Published by Danaisak Tangsakha, Provincial Electricity Authority (PEA), Thailand.
Published by Panida Boonyaritdachochai, Power Quality Engineer, Power Quality (Thailand) Co., Ltd.
Published by Nat Songkram, Power Quality Section, Provincial Electricity Authority (PEA), Thailand.
Published by Thaweesak Aranchot, Electrical Engineer, Power Quality (Thailand) Co., Ltd. Plan Measure actual usage of each load for recording a consumption. Then determine a way to reduce the usage without impacting a business efficiency Investigate the actual data comparing with Electricity bill Introduction The energy consumption at PQT was studied to determine\how much energyContinue reading “Energy Usage Report for A Small Office Facility”
Published by Terry Chandler, Director of Engineer, Power Quality Inc. Power Quality study for EV charger post• Manufacturer of EV has experienced several internal battery charger failures in new EV’s• 2 sites, 1 in Arizona USA, 1 in Seoul, Korea. The plan for USA site and Korea site• Monitor the voltage quality supplyingContinue reading “Electric Vehicle Charger”
Published by Dranetz – BMI Case Studies The power system for this major NYC bank providing nationwide credit card and other financial transactions appeared to be performing satisfactorily. Fortunately, the proactive monitoring approach employed in this facility identified a power quality trend that could have caused a catastrophic failure. Non-symmetrical waveforms rich with even orderContinue reading “Bank’s High 9’s Infrastructure Saved from Disaster”
Published by Dranetz – BMI Case Studies In 2000, DHL Airways opened a new 24/7 customer service center to support its US customer base. To maximize uptime and ensure high reliability, a redundant UPS system was installed, protecting both the supply and the facility loads. Integral to the facility design was the Signature System powerContinue reading “24/7 Customer Service Center”
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”
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”
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”