Motor Calculations Part 2: Feeders
May 1, 2004, By Mike Holt, NEC Consultant
What’s the correct way to size motor feeders and related overcurrent protection?...
Motors, Motor Circuits, and Controllers, Oh My!
May 1, 2004, By Mike Holt, NEC Consultant
Don’t be intimidated by the largest chapter of the NEC...
The Oft Misinterpreted Requirements of Stationary Battery Systems
Apr 1, 2004, By Stephen W. McCluer, American Power Conversion
With current codes behind the state of battery technologies, inspectors may apply obsolete rules or misapply them entirely...
A/E/C Firm Executives Anticipate Rise in Design/Build Work
Apr 1, 2004,
About 80% of architecture, engineering, construction, and integrated design/build firm leaders who responded to a recent survey expect an increase in the use of design/build over the next five years...
Motor Calculations Part 1: Motors and Branch-Circuit Conductors
Apr 1, 2004, By Mike Holt, NEC Consultant
Overcurrent and short-circuit protection aren’t the same for motors...
Minimizing AC Induction Motor Slip
Apr 1, 2004, By Mauri Peltola, ABB Drives and Motors
Although slip is a common problem with standard motors, several options exist for reducing its effects...
Flywheel Technology Helps Life Spring Eternal for Battery Systems
Apr 1, 2004, By Scott Richey, Active Power
Running a flywheel energy storage system in parallel with VRLA batteries can lengthen their service life and improve reliability...
IEEE-SA starts work on new standard
Mar 2, 2004,
Document covers harmonic limits on power systems...
Ensuring Generator and UPS Compatibility
Feb 13, 2004, By John G. Tracy, Powerware
By understanding the operational characteristics, load interaction, and control design of generators and UPS systems, you can ensure your power system provides high levels of reliability...
Photovoltaic Systems: Harnessing the Power of the Sun
Feb 1, 2004, By Amy Florence Fischbach, Staff Writer
Designers are blending energy-producing systems into urban architecture to reduce the nation's dependence on the grid and produce clean, green power...
Growth in Consulting Engineering Firms Due to Outpace Other Fields
Jan 1, 2004, By EC&M Staff
Despite the discouraging employment figures for 2003, engineers could see a surge in employment in the design industry......
The Trouble With Capacitors Part 2
Jan 1, 2004, R. Fehr, P.E., Engineering Consultant
Here's how to reduce the effect of capacitor switching on your power system...
Protecting Critical Systems: The Role of the Engineer
Dec 30, 2003, By Kevin Stoll, Liebert
The constant blending of IT and power systems management is taking control away from facilities managers and threatening to reduce the quality of infrastructure design...
Specifying the Right Fuse for Circuit Protection
Nov 13, 2003, By John DeDad, Editorial Director
Choosing a fuse isn’t what it used to be. Know the basics before you specify them...
Common Misunderstandings in Overcurrent Protection
Nov 1, 2003, By George Gregory, Schneider Electric/Square D Co.
Do you know the facts about circuit protection, or have you just been relying on what you hear around the shop?...
Drawing the Line in the Design Milieu
Oct 1, 2003, By Ralph Crawford, P.E.
Disregard for lock-out/tag-out at a cheese factory isn't enough to overshadow a contractor's responsibility to safe design...
Approaches to Extremely Reliable Power
Oct 1, 2003, By T. A. Short, M. W. Howard, and A. Maitra, EPRI-PEAC Corp.
Facilities can evaluate and optimize power quality solutions for improved reliability...
Overcoming Transformer Losses
Aug 29, 2003, By Philip J.A. Ling, P.E., Powersmiths Corp.
A more efficient transformer can pay
for itself many times over during its
25-year lifespan...
NEMA releases revised standard on motors and generators
Aug 25, 2003,
MG 1 is used by manufacturers and electric motor and generator operators as a reference guide for dimensional and performance standards....
How to Select the Right Energy-Efficient Dry Type Transformer
Aug 15, 2003, By Mark Fairhead, Eaton/Cutler-Hammer
The selection process follows the old saying, ‘Pay me now, or pay me later’...
