The 4-1-1 on Variable-Frequency Drives

Basic design and operation principles behind variable-frequency drives (VFDs)

May 24, 2011 Rajan Battish, P.E., LEED AP, RTKL | Electrical Construction and Maintenance

Understanding the basic design and operation principles behind VFDs will simplify selection, operation, and maintenance

Discuss this Article 0

Post new comment

White Papers

LED Industrial Lighting: Common Myths and Facts

LEDs have unique and compelling characteristics that make them ideal for industrial lighting applications. But there are a variety of misconceptions about LEDs, how well they work, how long they last, and more. Digital Lumens developed this whitepaper to dish up the facts around LEDs and address some common misunderstandings....More

Understand Arc Flash Safety for Motor Control Centers

An arc flash is associated with the explosive release of energy caused by an electrical arc, due to either a phase-to-ground or a phase-to-phase fault. This kind of fault can result from many factors – a dropped tool, accidental contact with electrical systems, buildup of conductive dust, corrosion or improper work conditions.....More

VIEW MORE WHITE PAPERS

EC&M Learning Center

2011 Electrician Exam Preparation Book & Journeyman Simulated Exam

Printed in full color, the 2011Exam Prep book covers Theory, Code, and Calculations in great detail. Clear colorful graphics...

2011 Understanding NEC Requirement for Solar Photovoltaic Systems

Solar power is new to most in the electrical industry and this expanding and exciting industry has created many NEC...

Photovoltaics for Commerical and Utilities Power Generation

This book provides an in-depth review of the solar industry development, and present-day state of the art, emphasizing...

BROWSE ALL TITLES

Webinars

ON DEMAND: All You Ever Wanted to Know About GFCIs & AFCIs

Abstract: In this webinar, Mike will not only explain the current NEC requirements for GFCIs and AFCIs, but he'll explain how they operate, what causes their premature failure, and when they won't provide the safety protection you might have thought they would.

Sponsored by:

ON DEMAND: Workplace Electrical Safety: Prevention before Protection

Abstract: This webinar will teach attendees the difference between risk and hazard, and how the choice of system grounding has a direct impact on reliability and safety.

Sponsored by:

MORE WEBINARS

EC&M TV

Apr. 15, 2013

video

Protection From Arc Flashes

Learn how arc flashes happen, how they are measured and how wearing the right flame resistant clothing can keep workers safe....More