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目前我国有关磁力起动器中漏电闭锁装置的研制与生产尚处于开始阶段,作为正规产品试制与已进行工业性运行的有千伏级磁力起动器QCKB30系列的LB—1型漏电闭锁插件,其电气原理如图1所示。该装置的特点是漏电闭锁检测电压为直流100V,绝缘电阻检测采用三相伪中性点方式,漏电检测电路通过延时闭合接点投入运行,可称为高压、三相、延时式漏电闭锁装置。通过理论分析与实验研究,作者认为,在
At present, China’s development and production of leakage lock device in magnetic starter is still in its infancy. As a regular product trial and industrial operation, LB-1 type leakage lockout plug-in with kilovolt-class magnetic starter QCKB30 series has its electrical The principle is shown in Figure 1. The device is characterized by leakage latch detection voltage of 100V DC, the insulation resistance detection using three-phase pseudo-neutral point way, leakage detection circuit through the closing time delay contact put into operation, can be called high voltage, three-phase, delay leakage lock device . Through theoretical analysis and experimental research, the author believes that