高压变电所内屏蔽电缆屏蔽层的正确接地，对降低外部电磁场对微机型二次设备的干扰水平，起着重要作用。
The proper earthing of the shielded layer of cable in HV substation plays an important part in reducing electromagnetic interference to the microcomputer-based secondary facilities.
继电保护装置应用于主要电气设备和二次接线回路中； 并熟练掌握了变电所内主要电气设备和二次回路的工作原理。
Made the voltage changer and outfeeder's protection setting calculation, mastered the principles of the main apparatus and secondary circuit.
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