Many facilities have rooftop exhaust fans that require service sometimes at the most inconvenient time Before service work can be initiated the NFPA 70E Standard for Electrical Safety in the Workplace requires the establishment of an electrically Learn more

The use of variable-frequency drives (VFDs) to control ac motors has increased dramatically in recent years In addition to their low operating cost and high performance they save energy Today the challenge facing system designers and engineers Learn more

About the Technology: Electronic Adjustable Speed Drives (ASDs) are devices that can greatly improve the efficiency of ac motors in applications with highly variable loads ASDs also known as variable speed drives and variable frequency drives save Learn more

IntroductionThe concept of carrying out a reliability-centered maintenance (RCM) analysis on new assets is certainly not new The airline industry where the RCM process was first developed has been using this process for years to develop Learn more