1.1 Application scope
This standard is applicable to the terminal (hereinafter referred to as the terminal) of 50Hz AC high-voltage power equipment such as indoor and outdoor transformers, high-voltage apparatus and bushing, including the following equipment:
a. power transformer (including the terminal of low-voltage side);
b. high-voltage switchgear (including circuit-breaker, disconnecting switch, load switch, metal-enclosed switchgear and combined apparatus);
c. bushing (including wall bushing and bushing for high-voltage apparatus and transformer);
d. current transformer (excluding the secondary terminal);
e. current-limiting reactor;
f. high-voltage fuse for protecting power transformer and power line.
1.2 Application scope for reference
a. The terminal of ground switch, power capacitor, arrester and high-voltage contactor;
b. the terminal of other transformers other than power transformer (such as furnace transformer, rectifier transformer and test transformer), potential transformer and shunt inductor;
c. the grounded terminal and the terminal only used for equipotential bounding;
d. the terminal installed in sealed electrical equipment and cable junction box;
e. the terminal protecting potential transformer and the high voltage fuse of power capacitor;
f. the terminal of DC electrical equipment.
1.3 Specific requirement beyond the scope of this standard shall be settled by negotiation between the user and manufacturer.
1.4 This standard refers to international standard "Dimensional Standardization of Terminals for High-Voltage Switchgear and Controlgear" (IEC 518, 1975).
