The SEL-751 Feeder Protection Relay is ideal for directional overcurrent, fault location, arc-flash detection, and high-impedance fault detection applications.
SEL-751 relay elements: • Synchronism check device (ANSI device 25 *optional) • Under-voltage elements (ANSI device 27) • Directional power (ANSI device 32) • IEC cable/line/machine thermal overload (ANSI device 49) • Phase instantaneous, definite-time and inverse-time over...
Relay由三个部份组成。反应机构:接受输入信号,并将信号变换成为使Relay动作的物理量。例如,电磁继电器的电磁系统。中间机构:提供控制的标准比较量。例如:电磁继电器的反作用弹簧。执行机构:改变输出回路的电参数。例如:电磁继电器的接触系统(或黎触部分)。所以,继电器又是一种反应与传递信号的电器元件。全新美国sel微机...
These sensors provide to incorporate the functions of an overcurrent protection relay, a ground fault relay, a sensitive earth fault relay and to measure line current, voltage, real and reactive power, power factor, demand watts and VARs, frequency and so on for SCADA substation and distribution...
This course provides complete application training for the SEL-751 Feeder Protection Relay, which is an extremely versatile protective relay used worldwide for industrial and utility feeder protection. You will work with an SEL-751 to gain experience in
SEL-751 Feeder Protection Relay SEL-751微机保护装置, 是工业和公用事业馈线保护的正确解决方案,具有传统/低能量模拟 (LEA) 电流和电压输入支持、灵活的 I/O 选项、易于安装和快速设置。 SEL-751微机保护装置为径向和环形配电电路提供全面保护。它提供弧闪缓解、故障定位、高阻抗故障检测、断线检测、事件分析等功能...
SEL-751 Feeder Protection Relay 我司可以提供美国SEL产品远程或现场安装调试服务! 美国SEL原厂采购,确保正品,拼单物流,价格优势。 SEL-751微机保护装置, 是工业和公用事业馈线保护的正确解决方案,具有传统/低能量模拟 (LEA) 电流和电压输入支持、灵活的 I/O 选项、易于安装和快速设置。