PQSynergy™ is an international forum to share experiences, requirements, questions, information, customer requirements, problems and solutions in the fast growth area of quality of supply requirements of sensitive loads, energy conservation and management and power quality monitoring and solutions. For more information, you can visit the website: www.pqsynergy.com View and download papers: PQSynergy™ Papers Publishers AdvancedContinue reading “PQSynergy™ Papers 2012”
Author Archives: PQBlog
Loose Bus Bar Bolts Cause Sags
Published by Dranetz – BMI Case Studies An administration building in a government complex in New Jersey had a transformer with a 4KV primary, 120/208V wye, 800A secondary. The buss duct ran up to a second-floor panel, which supplied an office area. Computer misoperations and lights flickering were occurring randomly for nearly two years. EmergencyContinue reading “Loose Bus Bar Bolts Cause Sags”
PQSIM 200™
A Power Practitioner™ Training Tool “A dedicated AC generator that produces voltage and current waveforms of the most common Power Quality disturbances” PQSIM 200™ was designed by Power Quality Experts with 30 years’ experience testing and documenting Power Quality. The PQSIM 200™ provides the user with the capability to select PQ events and their magnitudeContinue reading “PQSIM 200™”
Textile Industry Evaluation
Published by Dranetz – BMI Case Studies Despite their differences, continuous-process industries share underlying characteristics: they maintain continuous operations in facilities that represent substantial start-up costs and time but can be interrupted or disrupted by seemingly minor fluctuations in power quality. If the product stream is disrupted, lost productivity and lost product can create aContinue reading “Textile Industry Evaluation”
Thumping Sounds in the Closet
Published by Dranetz – BMI Case Studies Elevator control panels for the lower zone mid-rise elevators were on the nineteenth floor of a forty-story office building in a large midwestern city. It was fed with 480V transformer on the same floor, with the feeders to the controls rated at 800A. Excessive noise and vibration ofContinue reading “Thumping Sounds in the Closet”
Power Monitoring Products PQ3K & PQ5K
The PQ3K and PQ5K are cost effective meters that combine general purpose PQ detection (with waveform recording) and full 4 quadrant energy monitoring in one instrument. Wide-ranging applications include utility, facility, manufacturing, petrochemical, mission critical and more. The PQ3K is housed in a 144mm x 144mm panel mounted enclosure that includes a high-resolution color TFT display. The PQ5K isContinue reading “Power Monitoring Products PQ3K & PQ5K”
The Case of the Missing Contact
Published by Dranetz – BMI Case Studies Executive SummaryDefiance Metal Products Company contracted with Electrotek Concepts to perform field measurements of their welding operations, and to make recommendations for remediation of Power Quality problems at the facility. The customer has been experiencing both major and minor electrical problems. The minor problems include occasional observable flickerContinue reading “The Case of the Missing Contact”
Computer on Shared Branch Circuit
Published by Dranetz – BMI Case Studies Engineering laboratory adjacent to offices. A computer system used by laboratory personnel exhibited intermittent failures and data errors. Typically, these would start around 10 a.m. On some days there were no failures. A power monitor was installed at the panelboard serving the computer system. The monitor was connected,Continue reading “Computer on Shared Branch Circuit”
Manufacturing Process Unexpectedly Halted
Published by Dranetz – BMI Case Studies This medium-sized manufacturing facility, located in an industrial park that experienced an unexplained shutdown of several adjustable speed drives (ASDs) , wreaking havoc on key process equipment. Each day, at approximately 6 am, the utility-owned PF capacitor kicks on to improve the voltage of inductive loads prevalent inContinue reading “Manufacturing Process Unexpectedly Halted”
Utility Power Factor Capacitor Bank Switch Problem
Published by Dranetz – BMI Case Studies A medical clinic in Las Vegas, Nevada, employing sensitive computed tomography (CT Scan) system. Power was brought to the system from a 480 volt service feeding a 480-to-208 volt isolation transformer. CT Scan system was experiencing repeated computer lockups and component failures. The medical equipment service company installedContinue reading “Utility Power Factor Capacitor Bank Switch Problem”
Power Quality Blog 