The DC screen PLC monitoring system is a high-end monitoring in the DC screen monitoring industry. The so-called high-end monitoring, its four essential conditions are: long-term stable and reliable, multi-functional integration, brand effect, moderate price. In China, DC screen is widely used in power distribution places in various industries. It provides power for controlling load and power load as well as DC accident lighting load. It is the basis for the control and protection of modern power systems; and with the rapid development of China's smart grid Construction requires high reliability of power automation equipment, and thus it is available that the DC screen that is the basis of the power system must be reliable first. First of all, we have to analyze several major components of the DC screen. 1. AC power distribution unit: The simplest is the interlocking of the AC contactor. After the AC power is cut in, it enters the power module via the AC switch or fuse, and gradually develops. The contactor + AC contact interlock is controlled by the DC screen monitoring system. This has the advantage of detecting the AC voltage and controlling the switching of the AC power. Up to now, there are also more advanced dual power switching devices, such as Schneider's Wangao dual power switching device. This unit has a very low failure rate. 2. Charging unit: Early stage is six-way or twelve-way phase-controlled rectification. Due to the large DC ripple of this rectification mode, it has an impact on the battery pack life and part of the DC load, and is replaced by the developed high-frequency charging module. Nowadays, the high-frequency rectification technology is becoming more and more mature, so the reliability of the charging unit is also getting higher and higher. 3, DC power distribution unit: consists of DC switch, interlock device, etc. This unit is too simple, not much to say here. 4. DC screen monitoring unit: This unit shoulders the task of controlling and monitoring the DC screen from AC input to DC output. It is the soul of DC power system. He controls the whole process of charging the battery pack by the rectifier module; monitors the AC power supply voltage, DC voltage and current, battery pack charge and discharge voltage and current, DC ground insulation and various important positions. The DC system currently used is the N+1 redundancy mode. When the monitoring system fails, the current limit value of the rectifier module is completely released, and the overcharge phenomenon is likely to occur. The most important is the DC bus insulation detection. When the DC system is used. When a certain pole is grounded and the insulation detection unit of the monitoring system fails, a big hidden danger is buried (because during the long-term operation of the DC screen, the user rarely tests various functions of the monitoring system to monitor the system. The alarm is correct. In addition, the production cost of the DC screen monitoring system is low. Many small factories use the so-called mature technology in the market to produce blindly. The electronic originals are not purchased properly. Many electronic originals are not sold in a single sale, but the sales of small factories are limited. Control costs and inventory, it is very likely to use the disassembled parts), the finished product testing equipment is not perfect, and ultimately the unqualified products are used in the factory, and various faults and false alarms occur, causing losses to the user's property. Concrete Pump Rubber Parts, all used on the natural rubber material, about these rubber parts, we also have polyurethane material parts, but the rubber parts service life is more longer and quality is better, usually, we have Concrete Pump Rubber Piston, Concrete Pump Rubber Seal and rubber gasket and so on ! Concrete Pump Rubber Parts Concrete Pump Rubber Parts,Concrete Pump Parts,Concrete Pump Accessories Hebei Shengdebaolong International Trading Co.,ltd , http://www.sdblpumpparts.com
DC screen PLC monitoring system application analysis