1.Development and Application of Digital Substations	download
2.HGIS Will Gradually Become the Main High Voltage Equipment for the Substations in China	download
3.Electronic PTs and CTs	download
4.HGIS Promotes the Technologies Concerning Combined Electric Equipment	download
5.Necessity of the Existence of the Internal Earthing Switch ES1 of HGIS	download
6.Electronic Photo-Electric Instrument Transformers	download
7.Digital Substations	download