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Unlock the Mysteries & Dispel the Myths of VFDs!
“I can now troubleshoot with confidence”
Rick Stark – Facilities Specialist – Baker Petrolite
“Got answers to questions I face in my job daily”
Todd Stevenson – Facility Technician – Cadbury SBS
“Complex information explained in simple terms”
Dale Fessenden – Building Mechanic – City of Portland
“More covered in two days than I thought possible.”
Michael Fitzsimmons – Specialist II – Olean General Hospital
Purpose of Seminar:
If your building facility, plant equipment or OEM system has Variable Frequency Drives,
this is the perfect opportunity for you to unlock the secrets and dispel the myths
generally associated with these high tech devices. After attending this seminar you will
go back to your workplace with real world, practical knowledge and be able to immediately
apply what you have learned so that you can keep your equipment up and running. This
seminar will teach you how to troubleshoot common VFD problems, take care of your own
equipment, and avoid costly repairs or service calls. Now that’s “Real World” training!
Training Outcomes
Upon completion of this course, the student will receive a training certificate indicating
that he or she has learned to:
- Identify hazards associated with working on VFDs
- Understand the importance of safe work practices
- Troubleshoot problems associated with VFDs and associated automated control systems
- Recognize the main components of a VFD system
- Understand the different methods of controlling a VFD
- Be familiar with installation requirements
- Understand motor/load requirements
- Know how to respond to various WARNING or FAULT indications on the VFD
- Know the preventative maintenance requirements when using VFDs
Course Outline / Agenda
This seminar is designed for any person requiring a general knowledge and understanding of
Variable Frequency Drives (VFDs). In the area of Facilities Maintenance we’ll cover
specific applications involving HVAC equipment such as air handlers, hot water and chilled
water pumps, and cooling tower fans. In the realm of Industrial Maintenance we’ll look
at a variety of other specific applications including those requiring constant torque
operation. And if you have a unique VFD application, just let our instructor know.
If he can’t help you with your specific problem, we’ll refund your money – guaranteed!
Equipment operators, technicians and maintenance personnel as well as electricians and facility
managers will benefit from attending this seminar. Course graduates will have learned how
to solve common VFD problems resulting in reduced downtime. This means a lower cost of
operation with less dependence on outside service contractors. Training will include AC
motors, VFD configuration, component layout, applications, various control methods, and
installation requirements. Common problems and troubleshooting techniques will be covered
as well as VFD operation, setup, programming and preventative maintenance. Other related
topics like power quality and harmonics will also be discussed. And to be 100% certain you
get the training you need, students are encouraged to bring schematics and diagrams of the VFD’s
in their own facility!
DISCUSSION TOPICS –
VFD SAFETY ISSUES
- (PPE) Personnel Protective Equipment
- Safe Approach distances
- Electrical Hazards
- LOTO (Lockout – Tagout)
- Insulated Tools
METER REVIEW
- Mulitmeter
- Clamp-On
- Megohmmeter
MOTOR BASICS REVIEW
- Motor Design
- Single Phase and Three Phase
- Motor Starters
- Motor Troubleshooting and Replacement
CONTROL CIRCUIT BASICS
- Electrical Symbols and Schematics
- Control Circuit Troubleshooting
- Fuse Replacement
VFD HISTORY
- Introduction
- Semiconductors in VFD Design
- SCR’s / GTO’s / Transistors / IGBT’s / LSI
WHAT VFD’s DO
- Motion Control / Motor Speed
- Air Flow / Pressure Control
- Liquid Flow / Pressure Control
- Eliminates the need for:
- Variable Transmission or Sheave
- Variable Vanes or Dampers on Fans
- Variable Valves on Pumps
BENEFITS OF USING A VFD
- Energy Savings
- Easier Maintenance
- Enhanced System Monitoring
LOAD TYPES
- Constant Torque – Conveyors, Positive Displacement Pumps, Superchargers
- Variable Torque - Centrifugal Fans or Pumps, Saws, Routers, Planers
