A power play with hotel elevators In hospitality and gaming facilities, elevators are a vital system—a system that relies on power quality. Generally, the height of these facilities makes the use of stairs an alternative for only a few patrons.
A true story of the not-so-well grounded The first part of power qualityis monitoring what is happening and determining why; the second part is finding a solution that eliminates the problem and doesn’t create a new one. Sometimes, the first part can be done even without a power quality monitor.
Inadequate investment in the power grid transmission network remains the Achilles’ heel of the nation’s electric system, according to an engineer who specializes in utility policy at the University of Illinois (UI).
Many of the 5th generation power quality monitors can continuously calculate several thousand parameters (more than most users know what to do with or really need). Another parameter has been added—rapid-voltage change—that also can describe what happens when the lights blink.
When setting out to monitor any power system, it is very important to determine what type of wiring configuration is used before making the connections. The primary and secondary sides of transformers are often different wiring configurations, as can be the loads from the source.
Since the first power quality monitor was introduced by Dranetz Engineering Laboratories in 1975, there have been a lot of changes in the instruments that monitor electric distribution systems and the loads powered from the distribution systems within a facility or substation.
A new breed of technician continues to emerge from the electrical contracting ranks with an eye on maintenance and power quality (PQ). Of course, there have always been power quality specialists, but the discipline continues to evolve.
Power and power quality is something we are all acutely aware of. Whether it is because of outages due to natural disasters or unexplained utility blackouts, everyone knows power is something difficult to live without.
Reading through some electrical engineering textbooks written in the 1930s, the term “frequency” is used to describe what is now referred to as the “fundamental electric power frequency,” also known as 60 Hertz (Hz) in North America and some other parts of the world.
At a recent National Electrical Code taskforce meeting dealing with mission-critical facilities relative to scenarios proposed by the Department of Homeland Security, the main concern seemed to be “you can’t test critical facilities.