GFD563A101 3BHE046836R0101 让空气通过通道来冷却电力部件

ABB GFD563A101 3BHE046836R0101 确保生产的每一个驱动器都经过内部和外部认证的各种测试程序的彻底测试。常规测试程序非常严格，始终领先一步，以确保可靠运行和长寿命。新设计的冷却通道可以让空气通过通道来冷却电力部件。它还将空气中的灰尘与电源和控制单元隔离开来。

这样可以保护印刷电路板（PCB）上的组件，从而降低故障率并延长使用寿命。通过使用新的涂层技术，印刷电路板上的更大面积被覆盖，保护驱动器免受粉尘和油的影响，使驱动器即使在恶劣环境中也能可靠工作。

按钮的执行器是您按下以激活开关的部分。这些致动器有几种不同的类型，如图1-6所示，每种都有特定的用途。图1-6中左侧的开关有一个带防护罩的执行机构。在这种情况下，按钮在套筒内凹进1/4“-1/2”，只能由比套筒小的物体（如手指）按下。

它提供了防止按钮被手掌或其他物体意外按下的保护，因此用于按下开关导致潜在危险发生的情况。防护按钮用于启动、运行、循环、点动或复位操作等应用。例如，计算机上的RESET按钮可能是一个保护按钮。图1-6中心所示的开关有一个致动器，该致动器与套筒对齐，使其与套筒平齐。它被称为冲洗按钮。

它提供了与防护按钮类似的防止意外启动的保护；但是，由于它不是嵌入式的，所以保护级别不到防护按钮的程度。这种类型的开关致动器在需要背光致动器（称为发光按钮）的应用中工作得更好。

introduction

Distributed Control System (DCS) is a comprehensive product of computer, automatic control technology, and network communication technology. It is based on the design concept of decentralized control, decentralized danger, centralized operation and management, and adopts a multi-level hierarchical, cooperative and autonomous structural form, adapting to the requirements of modern production and enterprise management. Due to the integration of the latest fieldbus, embedded software, advanced control, reporting technology, CRT, and network technology, DCS is able to comprehensively control the entire production process from a large equipment (boiler) to a modern chemical plant, and provide a basic platform for the full process information management of the factory.

With the continuous development of productivity in China and the continuous improvement of scientific and technological level in production process automation, DCS control systems are commonly used in newly built thermal power plants in China. Previously, conventional control thermal power plants have also undergone DCS transformation. With the continuous development of DCS control systems and the continuous improvement of performance, prices are decreasing year by year, and the application range of DCS control systems will become increasingly broad. DCS has gradually begun to be widely used in small power plants. In China, small thermal power plants are basically heating units, mainly used for self owned power plants and urban heating of large enterprises in industries such as metallurgy, petrochemical, chemical, textile, etc. Most of them belong to power plants outside the power system. The typical main equipment selection is mostly a circulating fluidized bed boiler equipped with an extraction steam turbine generator unit, usually consisting of two boilers and one unit or three boilers and two units, with the thermal system being the main pipe. The thermal power plant of Baoding Petrochemical Plant is a typical enterprise's self-provided cogeneration unit. The application and improvement of its DCS system can provide some ideas and references for many small power enterprises in China.