本标准涵盖了某些电气、尺寸和机械特性，并考虑了60 Hz、双绕组、液浸式变压器的某些安全特性，额定值如下，用于降压目的: 1） 833/958至8333/10417 kVA，单相；750/862至10000/12500 kVA，三相；高压，2400至138000伏；低压，480至36230伏；无负载分接开关。 2） 12000/16000/20000至60000/80000/100000 kVA，三相；高压，23000至230000伏； 低压，4800至36230伏；无负载分接开关。 3） 3750/4687至10000/12500 kVA，三相；高压，6900至138000伏？，低电压，2400至36230伏；随着负载抽头的改变。 4） 12000/16000/20000至60000/80000/100000 kVA，三相；高压，23000至230000伏；低压，4800至36230伏；有载调压开关 本标准不适用于干式、调节式、垫装式、二次网络、熔炉、整流器或矿井变压器。

This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of 60-Hz, two-winding, liquid-immersed transformers rated as follows, and used for step-down purposes: 1) 833/958 through 8333/10 417 kVA, single-phase; 750/862 through 10 000/12 500 kVA, three-phase; high voltage, 2400 through 138 000 volts; low-voltage, 480 through 36 230 volts; without load tap changing. 2) 12 000/16 000/20 000 through 60 000/80 000/ 100 000 kVA, three-phase; high voltage, 23 000 through 230 000 volts; low voltage, 4800 through 36 230 volts; without load tap changing. 3) 3750/4687 through 10 000/12 500 kVA, three-phase; high voltage, 6900 through 138 000 volts", low voltage, 2400 through 36 230 volts; with load tap changing. 4) 12 000/16 000/20 000 through 60 000/80 000/100 000 kVA, three-phase; high voltage, 23 000 through 230 000 volts; low voltage, 4800 through 36 230 volts; with load tap changing It is not intended that this standard shall apply to dry-type, regulating, pad-mounted, secondary-network, furnace, rectifier, or mine transformers.