General Reference – Approach to Systems Monitoring

Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Approach to Systems Monitoring, Document ID: PQS0310, Date: April 16, 2003. Abstract: Power quality monitoring is an essential service many utilities perform for their industrial and other key commercial customers. Because of the technology and software now available, this monitoring is highly effective. Not onlyContinue reading “General Reference – Approach to Systems Monitoring”

Voltage Sags and Their Impact on Industrial Customers

Published by Electrotek Concepts, Inc., PQSoft Case Study: Voltage Sags and Their Impact on Industrial Customers, Document ID: PQS0509, Date: September 30, 2005. Abstract: This case study describes the impact of voltage sags on a utility and one industrial customer. Several utility measures are presented to minimize the customer’s exposure to voltage sags. However, these measuresContinue reading “Voltage Sags and Their Impact on Industrial Customers”

Distribution Substation Voltage Variation Measurement Data Evaluation

Published by Electrotek Concepts, Inc., PQSoft Case Study: Distribution Substation Voltage Variation Measurement Data Evaluation, Document ID: PQS1007, Date: October 15, 2009. Abstract: This case study presents a voltage variation data analysis for a 12.47 kV substation monitoring location for a three-month period. The analysis included trends of the rms voltage and unbalance and statistical analysisContinue reading “Distribution Substation Voltage Variation Measurement Data Evaluation”

ITI (CBEMA) Curve Application Note

Published by Information Technology Industry Council (ITI), 1250 Eye Street NW Suite 200, Washington DC 20005, 202-737-8888, The ITI (CBEMA) Curve, included within this Application Note, is published by Technical Committee 3 (TC3) of the Information Technology Industry Council (ITI, formerly known as the Computer & Business Equipment Manufacturers Association). It is available atContinue reading “ITI (CBEMA) Curve Application Note”

Power Quality Problems and New Solutions

Published by A. de Almeida, L. Moreira, J. Delgado, ISR – Department of Electrical and Computer Engineering, University of Coimbra, Pólo II, 3030-290 Coimbra (Portugal), Phone: +351 239 796 218, fax: +351 239 406 672, E-mail:,, Abstract: In this paper, the main Power Quality (PQ) problems are presented with their associated causesContinue reading “Power Quality Problems and New Solutions”

Some Comments on Power Acceptability Curves

Published by G. Heydt , Arizona State University Tempe, Arizona USA R. Thallam, Salt River Project Phoenix, Arizona USA M. Albu, Universitatea Politehnica Bucureşti Bucharest, Romania CARIBBEAN COLLOQUIUM ON POWER QUALITY (CCPQ), JUNE 2003 Abstract Power acceptability curves, also known as voltage vulnerability or sensitivity curves, have been used for over 30 years to characterizeContinue reading “Some Comments on Power Acceptability Curves”