For individuals who have some experience and knowledge in the subject matter. It builds upon the foundational concepts and expands the breadth and depth of understanding.

Participants will be able to: 

• Explain the fundamental operating principles of three phase AC induction motors used in pumping systems.
• Differentiate between motor types and enclosures and appropriateness for a given application environment.
• Describe coverage and alignment between NEMA and IEC motor standards, including frame designations, efficiency classes, and torque design.
• Evaluate motor application considerations such as service factor, insulation class, load types, and starting methods for sizing and specification.
• Describe the architecture and function of variable frequency drives (VFDs), including types, key components, control methods, and PID controller operation.
• Identify VFD application considerations, including electrical system requirements, harmonic mitigation strategies, and environmental factors that affect installation and performance.
• Apply best practices for VFD installation, including proper grounding, cabling, and electrical protection to ensure efficient, reliable and safe operation.
• Oversee basic maintenance and troubleshooting on both motors and VFDs used in pumping systems that use systematic techniques to diagnose electrical, mechanical, and hardware issues.
• Analyze pump and system curves to determine operating points, and explain how variable speed control affects flow, pressure, power, reliability and energy consumption.
• Evaluate variable speed pumping solutions, including power drive system sizing, pump system efficiency, and control strategies for optimizing performance.

• Technical professionals with basic knowledge of pumps and pumping systems. 
• Engineers with approximately 1–5 years of experience in the fluid handling industry.  
• Technical sales, maintenance, and operations personnel seeking to expand their expertise on motor and VFD selection, installation, operation and troubleshooting related to variable speed pumping.

Upon completing this course, participants will be able to select, size, and apply low voltage AC motors and variable frequency drives for pump systems, with a working knowledge of NEMA and IEC standards, enclosure ratings, torque characteristics, and power drive system configurations. They can evaluate the application, installation and operation to diagnose common variable speed pumping issues using structured troubleshooting techniques.

Section 1 – Motors

• General function: types, construction, single/three-phase operation, motor speed.
• Installation considerations: NEMA/IEC standards, frame designations, mounting, driven equipment connections.
• Application considerations: service factor, insulation systems, torque curves, load types, starting methods.
• Maintenance & troubleshooting: safety, scheduled maintenance, lubrication, alignment, insulation testing, long-term storage, power quality and typical failure modes.

Section 2 – Variable Frequency Drives (VFDs) 

• General function: terminology, VFD architecture (rectifier, inverter, controller), operator interface, electrical requirements.
• Application considerations: environmental derating (temperature, altitude), electrical systems (delta, single-phase), PID control, VFD features, harmonics and mitigation.
• Installation: cooling, enclosures, grounding, power quality, cabling, short circuit protection.
• Maintenance & troubleshooting: safety, cleaning, EMI issues, fault codes, monitoring, hardware troubleshooting.

Section 3 - Power Drive System & Variable Speed Pumping 

• PDS definition, benefits, and sizing: system-level perspective, load types, speed range, VFD frequency considerations.
• PWM effects on motors: voltage spikes, dV/dt, common mode voltage, shaft currents, bearing protection (grounding rings, insulated bearings).
• Variable speed pumping: pump curves (rotodynamic vs. positive displacement), affinity rules, system curves, operating points, power/torque calculations, energy savings, control strategies and examples.