Brushless DC motors offer definite advantages in certain applications. So, should you automatically choose a brushless DC? After all, you're familiar with DC motors. Well, comparing brushless DC motors to brush-type motors may have a significant...
When Cleveland Electric, Atlanta, was hired on a design/build basis as the installing contractor for the renovation project of the William Oliver Building, it embraced the goal of General Contractor Ellis-Don: Save the building owner time and...
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 of packages to compete.To be a serious player (to get the profitable work and do it...
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 strategy for your Uninterruptible Power Supply (UPS) system: centralized or distributed? To...
Pay close attention to how you size overload protection for generators. Now there's new technology that lets you better coordinate that protection with downstream protective devices.Many installers don't think about sizing generator protection...
Space limitations forced a design-build company to use a novel approach to critical load transfer without interruption. Continuous facility operation drove the use of a very detailed sequence of construction to replace existing distribution...
Not all resettable overcurrent protective devices are circuit breakers; some are supplementary protectors. So how do you know one from the other?When is a circuit breaker not a circuit breaker? No, this isn't a trick question. Not all resettable...
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, solid-state electronic relays, just like the solid-state trip unit shown at the right...
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 between the rules covering workspace sizing, and the other rules we address in this article on...
AT A GLANCE: AC power generation is no longer the exclusive domain of utilities. Many contractors and non-utility maintenance people now have responsibility for generator systems. Suppose you see fluctuations in frequency, voltage, kW, or kvar. Do...
