本指南的范围包括电力变压器保护的一般原理、实际应用和经济考虑。重点放在实际应用上。综述了变压器保护的一般原理和经济考虑。描述了变压器中的故障类型。讨论了保护系统的技术问题，包括系统故障期间电流互感器（CT）的行为。文中还讨论了故障清除和再通电等相关问题。重点放在实际应用上。综述了变压器保护的一般原理和经济考虑。描述了变压器中的故障类型。讨论了保护系统的技术问题，包括系统故障期间电流互感器（CT）的行为。 还讨论了相关问题，如故障清除和重新通电。

The scope of this guide includes general philosophy, practical applications, and economic considerations involved in power transformer protection. Emphasis is placed on practical applications. General philosophy and economic considerations in protecting transformers are reviewed. Types of faults in transformers are described. Technical problems with the protection systems, including the behavior of current transformers (CTs) during system faults, are discussed. Associated problems, such as fault clearing and reenergization, are discussed as well. Emphasis is placed on practical applications. General philosophy and economic considerations in protecting transformers are reviewed. Types of faults in transformers are described. Technical problems with the protection systems, including the behavior of current transformers (CTs) during system faults, are discussed. Associated problems, such as fault clearing and re-energization, are discussed as well.