Design/Build Job Saves High-rise Owners Money
Apr 1, 1998, Joseph R. Knisley
When Cleveland Electric, Atlanta, was hired on a design/build basis as the installing contractor for the renovation project of the William Oliver Building,...
Design/Build: Hard Facts About Software
Apr 1, 1998, John Chaney and Mark Lamendola
Does the new era of design/build mea you need a massive library of software to stay competitive? Some people say yes. The truth? All you need is a handful...
Uninterruptible Power Supplies: Distributed vs Centralized?
Mar 1, 1998, Shawn Smith
If you base your answer to this question on a thorough analysis, you could avoid a major blunder as well as unplanned equipment downtime.Which is a better...
Protecting Generators From Overload
Feb 1, 1998, Lawrence Bey
Pay close attention to how you size overload protection for generators. Now there's new technology that lets you better coordinate that protection with...
Clearing The Mystery Of Protective Relays
Jan 1, 1998, John A. DeDad
MV system coordination doesn't have to be complicated, as long as you know the types of protective relays available, their function, and how they work.Recently,...
Using Interlocked-Breakers For Maintainable Automatic Power Transfer
Jan 1, 1998, James D. Martin
Space limitations forced a design-build company to use a novel approach to critical load transfer without interruption. Continuous facility operation...
When Is A Circuit Breaker Not A Circuit Breaker?
Jan 1, 1998, John W. Young and Ray Clark
Not all resettable overcurrent protective devices are circuit breakers; some are supplementary protectors. So how do you know one from the other?When...
Workspace Access For Large Equipment
Dec 1, 1997, Frederic P. Hartwell
If you design or install large equipment layouts, you need to watch out for special rules covering access to the required workspaces. Don't get confused...
Prime Movers, Voltage Regulators, And Power Generation-Part 1
Nov 1, 1997, Woodrow "Chip" Saccoccio, P.E.
AT A GLANCE: AC power generation is no longer the exclusive domain of utilities. Many contractors and non-utility maintenance people now have responsibility...
Using overcurrent protection for generator conductors
Dec 1, 1996, Hartwell, Frederic P.
What does the NEC actually require in the way of overcurrent protection for conductors supplied by a generator?One of the more confusing areas of the...
Preventing condensation in 3-phase AC motors.
Nov 1, 1996, Ryan, Thomas J.
Here's how to select and install resistance heaters for reliable operation of motors in damp locations.You can avoid condensation problems in motors by...
Critical data for sizing gen-sets
Nov 1, 1996, Olson, Gary L.
The complexities of modern loads, such as PWM power supplies, variable frequency drives, and other electronic equipment, place a whole new light on sizing...
Transient voltage spikes can harm solid-state starters.
Nov 1, 1996,
Why do these devices, a though generally reliable, sometimes fail unexpectedly?Since their introduction in the late 1950s, solid-state contactors and...
Calculating temporary power from multiple panels for multiple loads.
Nov 1, 1996, Lawrie, Robert J.
Q We recently had a problem providing temporary power to numerous pieces of 208V, single-phase equipment of various sizes. Sources of power were a number...
Power resources
Nov 1, 1996,
Transformers, engine-generators, power supplies, and batteries are important components of power distribution systems, and their improved performance...
