General Description
This course highlights electrical maintenance procedures
for all types of A.C. crane controls including A.C. full magnetic,
stepless and adjustable frequency drives and is considered
the basic orientation to electrical maintenance.

Course Objectives
• Identify the function and operation of single speed, two speed, step type, secondary reactor and adjustable frequency
A.C. crane controls
• Analyze power and control circuits
• Identify problematic motor symptoms and correct their causes
• Perform control system inspections, tests and adjustments
• Analyze operating characteristics for troubleshooting control system
failures
• Test, adjust and troubleshoot control components
• Understand how the plugging, overload and travel limit protection
circuits operate individually and in combination
• Perform brake electrical inspections, tests, adjustments and
trouble shooting
• Perform electrical inspections
• Perform electrical preventive maintenance procedures