The HVACR Training Authority™

Online Store


This item was added to your cart


sku# SH-RD-XS
  • Color: Red
  • Size: XS
Quantity 1 x $9.00
Total $9.00
Shopping Cart Total $27.00
Home eLearning Electricity Module 9 - Alternating Current: Reactance, Impedance & Power Factor

Module 9 - Alternating Current: Reactance, Impedance & Power Factor


View Larger / Alternatives >>

Alternative Views
  • There are no alternate images available for this product.
SKU#     800-009e


Module 9 - Alternating Current: Reactance, Impedance & Power Factor

For group or company purchases of RSES eLearning, please do NOT order here. Instead, contact RSES Headquarters – 800-297-5660, x.2337 (or – to ensure the best registration process and discounted prices available!


Price: $60.00


Alternating Current: Reacance, Impedance & Power Factor


Calculation of the different resistance introduced in an ac circuit by capacitors, inductors, and resistors and the concept of power factor

Upon the completion of this module, you will understand how to:

1. Calculate the capacitive reactance of a circuit, given the value of the capacitor, frequency, and voltage.
2. Describe the relation between capacitive reactance and frequency.
3. Calculate the inductive reactance of a circuit, given the value of the inductor, frequency, and voltage.
4. Describe the relation between inductive reactance and frequency.
5. Calculate the impedance of a circuit, given the values of the inductive and capacitive reactance, and the resistance.
6. Explain the term "Power Factor."
7. Define "apparent" power and the "true" or "actual" power of a circuit.
8. Calculate the power factor.
9. Explain three-phase power.

Topic 1: Reactance

* Topic Introduction and Objectives
* Three Forms of Reactance
* Capacitive Reactance: Equation
* Calculating Capacitive Reactance: Example
* Calculating Reactance at Higher Frequency
* Inductive Reactance: Equation
* Calculating Inductive Reactance: Example
* Calculating Inductive Reactance at Higher Frequency
* Check-Point Question
* Topic Summary

Topic 2: Impedance

* Topic Introduction and Objectives
* Impedance: Equation
* Calculating Impedance
* Calculating Impedance for an AC Solenoid Coil
* Check-Point Question
* Topic Summary

Topic 3: What Is Power Factor?

* Topic Introduction and Objectives
* Apparent Power Versus Actual Power
* The Iron Effect
* Topic Summary

Topic 4: High and Low Power Factors

* Topic Introduction and Objectives
* Ratio of Actual Power to Apparent Power
* Three Reasons Low Power Factor is Costly
* Understanding Apparent Power and Actual Power
* Calculating Power Factor Percentage
* Check-Point Question
* Topic Summary

Topic 5: Three-Phase Power

* Topic Introduction and Objectives
* Sine Waves for Three-Phase Circuit
* Check-Point Question
* Topic Summary
* Assessment


If you are not satisfied with this product RSES will provide you with a full refund up to 30 days after purchase. Additional terms may apply.

RSES is the leading education, training and certification preparation organization for HVACR professionals. RSES publishes various comprehensive industry training and reference materials in addition to delivering superior educational programs designed to benefit HVACR professionals at every stage of their careers through instructor-led training courses, online training for HVAC, educational seminars, interactive CD and DVD products, industry-related reference manuals, and helpful technical content through Service Application Manual chapters, the RSES Journal, the RSES Journal archives and feature articles, as well as web-exclusive features.

Beginning with basic theory and extending to complex troubleshooting, training courses covering refrigeration and air conditioning, heating, electricity, controls, heat pumps and safety may be conducted in a classroom environment or though self study. RSES publications may be purchased by schools, contractors, manufacturers or any other industry group wanting to conduct comprehensive training programs. Seminars covering air conditioning troubleshooting, electrical troubleshooting, compressor training, condenser training, refrigerant piping practices, DDC controls, and more are held in various cities across North America.

Select training programs offer Continuing Education Units (CEUs) and NATE Continuing Education Hours (CEHs).

In addition, RSES offers industry certification preparation materials for refrigerant handling (EPA Section 608), R-410A and North American Technician Excellence (NATE) examinations.

RSES’ monthly magazine, RSES Journal, serves HVAC contractors, service technicians, students, operations/maintenance managers, engineers and technicians who work in the residential, light commercial, commercial and institutional markets on air conditioning, warm-air heating, refrigeration, ventilation, electrical, ice machines, chillers, hydronic heating, piping, refrigeration control and energy management, building automation, indoor air quality and duct cleaning, and sheet metal fabrication equipment and/or systems.
©2011 RSES. All Rights Reserved.