This page features links to summaries of featured technical articles, by Richard L. Nailen, P.E., which have been published in Electrical Apparatus. To order back issues, which contain the foreign language summaries and the full article, call 313-321-9440 or visit our online webstore.

The Fire Ant Problem

The Numbers Game, Part 1: Motor Efficiency and the “Big Picture”

Peas in a Pod — Are They, Really?

Stop, Look, & Listen- Coming March 2016

Avoiding Damage to Motors in Storage- February 2016

Managing Motor Overloads – January 2016

Do’s and Don’t’s for evaluating motor operating cost – December 2015

What do we mean by motor temperature? – November 2015

September 2015 – The Three C’s of Specification Writing

August 2015 – Electrical Workplace Safety Standard Continues to Evolve

July 2015 – Progress? The new NFPA standards-making system

June 2015 – True or False?

May 2015 – Confused about Grounding? You’re Not Alone.

April 2015 – When “Replace” is the Choice

March 2015 – Liquid Cooling for Motors

February 2015 – Another Look at Core Loss

January 2015 – Root cause analysis: methodology or mythology?

December 2014 – Motor installation depends upon foundation design

November 2014 – Arc blast not a concern for switchgear alone

October 2014 – Relubricating with grease: Is there a right way?

September 2014 – Evaluating Motor Service Providers

August 2014 – Is this finally the final Final Rule?

July 2014 – Solar Power – Boom or Bust?

June 2014 – Motor Application Engineering – A Lost Art?

May 2014 – Dealing With Torsional Vibration in Motor Shafts

April 2014 – Determining full-load motor temperature from no-load tests

March 2014 – Motor thermal models can be confusing

February 2014 – Are efficiency upgrades practical for the service center?

January 2014 – How useful are efficiency estimates?

December 2013 – The wind turbine’s weak link

November 2013 – Accelerating Torque – Don’t Take it for Granted

October 2013 – Shaft seals: one problem, many solutions

September 2013 – Installation and maintenance determine capacitor longevity

August 2013 – The limitations of the Motor Primer

July 2013 – NEMA Standards MG 1: what’s there . . . and not there

June 2013 – Routine motor tests: What do they tell us?

May 2013 – The ‘short circuit’ or ‘withstand’ rating

April 2013 – Is higher motor efficiency possible?

March 2013 – Business still booming for counterfeit products

February 2013 – Repair or replace? Not an easy decision

January 2013 – Acronyms: breaking the code

December 2012 – Arc Blast: Still on a Learning Curve

November 2012 – Keeping idle motors dry

October 2012 – What kind of document is the National Electrical Code?

September 2012 – Can tests prove ASD motor efficiency?

August 2012 – Magnetic slot wedges: a mature technology?

July 2012 – When, and how, to use Belleville washers

June 2012 – Understanding the load speed-torque curve

May 2012 – Energy savers: claims vs. reality

April 2012 – A simple series circuit . . . or is it?

March 2012 – Consider output rating before buying a motor

February 2012 – Conduit systems: essentials in electrical distribution

January 2012 – The NFPA’s 2012 Electrical Safety Standard

December 2011 – The IECEx Scheme

November 2011 – Design and construction of motor ventilating fans

October 2011 – Still Confused About Power Factor?

September 2011 – The fuss over burn-off ovens

August 2011 – Witnessing motor manufacturing

July 2011 – How consistent is motor efficiency?

June 2011 – Collectors: how they’re made and how they work

May 2011 – The measurement of power

April 2011 – A review of megohmmeter testing practices

March 2011 – Converting Wound-Rotor Motors to Squirrel-Cage

February 2011 – What do we mean by motor ‘starting’ and ‘inrush’ current?

January 2011 – It’s that time again – The 2011 National Electrical Code

December 2010 – The top four electrical misunderstandings

November 2010 – Fuses: An old technology with some new twists

October 2010 – Can rotor bar tightness be assured?

September 2010 – Pump repair – a natural for the service center

August 2010 – Is there new life for magnetic bearings?

July 2010 – Can rotor bar tightness be assured?

June 2010 – Small motor efficiency requirements: here at last?

May 2010 – Counterfeit electrical products: A worldwide problem

April 2010 – The AFCI: as controversial as ever

March 2010 – Understanding the speed-torque curve

February 2010 – When voltages don’t quite match: Buck-boost transformers

January 2010 – Electric Light – the Second Revolution

December 2009 – Conservative motor design: What does it mean?

November 2009 – A close look at the autotransformer starter

October 2009 – What is insulation, anyway?

September 2009 – Apparatus Ratings at High Elevations

August 2009 – A Review of Insulation Test Standards

July 2009 – Concerns About Basic Motor Control Circuits

June 2009 – Reactor starting: still useful for large motors

May 2009 – Thermal rating of circuit conductors

April 2009 – Electrotechnology north of the border

March 2009 – Is that motor overloaded?

February 2009 – When long acceleration is desirable: the centrifuge drive

January 2009 – How is V-belt pull determined?

December 2008 – Some tips for evaluating motor operating cost

November 2008 – Circuit resistance, a not so simple property

October 2008 – U.S. finalizes distribution transformer efficiency standards

September 2008 – Earth: electrical conductor or not?

August 2008 – Motor efficiency in the U.S.: the next step

July 2008 – Electrotechnology north of the border

June 2008 – How often can that motor be started?

May 2008 – Finding the best way to drive a belt conveyor

April 2008 – IEEE Guide Enters Motor Diagnostic Field

March 2008 – Tricks and traps in three-phase winding connections

February 2008 – Sleeve bearings: modern use of an old technology

January 2008 – Understanding the Three-Phase Delta

December 2007 – Motor control a la Nola: A durable technology

November 2007 – A closer look at voltage drop

October 2007 – A new standard for large drives

September 2007 – New horses in the motor efficiency derby

August 2007 – Before you buy – a motor purchasing checklist

July 2007 – What determines motor end play?

June 2007 – Circuit breaker servicing: Is it for you?

May 2007 – Motor efficiency versus reliability: Is it an issue?

April 2007 – How maps reveal field behavior

March 2007 – An update on flicker

February 2007 – Are electronics hazardous to your health? – Part II

January 2007 – Are electronics hazardous to your health? – Part I