VFD Training - Variable Frequency Drive Installation, Programming and Troubleshooting

VFD training teaches electricians, technicians and engineers how variable frequency drives work and how to select, install, program, commission and troubleshoot them safely, from the incoming power supply through the drive to the motor and driven load.

This 12-hour, two-day live online course is vendor-neutral. The skills apply to the drives you already have, whatever the brand. It earns 1.2 CEUs.

 

Why VFD Training Matters

Variable frequency drives now control most new motor loads in industrial plants, commercial buildings and water and wastewater facilities. Applied correctly, they cut energy use, soften starting and give precise process control. Applied poorly, they cause:

  • Nuisance trips and unplanned shutdowns
  • Overheated and failed motors
  • Damaged bearings
  • Harmonic distortion on the electrical system
  • Electrical noise that disrupts instruments and networks

Most of these problems come from three things: how the drive was selected, how it was installed and how it was programmed. Drives also bring hazards that are easy to miss. DC bus capacitors stay charged after the power is off. Drives can restart automatically. Many drives also have safety functions, such as Safe Torque Off, that technicians need to understand before working on the machine.

 

Course Overview

This course follows the whole drive system, step by step.

Day 1 explains how drives work and how to apply them:

  • Drive safety
  • AC motors for drive applications, including NEMA MG 1 Part 31 inverter-duty motors
  • Load types and energy savings
  • Inside the drive: rectifier, DC bus, IGBT inverter and PWM
  • Control methods: V/Hz, vector control and permanent magnet motors
  • How to select and size a drive

 

Day 2 covers installing, programming, commissioning and troubleshooting:

  • The incoming power system and harmonics (IEEE 519-2022)
  • Installation requirements under the NEC and the CE Code
  • Motor-side problems: reflected wave voltage, dv/dt and bearing currents
  • Control wiring, programming, PID control and communications
  • Commissioning and maintenance
  • A structured, safe troubleshooting method

Participants practise on the same problems they meet in the field:

  • Sizing a drive for a real load
  • Calculating energy savings with the affinity laws
  • Checking harmonic levels against IEEE 519
  • Setting up a drive from motor nameplate data
  • Diagnosing faults from real drive fault codes and measurements

The course is vendor-neutral and goes beyond single-brand manufacturer training. Participants learn how the drive, the motor and the electrical system work together, and they leave with skills they can apply to any make of drive.

 

Learning Outcomes

By the end of this course, participants will be able to:

  • Identify VFD hazards, including stored DC bus energy, automatic restart and arc flash, and apply safe work practices, lockout and Safe Torque Off requirements.
  • Explain how the rectifier, DC bus, IGBT inverter and PWM control produce variable speed and torque, and compare V/Hz, sensorless vector and closed-loop vector control.
  • Select motors and drives for constant-torque and variable-torque loads, using NEMA MG 1 Part 31, normal- and heavy-duty ratings, derating factors and braking options.
  • Assess how drives interact with the power system, and select harmonic mitigation such as line reactors, filters, multi-pulse drives and active front ends to meet IEEE 519-2022.
  • Install drives correctly to NEC Article 430 Part X and the CE Code, including disconnects, bypass, cooling, cable selection, grounding and EMI control. Prevent reflected wave and bearing current damage.
  • Configure and commission a drive: enter motor data, run autotune, set acceleration and deceleration, set up I/O and PID control, and connect to a control network.
  • Troubleshoot drives and motors with fault codes, safe measurement techniques and component testing, and set up a maintenance program that prevents failures.

 

Live online course schedule

October 19–20, 2026
10:00 am - 4:30 pm ET

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Who should attend

  • Industrial Maintenance Electricians
  • Electrical and Instrumentation Technicians
  • HVAC and Building Automation Technicians
  • Water and Wastewater Operators and Technicians
  • Millwrights and Multi-Craft Maintenance Personnel
  • Plant and Facility Electrical Engineers
  • Consulting and Design Engineers Specifying Drives
  • Project and Commissioning Engineers
  • Electrical Contractors and Supervisors
  • Energy Managers Evaluating Drive Retrofits

 

Course Benefits

  • VFD Training Course Certificate
  • 1.2 Continuing Education Unit (CEU) Credits (12 Professional Development Hours)
  • This Course Includes Our Latest Electric Motor and VFD Handbook Volume!! (Value $20)
  • $100 Coupon Toward any Future Electricity Forum Course (Restrictions Apply)
  • FREE Magazine Subscription (Value $50.00)
  • Course Materials in PDF Format

 

 

 

 

VFD Training Course Outline

 

DAY ONE

HOW VARIABLE FREQUENCY DRIVES WORK AND HOW TO APPLY THEM

 

MODULE 1 – VFD SAFETY

  • Electrical Hazards Unique to Drives
  • Stored Energy: DC Bus Capacitor Discharge and Verification
  • Automatic Restart and Remote Start Hazards
  • Lockout/Tagout for Drive Systems
  • Arc Flash Hazards in Drive Enclosures: NFPA 70E and CSA Z462
  • Safe Torque Off (STO) and Machine Safety Functions

 

