaces with safe and reliable protection devices. Here we recommend a fuse from Shiqiang, which is the industry leader Littelfuse's large voltage high current fuse 0504030.MXEP. This model is an ideal circuit protection solution for the AC input of charging piles. It has been widely used in the field of charging piles.
Shiqiang 0504030.MXEP is a 420VDC, 500VAC ceramic fuse with a rated current of 30A. It has a large rated breaking current and is available in a compact 6.3 x 32mm package. It combines high current, high reliability and small size. Its rated breaking current is up to 400A@420VDC, 1500A@250VAC, 200A@500VAC. The higher breaking current means that the fuse is less prone to burst under extreme conditions, so it is safer to use. Not only that, the I2T value of this model is as high as 2600A2s, and the higher I2T value means that the fuse is less prone to false triggering when the system is normal, so it is more reliable.
WDM (Wavelength Division Multiplexing) combines two or more optical carrier signals of different wavelengths (carrying various information) at the transmitting end through a multiplexer (also known as a multiplexer), and The technology of transmitting in the same optical fiber coupled to the optical line; at the receiving end, the optical carrier of various wavelengths is separated by a demultiplexer (also called a demultiplexer or demultiplexer), and then the optical carrier is The receiver performs further processing to restore the original signal. This technology of simultaneously transmitting two or more optical signals of different wavelengths in the same optical fiber is called wavelength division multiplexing.
Wavelength division multiplexing is a technology that uses multiple lasers to simultaneously send multiple lasers of different wavelengths on a single fiber. Each signal is transmitted in its unique color band after being modulated by data (text, voice, video, etc.). WDM can greatly increase the capacity of the existing fiber optic infrastructure of telephone companies and other operators. Manufacturers have introduced WDM systems, also called DWDM (Dense Wavelength Division Multiplexing) systems. DWDM can support the simultaneous transmission of more than 150 light waves of different wavelengths, and each light wave can reach a data transmission rate of up to 10Gb/s. This system can provide a data transmission rate of more than 1Tb/s on an optical cable that is thinner than a hair.
Optical communication is a way in which light carries signals for transmission. In the field of optical communications, people are accustomed to naming them by wavelength instead of frequency. Therefore, the so-called Wavelength Division Multiplexing (WDM) is essentially frequency division multiplexing. WDM is a system that carries multiple wavelengths (channels) on one optical fiber, and converts one optical fiber into multiple "virtual" fibers. Of course, each virtual fiber works independently on a different wavelength, which greatly improves the transmission capacity of the optical fiber. . Because of the economy and effectiveness of the WDM system technology, it has become the main means of expanding the capacity of the current optical fiber communication network. As a system concept, wavelength division multiplexing technology usually has three multiplexing methods, namely, wavelength division multiplexing with wavelengths of 1 310 nm and 1 550 nm, sparse wavelength division multiplexing (CWDM, Coarse Wavelength Division Multiplexing) and dense wave Division Multiplexing (DWDM, Dense Wavelength Division Multiplexing).
CWDM, DWDM, FWDM, LAN WDM, FBT WDM, AAWG WDM, Other WDM Related Equipment
Shenzhen GL-COM Technology CO.,LTD. , https://www.szglcom.com