Читать книгу Elevator Troubleshooting & Repair - David Herres - Страница 4
ОглавлениеCONTENTS
Elisha Graves Otis Invents Safeties
AC and DC Electric Motor Maintenance, VFD Troubleshooting, and Diagnostic Procedures
Machine Room
Bearings
Motor Shaft and Bearing Current
Vibration Analysis
Motor Drive Alignment
Electrical Issues
Diagnosing Three-Phase Circuits and Motors
Testing Components
Study Questions
CHAPTER 4
Advanced Motor Repair
What It Takes
Some Examples
Surge Testing
Core-Loss Test
Detecting and Analyzing Motor Vibration
Bearing Maintenance
More on Vibration Analysis
Hydraulic Rope Equalizers
Passenger Rescue from a Stuck Car
Traveling Cable
Lubrication and Oil Analysis
Study Questions
CHAPTER 5
Troubleshooting Elevator Systems
Study Questions
CHAPTER 6
Electrical Troubleshooting Tools and Instruments
Test Lights
Multimeters
Non-Contact Meters
Power Quality Measurements
Oscilloscopes
PC Based Spectrum Analyzer
Thermal Imager
Study Questions
CHAPTER 7
Measuring Power Quality: How It May Be Improved
Three-Phase Configurations
Total Harmonic Distortion Measurements
Catastrophic Transformer Failure
Costly Harmonics
Power Factor
What’s All This About Sine Waves?
Three-Phase Motors
Oscilloscope
Fourier Transform
Study Questions
CHAPTER 8
Elevator System Overview
National Electrical Code
Study Questions
CHAPTER 9
Motion Controller
Programmable Logic Controllers
Specific Operating Modes
Car Top Operating Station
Study Questions
CHAPTER 10
Systems Connected to Elevator Installations and How They Work in Concert
Emergency Power
Tests and Maintenance
Normal Electrical System
Wiring Methods for Elevator Shafts, Pits, and Machine Rooms
Study Questions
APPENDIX A
Study Questions Answers
APPENDIX B
Electrical Laws and Equations
Index