MODULE 2 – AC MOTORS FOR DRIVE APPLICATIONS

  • Induction Motor Operation: Poles, Speed and Slip
  • Motor Nameplate Data Used to Set Up a Drive
  • Torque-Speed Curves and Motor Design Letters
  • Service Factor, Insulation Class and Temperature Rise on Drives
  • NEMA MG 1 Part 30 vs Part 31 (Inverter-Duty) Motors
  • Low-Speed Cooling and Constant-Torque Speed Range
  • Permanent Magnet and Synchronous Reluctance Motors

 

MODULE 3 – LOADS, MECHANICS AND ENERGY SAVINGS

  • Torque, Inertia and Acceleration
  • Constant-Torque, Variable-Torque and Constant-Horsepower Loads
  • Pumps, Fans, Conveyors, Compressors and Mixers
  • The Affinity Laws
  • Practical Exercise: Calculating Energy Savings on a Fan or Pump

 

MODULE 4 – INSIDE THE VFD

  • Rectifier Front End and Pre-Charge Circuit
  • DC Bus Capacitors and Bus Voltage
  • IGBT Inverter and Gate Drive
  • Pulse Width Modulation and Carrier Frequency
  • Current Sensing, Control Board and Cooling System
  • Drive Topologies: 6-Pulse, 18-Pulse and Active Front End

 

MODULE 5 – DRIVE CONTROL METHODS

  • Volts-per-Hertz Control and Boost
  • Sensorless Vector and Closed-Loop Vector Control
  • Torque Control and Encoder Feedback
  • Operation Above Base Speed
  • Controlling Permanent Magnet Motors

 

MODULE 6 – DRIVE SELECTION AND SIZING

  • Normal-Duty and Heavy-Duty Ratings and Overload Capacity
  • Sizing by Motor Current, Not Horsepower
  • Derating for Ambient Temperature, Altitude and Carrier Frequency
  • Regeneration, Dynamic Braking and Regenerative Units
  • Multi-Motor and Single-Phase Supply Applications
  • Practical Exercise: Sizing a Drive for a Real Application

 

DAY TWO

INSTALLING, PROGRAMMING, COMMISSIONING AND TROUBLESHOOTING

 

MODULE 7 – THE POWER SYSTEM AND HARMONICS

  • The Distribution System: Point of Common Coupling, Fault Capacity, Transformers and MCCs
  • How Drives Create Harmonic Currents
  • IEEE 519-2022 Current and Voltage Distortion Limits
  • Line Reactors, DC Chokes, Passive and Active Filters
  • Power Factor Capacitors and Resonance
  • Transients, Surge Protection and Ride-Through
  • Practical Exercise: Checking a Drive Installation Against IEEE 519

 

MODULE 8 – DRIVE INSTALLATION

  • NEC Article 430 Part X and CE Code Requirements
  • Drive Standards: UL 61800-5-1 and CSA C22.2 No. 274
  • Enclosures, Cooling, Clearances and Environment
  • Disconnects, Fusing, Contactors and Bypass Schemes
  • Feeder and Motor Cable Selection
  • Grounding, Bonding and Shield Termination
  • EMI and RFI Control

 

MODULE 9 – MOTOR-SIDE PROBLEMS

  • Reflected Wave Voltage and Cable Length
  • dv/dt Stress on Motor Insulation
  • Load Reactors, dv/dt Filters and Sine Wave Filters
  • Shaft Voltage and Bearing Currents
  • Insulated Bearings and Shaft Grounding Rings
  • Common-Mode Noise and Its Effects

 

MODULE 10 – CONTROL WIRING, PROGRAMMING AND COMMUNICATIONS

  • Keypad, Terminal and Network Control
  • Two-Wire and Three-Wire Start/Stop Control
  • Digital and Analog I/O: 4–20 mA and 0–10 V Speed References
  • Key Parameters: Motor Data, Ramps, Limits, Skip Frequencies
  • PID Control and Lead-Lag Pumping
  • Fieldbus Networks: EtherNet/IP, Modbus, PROFINET and BACnet
  • Parameter Backup and Drive Software
  • Live Demonstration: Setting Up a Drive From the Nameplate

 

MODULE 11 – COMMISSIONING AND MAINTENANCE

  • Pre-Commissioning Checks and Documentation
  • Insulation Testing Safely: Disconnecting Motor Leads From the Drive
  • Autotune, Rotation and Bump Testing
  • Load Testing and Recording Baseline Data
  • Preventive Maintenance: Cooling Fans, Capacitors, Connections and Thermography
  • Capacitor Reforming on Stored Drives

 

MODULE 12 – VFD TROUBLESHOOTING

  • A Structured Troubleshooting Method
  • Reading Fault Codes and Fault History
  • Common Faults: Overcurrent, Overvoltage, Undervoltage, Ground Fault, Overtemperature
  • Safe Measurements: Input, DC Bus and Filtered Output Voltage
  • Testing Diodes and IGBTs With the Drive De-Energized
  • Drive Problem or Motor Problem?
  • Capstone Exercise: Diagnosing Real Drive Failures

 

COURSE SCHEDULE

Both days:

Start: 10 a.m. Eastern Time
Finish: 4:30 p.m. Eastern Time

 

 

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Earn Continuing Education Unit (CEU) Credits

  • Successful completion of this course qualifies delegates to receive a certificate of course completion with indicated CEUs.
  • One CEU is equivalent to 10 professional development hours of instruction.
  • This course earns 1.2 CEUs.

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