描述
469-P5-LO-A20-E 继电器的相电流互感器
继电器的相电流互感器、接地电流互感器和电机满载电流应该设置成什么样?对于GE 469-P5-LO-A20继电器,相位电流互感器必须在一次电流互感器50%至100%的满载电流下选择,但满载电流为347.5A时,可以选择350:5或400:5的电流互感器,400:5是所选尺寸的标准。高阻接地系统对接地检测很敏感,并可用于50:0.025 CT。相电流互感器和接地电流互感器的其他数据表规定了将电机满载电流设置为348A。GE电机管理继电器的过载启动和过载曲线设置是什么?过载启动设置应在1.25倍满载电流的最高工作系数上,以便电机工作系数为1.15,如果工作系数未知,则应自动设置为1.0。该电机配有电阻温度检测器(RTD ),继电器使用该检测器来保护过载传感器。为了使过载曲线不损害继电器的保护,过载曲线应设置在标准过载曲线,并具有最长的处理时间,它将刚好低于冷热极限。过载曲线7最适合这种继电器。
469-P5-LO-A20-E 继电器的相电流互感器
What should be the phase current transformer, ground current transformer and motor full load current of the relay? For the GE 469-P5-LO-A20 relay, the phase current transformer must be selected at 50% to 100% of the full load current of the primary current transformer, but for A full load current of 347.5A, a 350:5 or 400:5 current transformer can be selected, and 400:5 is the standard for the selected size. The high resistance grounding system is sensitive to ground detection and can be used for 50:0.025 CT. Other data sheets for the phase current transformer and the ground current transformer specify that the motor full load current is set to 348A. What are the overload start and overload curve Settings for GE motor management relays? The overload starting setting should be at the maximum operating factor of 1.25 times the full load current, so that the motor operating factor is 1.15, and if the operating factor is unknown, it should be automatically set to 1.0. The motor is equipped with a resistance temperature detector (RTD), which is used by the relay to protect the overload sensor. In order that the overload curve does not compromise the protection of the relay, the overload curve should be set at the standard overload curve and have the longest processing time, which will be just below the hot and cold limits. Overload curve 7 works best for this relay.
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