JB/T 5777.2-2002 (English Version) PDF

Scope: This standard specifies the technical requirements, test methods and inspection rules for control and relay protection panels (cabinets, tables). This standard applies to control panels (cabinets, stations) and protection panels (cabinets, stations) used in secondary circuits of power systems. It only includes protection of transmission lines with voltage levels below 110kV and relay protection of water and thermal power plants with a single unit capacity of 25MW and below. ) [hereinafter referred to as screens (cabinets, tables)] and other electrical complete sets, as the main basis for product design and manufacturing quality assessment. This standard does not apply to transmission line protection screens, main equipment protection screens, DC screens (cabinets) and nickel-cadmium battery DC power supply screens (cabinets) with voltage levels of 110kV and above. Such products are regulated by other standards. This standard does not apply to low-voltage complete sets of switchgear and other products.

JB/T 5777.2-2002 history

2002 JB/T 5777.2-2002 General specification for control and protection panel (cabinet、desk) of secondary circuit of power system
0000 JB/T 5777.2-1991