Executive standard:

GB1984-2003 AC High Voltage Circuit Breakers
GB311.1-1997 Insulation Coordination for High Voltage Transmission and Transformation Equipment
GB3309-1989 Mechanical Test of High Voltage Switchgear at Normal Temperature
GB1958-2004 AC High Voltage Disconnectors and Earthing Switches
GB4208-1993 IP Code for Degrees of Protection Provided by Enclosures
GB/T7354-2003 Partial Discharge Measurement
GB/T11022-1999 Common technical conditions for high-voltage switchgear and controlgear standards
GB3906-2006 3-40.5kV AC metal-enclosed switchgear and controlgear
GB765-1990 Heating of AC High Voltage Apparatus in Long-term Operation