DL/T 555-2004 in English

本标准规定了额定电压72.5kV及以上，频率为50Hz的户内和户外安装的气体绝缘金属封闭开关设备(以下简称GIS)的现场耐压及绝缘试验要求及方法。72.5kV以下的可参照本标准。
本标准适用于全部或部分采用气体作为绝缘介质的气体绝缘金属封闭开关设备。GIS新安装部分、扩建部分及解体检修的部分均应按本标准试验。
单独使用的SF6罐式断路器可参照本标准执行。

Scope

This standard specifies the on-site voltage withstand and insulation test requirements and methods for gas-insulated metal-enclosed switchgear (hereinafter referred to as GIS) installed indoors and outdoors with a rated voltage of 72.5kV and above and a frequency of 50Hz. Below 72.5kV, please refer to this standard. This standard applies to gas-insulated metal-enclosed switchgear that uses gas as the insulating medium in whole or in part. Newly installed parts, expanded parts and disassembled parts for maintenance of GIS shall be tested in accordance with this standard. SFe tank circuit breakers used alone can refer to this standard.