1756-L73S
1756-L73S
1756-L73S
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〖厦门光沃自动化设备有限公司 竭诚为您服务〗
〖联系人:欧工 〗
〖手机:18030229053(微信同号) 〗
〖QQ: 2479261344 〗
〖传真:0592-5709825
【价格】如此低价,仅此一家
【货期】大量现货,下单后即可发货
【质量】全新原装,进口***
【保障】产品经过专业检测,质保一年,15天包退换
【品牌】Allen-Bradley罗克韦尔、ABB、本特利Bently 3500系统卡件、GE、艾默生西屋等模块卡件
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旁路柜主要配置:三个真空接触器(KM1、KM2、KM3)和两个隔离开关QS1、QS2(在变频器退出而电机运行于旁路时,能安全地进行变频器的故障处理或维护工作)。KM2与KM3实现电气互锁,当KM1、KM2闭合,KM3断开时,电机变频运行;当KM1、KM2断开,KM3闭合时,电机工频运行。另外,KM1闭合时,QS1操作手柄被锁死,不能操作;KM2闭合时,QS2操作手柄被锁死,不能操作。
电机工频运行时,若需对变频器进行故障处理或维护,切记在KM1、KM2分闸状态下,将隔离刀闸QS1和QS2断开。
1)合闸闭锁:将变频器“合闸允许”信号串联于KM1、KM2合闸回路。在变频器故障或不就绪时,真空接触器KM1、KM2合闸不允许;在KM1、KM2合闸状态下,若变频器出现故障,则“合闸允许”断开,KM1、KM2跳闸,分断变频器高压输入电源。
2)旁路投入:将变频器“旁路自动投入”信号并联于KM3合闸回路。变频运行状态下,若变频器出现故障且自动投入允许,系统将首先分断变频器高压输入、输出开关KM1和KM2,经过一定延时后,“旁路自动投入”信号闭合,即工频旁路开关KM3合闸,电机投入电网工频运行。
3)保护:保持原有对电机的保护及其整定值不变。
2.3现场施工方案
将现场风机原有的液耦调速更改为电机直驱。即拆除液偶,将一次风机、二次风电机基础前移至液偶位置,在液偶基础上加固以固定电机,拆除液偶外置工作油泵、润滑油泵。每台电机新增加稀油站。
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