【选型】8A大电流、触点2C的双线圈磁保持功率继电器助力设计配电自动化培训平台故障生成板

时间： 2022-02-11 来源：世强

技术问答

磁保持继电器是控制电路接通和断开的电气元件，只需要脉冲电压触发置位和复位线圈就能控制通断，线圈不需要一直通电。磁保持继电器在控制回路应用较多，但大电流和触点2C的双线圈磁保持功率继电器解决方案很少。

某客户的配电自动化培训平台故障生成板需要一款双线圈磁保持继电器，驱动电压DC5V，触点2C，之前用的电流仅能承受电流2A，经过测试验证需要能承受负载电流5A以上，客户提供继电器电气原理图如下：

根据客户的需求推荐FUJITSU（富士通）FTR-F1LDCA005-R双线圈磁保持继电器，其性能如下：

1、线圈驱动电压范围DC5V~DC24V，触点2C，触点负载8A@250VAC/DC24V；

2、外形长29.0*宽12.8*高16.5mm，重量13g；

3、触点与线圈间介质耐压5000VAC；

4、工作温度-40℃~+85℃。

继电器外形图和电路图如下：

电路图中，SP:置位线圈，1接电源+，10接电源-；S：复位线圈，8接电源+，9接电源-。工作原理：线圈在置位后，常闭触点变常开，常开触点变常闭；线圈在复位后，触点状态恢复如上图。

FUJITSU（富士通）FTR-F1LDCA005-R双线圈磁保持继电器亮点总结如下：

1、宽电压输入，大电流，2C触点，其它品牌一般是1A/1C/2A，能满足电路多场景切换要求；

2、体积小，节省安装空间，重量轻；

3、触点与线圈间耐压高达5000VAC，绝缘强度高；

4、宽温工作。

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