Cable sheath grounding circulation simulation device and transformation method of conversion boxes

The invention discloses a cable sheath grounding circulation simulation device, which comprises a three-phase cable system, a three-phase power supply, three sets of three-phase isolation transformers and two sets of transformed conversion boxes. By transforming the conversion boxes, the transformers can be parallelly accessed, and then the real cable sheath grounding circulation phenomenon is simulated; and the transformed conversion boxes comprise inner core electrodes, outer core electrodes, grounding coaxial cables, bridging coaxial cables and three-core sockets. The grounding circulation phenomenon of the normally operating cables can be highly restored, the training teaching effect is advantageously improved, and the device is low in cost and suitable for training teaching. 本发明公开了一种电缆护层接地环流模拟装置，包含：三相电缆系统、三相电源、三套三相隔离变压器和两套改造版换位箱；通过对换位箱进行改造使变压器可以并联接入，进而模拟真实的电缆护层接地环流现象。改造版换位箱包含内芯电极、外芯电极、接地同轴电缆、跨接同轴电缆、三芯插座。本发明可以高度还原正常运行电缆的接地环流现象，有利于提高培训教学效果，且本发明装置成本低，适宜培训教学使用。