Here is the English translation of the provided text: "Production Technology Standards Compilation of Power Supply and Distribution Enterprises - Substation and Transmission Volume - Low Voltage Apparatus Sub-volume" Note: The line breaks ("") are preserved as per your instructions.

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Features: To adapt to the needs of the power industry development, strengthen the management of power industry standards, promote the implementation of standards, and meet the demand of power system engineering technicians and scientific and technical management personnel for standards, China Standard Press has summarized and organized the current power system standards and standards used by power distribution enterprises based on the actual situation of power distribution enterprises, and organized to edit this set of "Production Technology Standards for Power Distribution Enterprises." This set of compilations collects the commonly used national standards, power industry standards, and relevant mechanical industry standards of power distribution enterprises issued by the end of June 2001. All standards included in this set are current and valid. This compilation is the "Low-Voltage Apparatus Sub-series of the Transmission and Distribution Volume of the Production Technology Standards for Power Distribution Enterprises," which collects a total of 53 national standards for low-voltage equipment, 3 power industry standards, and 6 mechanical industry standards.