VFD OPTIONS
- Bypass - Two or Three Contactor Style, Disconnect Switch Style, Soft Starter
- Fusing - VFD or Bypass Protection
- Input / Output Reactors
- Motor Overload Device
- Transient Protection
- Auxiliary Relays
- Power Line Phase Reversal Detection
INSTALLATION OF A VFD
- Environmental Concerns
- Clearances
- Conduit Entry
CUSTOMER CONNECTIONS
- Safety Circuit
- Start / Stop
- Jog
- Status Indication
- Fault Indication
- Remote Speed Reference
- Monitoring of Motor Parameters
WIRING & GROUNDING VFD’s
- Induced Signals
– Inductive, Capacitative
- Incoming Power (line) Wiring
- Motor (load) Wiring
- Control Wiring
- Proper Grounding Methods
CONTROLLING A VFD
- Keypad Controls
- Terminal Strip Control – Automatic, Manual
- Bus Communication Control
- Open Loop Control
- Manual Operation
- Automatic Operation
- Sensorless Flux Vector
- Closed Loop Control
- PI Loop Configuration
- Sensor or Transducer Feedback
- Motor Shaft Encoder Feedback
VFD SETUP, PROGRAMMING and TROUBLESHOOTING
- Language & Display
- Control Modes
- Open Loop, Closed Loop
- Motor Data
- Motor Power (kW) and RPM
- Voltage, FLA Current
- Service Factor, Power Factor
- References & Limits
- Motor Speeds – Min, Max and Preset
- Ramp Times
- Speed Reference
- Skip Frequencies
- Limits for Alarms or Faults
- Inputs / Outputs – Analog, Digital, and Relay
- Application Functions
- Reset
- Flying Start
- Sleep Mode
- Switching Frequency
- No Load
- Phase Loss
- Closed Loop Functions
- Normal / Inverse
- Anti Windup
- Start-up Frequency
- Integral Time / Differential Time
- Proportional Gain / Differential Gain
- Lowpass Filter
What You Will Take Home
• American Trainco Seminar Manual - detailing all presentation
material covered in the class
• Personalized
Training Certificate with 1.6 CEUs (Continuing Education Units) for attending this
two-day seminar. American Trainco
CEUs are approved by the MTAA.
• All the information you need from asking our instructors specific
questions about your own equipment or facility.
On Site and In House Training
You can bring the Variable Frequency Drives
class or any American Trainco seminar to your plant
or facility for groups of generally 6 or more. We offer dozens
of courses covering a broad range of maintenance and maintenance
management topics. Our expert instructors are among the most experienced
in the industry and can customize training to meet your specific needs
- whether you need a short refresher course or an in depth program that
focuses on your equipment and processes. In house training allows for
the most cost efficient training as it reduces the cost per employee
and limits the time required away from work.
Request a quote
for on site training
No Risk Registration & Money-Back Guarantee
U.S. and Canada
If you're not yet sure you'll be able to attend a seminar, you can still make a reservation to hold your space in class. While payment is due prior to the start of the seminar, you may choose a full refund or credit for cancellations made at least 24 hours in advance. Student substitutions can also be freely made at any time prior to the start of the seminar. Refunds will not be issued for registered attendees who fail to show up and have not given a notice of cancellation.
In the rare event that should you not receive the expected value after attending our seminar, simply notify us in writing of your reasons and your money will be promptly refunded.
International and Overseas
If you're not yet sure you'll be able to attend a seminar, you can still make a reservation to hold your space in class. However, payment for international and overseas students must be made prior to the start of the seminar (in Dollars U.S.), and all seminar fees are non-refundable. Student substitutions can be freely made at any time prior to the start of the seminar. American Trainco’s Money-Back Guarantee does not apply for international and overseas registrations.
CEUs, Testing & College Credit
CEUs
After completion of this class,
students will receive a Certificate of Completion and 1.6 CEUs (Continuing
Education Units) for both days of training approved by the Maintenance
Training Association of the Americas and The
American Council on Education.
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