本指南中提出的建议适用于二次电压为1000V及以上、额定值为501kVA及以上的液浸式电力变压器的检查、安装和维护。本指南涵盖了电力变压器的整个范围，包括超高压（EHV）变压器。本指南不包括特殊变压器，如熔炉变压器、整流变压器等。根据不同MVA额定值、电压额定值和液体绝缘类型的要求进行区分。制造厂？对于变压器的检查、安装和维护，尤其是在设备处于保修期内时，应将s说明书作为主要参考。本指南应结合使用，以补充制造商A？s的使用手册，或在不可用时作为替代品。 第4条包含与额定值低于10 MVA、高压低于69 kV的变压器一起使用的信息。 第5条适用于额定值为10 MVA及以上、高压为69 kV及以上的变压器，包括超高压变压器。对于高压小于69 kV且大于或等于10 MVA的变压器，用户应遵守第5条。

The recommendations presented in this guide apply to the inspection, installation, and maintenance of liquid-immersed power transformers rated 501 kVA and above with secondary voltages of 1000 V and above. This guide covers the entire range of power transformers, including extra high-voltage (EHV) transformers. This guide does not cover special transformers such as furnace transformers, rectifier transformers, etc. Distinctions are made as required for various MVA ratings, voltage ratings, and types of liquid insulation. The manufacturer's instruction manual should be the primary reference for transformer inspection, installation, and maintenance, especially while the equipment is under warranty. This guide should be used in conjunction to supplement the manufacturer's instruction manual, or as a substitute when it is not available. Clause 4 contains information for use with transformers rated below 10 MVA with high voltages less than 69 kV. Clause 5 applies to transformers rated 10 MVA and above with high voltages of 69 kV and above, including EHV transformers. For transformers with high voltages that are less than 69 kV and larger than or equal to 10 MVA, users should follow Clause 5.