DS200DMCBG1AED GE
DS200DMCBG1AED GE
DS200DMCBG1AED GE
决定一个低压系统运行安全性和可靠性的不是某一个元件的性能，而是全部元件的协同配合。
开关电器元件的最佳协同工作的前提是导线和设备保护的选择性工作方式。每个分支、每台电器元件应尽可能受到过载和短路保护，通过通断动作来保护沿着供电方向的其它设备不受到任何影响。
设计一个系统的时候，通常要选择具有分断能力的保护装置，以与安装点的最大可能的短路电流相配。选择性与后备保护VDE和IEC标准都允许通过上级保护电器中具有相当额定分断能力的一台开关电器来实现开关电器的后备保护，这样就能即保护分支回路，又能保护下级的开关电器。
事实上这意味着，在短路电流可能达到例如50kA的电网位置上，如果它是由上级保护电器进行“后备保护”，且开关电器组合装置具有50kA分断能力，也可使用价格便宜的短路分断能力仅20kA的保护电器，同时还可以获得其它的优点（例如节省空间，获得更好的保护）。
按照选择性原则选用西门子的装置可以达到以下的效果：能够最大限度地利用电能，同时通过对线路中故障点有针对性的分断，不仅使系统和设备获得更高的保护，而且不会影响系统中其它负载的正常工作。
more efficient.
Industrial” is a world-leading all-round integrated open control system launched by ABB Group Automation Headquarters.
It integrates the advantages of traditional DCS and PLC in one body and supports a variety of international field bus standards. It has both the complex analog loop regulation capability of DCS
Power-friendly human-machine interface (HMI) and convenient engineering software, and at the same time have high-speed logic and sequence control equivalent to high-end PLC indicators.
control performance. The system can be connected to both conventional I/0 and various field bus devices such as Profibus, FF, CAN, and Modbus. system tool
It has a high degree of flexibility and excellent scalability, whether it is the control of small production units, or the control of ultra-large-scale whole plants – integrated control, even
The Industrial” system can handle the application of field equipment maintenance management and cross-plant production management control with ease.
An important member of the Industrial” family, the AC800F system fully embodies the Industrial” (Industrial Information) system pioneered and led by ABB in
