Analysis of the Concept and Function of Low Voltage Standby Self-protection Device

Introduction: Low-voltage standby self-investment is the abbreviation of low-voltage multi-power automatic switching device. It is mainly used in power distribution systems below 690V to perform rapid and reliable switching between the main and backup power to ensure reliable production and power supply.

Low-voltage self-protection device can be based on the characteristics of commonly used low-voltage circuit breakers, multi-link optimization design, in accordance with the "reliable, easy to use, durable, standard" principle to gradually improve, set measurement / display, digital input / output and Network communication in one. Some of the low-voltage self-propelled protection devices have the power parameter measurement function, through which the standard RS-485 communication interface and twisted pair network are connected to the monitoring system to easily realize the remote management function of the data.

Low-voltage self-protection device can be installed in different locations of the power distribution system. Currently, some low-voltage self-powered products on the market have simple wiring and a variety of logic interlocks. They can work in manual mode, semi-automatic mode, fully automatic mode, and rejection. Loads and other work modes, and has a humanized self-recovery, self-emission does not conceit, remote lock and other functions, to meet the needs of different incoming line occasions.

Low-voltage standby self-investment internal integrated PLC programmable system and AC acquisition system compared with ordinary PLC construction, there are advantages of saving electrical parameter transmitter, saving loss of voltage release and intermediate relay, etc., and prevent logical programming from causing accidents .

Today, low voltage self-propelled protection devices have been widely used in low-voltage power distribution systems such as microgrid systems, hydropower stations, industrial and mining enterprises, high-speed rail disaster prevention equipment, and intelligent buildings. At the Three Gorges Project, Beijing Olympic Stadium, and Jiuquan Satellite Launch Center The large-scale projects such as the Lanzhou-Xinjiang High-speed Railway, Zhengxu Kezhuan, Hefei High Speed ​​Rail, and Shanghai Waibuqiao Terminal have been operating stably for more than three years. They have successfully exported to Mongolia, Laos, India, Ethiopia, and other countries, shouldering the National Exhibition Center, the national high-speed railway, and passenger dedicated lines. The important responsibility of other low-voltage power supply occasions can help customers customize the investment plan or make logical modifications according to the customer's drawings. At present, there are dozens of standard product models, and Chinese and English interfaces are displayed.

Source: Nanjing Guogao Electric Automation Co., Ltd.