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<p>Main electrical parameters of 252kV GIS:</p> <p>&nbsp;</p> <table> <tbody> <tr class="firstRow"> <td colspan="2" style="vertical-align:center" width="60%"> <p style="text-align:center"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Project</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="30%"> <p style="text-align:center"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Parameter</span></span></span></span></span></p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Rated voltage</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">252 kV</p> </td> </tr> <tr> <td rowspan="2" style="vertical-align:center" width="179"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Rated insulation level</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="242"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">1min power frequency withstand voltage (break/ground)</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">（460+145）kV/460kV</p> </td> </tr> <tr> <td style="vertical-align:center" width="242"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Lightning impulse withstand voltage (break/ground)</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">（1050+200）kV/1050 kV</p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Rated frequency</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">50 Hz</p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Rated current</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">3150、4000 A</p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Rated short-circuit breaking current</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">50 kA</p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Rated peak withstand current</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">125 kA</p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Short time withstand current (effective value)</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">50 kA/3s</p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center; word-break:break-all" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">SF6 gas leakage rate</span></span></span></span></span></p> </td> <td style="vertical-align:center; word-break:break-all" width="251"> <p align="center">&lt;0.3%/year</p> </td> </tr> <tr> <td rowspan="2" style="vertical-align:center; word-break:break-all" width="179"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">SF6 gas humidity</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="242"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Electrolytic decomposition products (handover acceptance value/long-term operation allowable value)</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">&le;150/300uL/L</p> </td> </tr> <tr> <td style="vertical-align:center" width="242"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">No electrolytic decomposition products (handover acceptance value/long-term operation allowable value)</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">&le;250/500uL/L</p> </td> </tr> <tr> <td style="vertical-align:center" width="179"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Partial discharge</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="242"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Each interval/individual insulation component</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p align="center">&le;5/3Pc</p> </td> </tr> <tr> <td rowspan="2" style="vertical-align:center" width="179"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Structural layout</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="242"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Circuit breaker</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p style="text-align:center"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Three phase distribution box</span></span></span></span></span></p> </td> </tr> <tr> <td style="vertical-align:center" width="242"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Main busbar</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p style="text-align:center"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Three phase common box</span></span></span></span></span></p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Circuit breaker operating mechanism</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p style="text-align:center"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Hydraulic and spring mechanism</span></span></span></span></span></p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Circuit breaker operation mode</span></span></span></span></span></p> </td> <td style="vertical-align:center" width="251"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Split phase operation, three-phase mechanical linkage</span></span></span></span></span></p> </td> </tr> <tr> <td colspan="2" style="vertical-align:center" width="421"> <p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋體"><span style="font-family:Calibri">Spacing size</span></span></span></span></span></p> </td> <td style="vertical-align:center; word-break:break-all" width="251"> <p align="center">1.8-2.2m</p> </td> </tr> </tbody> </table>