What Is a Distribution Line?

Distribution circuit (English: distribution circuit) refers to the line that sends power from a step-down substation to a distribution transformer or from a distribution substation to a power consumer.

Distribution line

The voltage of the distribution line is 3.6kV ~ 40.5kV, which is called a high-voltage distribution line; the distribution voltage does not exceed 1kV, the frequency does not exceed 1000Hz, and the DC does not exceed 1500V.

First, the characteristics of the step-by-step voltage electric shock accident of the distribution line:

(1) Electric shock is caused by

Regular inspections of distribution lines can grasp the operating status of the lines, timely find defects and hidden dangers that threaten the safe operation of the lines along the lines, thereby improving the reliability of power supply and reducing the occurrence of line accidents.

This book is based on the "People's Republic of China Occupational Skills Appraisal Specification · Distribution Lines", Vocational Skills Appraisal Guide and Distribution Line Workers

Foreword

Chapter 1 Basic Knowledge and Related Knowledge

The first section of the DC circuit

Basic electromagnetic knowledge

Section III Single-Phase AC Circuit

Section IV Three-Phase AC Circuit

Basic knowledge about mechanics

Section 6 Explanation of Technical Terms for Overhead Power Lines

Application of Meteorological Conditions

Section VIII Common Electrical Graphic Symbols and Text Symbols

Review Questions and Exercises

Chapter II Distribution Lines and Production Safety