本标准的范围包括对用于表示继电器运行特性曲线形状的各种现有分析技术的审查，并提出典型运行特性曲线形状的分析（公式）表示，以促进微处理器或计算机继电器应用中可用反时限继电器特性的一些标准化。

The scope of this standard includes the review of various existing analytic techniques used to represent relay operating characteristic curve shapes and proposes analytical (formula) representation of typical operating characteristic curve shapes to foster some standardization of available inverse-time relay characteristics provided in microprocessor or computer relay applications.