韩国龙声YSNPBL3-T11AG绿色指示灯
龙声电机株式会社（yongsung electric co.,ltd）成立于1980年，以高品质和正道经营来被公认为核能产品领域的企业，以***的技术和始终如一的R&D来成为世界的龙声。转换开关又称组合开关，与刀开关的操作不同，它是左右旋转的平面操作。转换开关具有多触点、多位置、体积小、性能可靠、操作方便、安装灵活等优点，多用于机床电气控制线路中电源的引入开关，起着隔离电源作用，还可作为直接控制小容量异步电动机不频繁起动和停止的控制开关。转换开关同样也有单极、双极和三极。转换开关的接触系统是由数个装嵌在绝缘壳体内的静触头座和可动支架中的动触头构成。动触头是双断点对接式的触桥，在附有手柄的转轴上，随转轴旋至不同位置使电路接通或断开。***机构采用滚轮卡棘轮结构，配置不同的限位件，可获得不同档位的开关。转换开关由多层绝缘壳体组装而成，可立体布置，减小了安装面积，结构简单、紧凑，操作安全可靠。转换开关可以按线路的要求组成不同接法的开关，以适应不同电路的要求。在控制和测量系统中，采用转换开关可进行电路的转换。例如电工设备供电电源的倒换，电动机的正反转倒换，测量回路中电压、电流的换相等等。用转换开关代替刀开关使用，不仅可使控制回路或测量回路简化，并能避免操作上的差错，还能够减少使用元件的数量。转换开关是刀开关的一种发展，其区别是刀开关操作时上下平面动作,转换开关则是左右旋转平面动作,并且可制成多触头、多档位的开关。
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