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所在平台: Udemy |
课程主页: https://www.udemy.com/course/electrical-panel-designing-and-maintenance-part-2/
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《电气面板设计与维护 - 第二部分》课程概述： 本课程聚焦于自动转换（AMF）控制系统在双电源面板中的应用，尤其适用于具有两个进线段或带有母线隔离开关的双进线段的面板。AMF系统能够确保在主电源失效时，为MSB（主配电板）提供第二电源。 课程通过单线图详细解析了电源转换的控制电路逻辑。主电源通过MPFR（主电源分断器）接入，发电机电源则通过GPFR（发电机电源分断器）接入。电路中设置了关键的互锁机制：继电器K1的闭合需要MPFR激活；继电器K2的闭合则取决于GPFR未激活。 当MPFR检测到主电源故障时，主电源侧控制断电（继电器K1断开），主断路器随即打开，然后通过K4（关断定时器）发出指令启动发电机。 电源转换的工作原理与双进线段面板类似，主要区别在于母线隔离开关的操作。母线隔离开关的闭合指令与主进线断路器联动：当主断路器闭合时，母线隔离开关接收闭合信号；当主断路器断开时，母线隔离开关也随之断开。 本课程介绍的面板分为两个区域：非重要负荷区域和重要负荷区域。这两个区域通过内部的母线隔离开关连接。重要负荷区域用于供应需要持续供电的区域，而非重要负荷区域则供电给其他区域。
The AMF control system is used to provide a second power supply to panels with two incoming sections or two incoming sections with a bus coupler.The AMF system controls the power supply of the MSB when the main power source fails.The logic of the control circuit used to transfer power is described here with a single line drawing.The main power is connected through MPFR and generator power connected through GPFR.Other interlocks are also provided in between the NC of K1 and K2. That means to close relay K1, MPFR need to activate. The relay K2 will not close unless the GPFR is not active.As soon as the MPFR realizes the failure of the main power source, the power supply to the primary side control stops (relay K1 opens).Followed by the main breaker opening and the off-timer (K4) sending a signal to start the generator.The working principle of the power transfer is the same as that of the panel with two incoming sides.The only difference is the operation of the bus coupler, which is controlled in conjunction with the main incoming breaker.When the main breaker closes, the bus coupler will receive the closing signal, and if the main breaker is open, the bus coupler will also open.This panel is divided into two sections, such as non-essential and essential. The two sections are joined together with a bus coupler inside the panel.The essential side supplies power to the areas where continuous power is required, and the other section supplies power to the non-essential areas.The two sections are joined together with a bus coupler inside the panel.
