Electrical Engineer Must Read

Author: Tianjin Municipal Electric and Mechanical Industry Corporation
Publisher:
Publish Date: 2001-05-01
Features: This book covers the knowledge requirements, skill requirements, and practical work examples that should be mastered by junior electricians and intermediate electricians. It adopts a method of corresponding with technical grade standards, explaining each requirement in the standards to help readers prepare for relevant vocational skill certification exams. At the end of the book, there are sample questions for vocational skill certification for reference.
1. Basic Knowledge
There are various types of electrical instruments, with commonly used ones including ammeters, voltmeters, clamp meters, megohmmeters (also known as insulating resistance testers), and multimeters. These instruments differ in structure, working principles, and operating conditions. When using them, different electrical instruments should be selected according to different measurement objects and requirements.
The faces of electrical instruments are marked with various symbols and text to indicate their basic performance, purpose, principles, accuracy levels, normal operating positions, and more. When using instruments, one should first understand the meaning of these symbols and text to ensure correct usage.