Doble Equips Utilities to Embrace Substation Automation with F6880 Digital Network Analyzer
May 24, 2022Easy-to-use, compact and lightweight instrument helps engineers confidently overcome the challenges of troubleshooting IEC 61850 digital substation
Doble Test Assistant 8 Delivers Greater Diagnostic Power and Instrument Support for Comprehensive Field Testing and Analysis
March 7, 2022Latest version of DTA software is now compatible with Vanguard Turns Ratio products and adds exciting current components for testing with the M7100 and M4100.
Turning the corner on cyber-secure protection testing
December 6, 2021Matters of NERC PRC and NERC CIP compliance intersect during protection system testing on substation networks. In the modern regulatory environment, the benefits of computer-based relaying are challenged by the costs of cyber security and disrupted or insufficient relay testing practices. The way forward demands interconnected data and the ability to track critical metrics automatically. Organizations can modernize while ensuring compliance readiness by implementing systems that integrate protection and cyber domains into scalable management platforms.
Is it safe?
November 16, 2021When primary station equipment trips out, it is often the substation maintenance engineers who must review the situation, get the data needed to make an informed decision, and then ‘make the call’…
Investigation and Teardown of OIP Bushings
October 15, 2021As an integral part of the electric delivery system around the world and the interface between the transformer and overhead bus, bushings failures have a significant negative impact. Because of this, there is a special focus on determining the root cause of the failure. A bushing teardown investigation is employed in cases where there is a need to determine the failure mechanism. This paper is a brief synopsis of how companies perform a bushing teardown.
Determining Cellulose Degradation in Transformers Using Indirect Tests
August 31, 2021The design life of a transformer is usually about 20 to 25 years. In the United States, estimates show the average age of a transformer is currently around 42 years, which means a number of even older units are still in service. As with all things, transformers age and degrade over time. Transformer failures can come from a variety of sources including through faults, faulty crimps and brazes, corrosive sulfur, poor design, water intrusion, collateral damage from a bushing or load tap changer (LTC) failure, incorrectly sized leads, and a host of other issues. Overall, however, the demise of a transformer from normal aging is linked directly to the condition of the solid insulation (i.e. paper, cellulose).
Condition Monitoring Realities: Dealing with the Unexpected
August 15, 2021We should have expectations when applying condition monitoring to transformers. If we know what to expect then we can identify measurements which are unexpected or anomalous and worthy of deeper investigation.
Doble Acquires High Voltage Test System Manufacturer Phenix Technologies
August 9, 2021Doble Engineering Company, a leader in power grid diagnostic solutions and subsidiary of ESCO Technologies Inc. (NYSE: ESE), today announced it has acquired the assets of Phenix Technologies, the leading manufacturer of high voltage test systems and components. The acquisition positions Doble to build out its high voltage testing and measurement equipment portfolio and further expand into the commercial and industrial sectors.
Doble Engineering Company Launches F8000 Power System Simulators
June 8, 2021Configurable next-generation hardware seamlessly blends conventional and digital test performance
ESCO Announces Acquisition of Global Utility Supplier
May 20, 2021ESCO Technologies Inc. (NYSE: ESE) today announced that it has entered into an agreement to acquire I.S.A Altanova Group S.R.L. (Altanova), a well-established, leading supplier in the field of advanced condition assessment technologies centered around partial discharge (PD) measurement and analysis, as well as test instruments for electrical apparatus (www.altanova-group.com).
Doble Simplifies Insulation System Testing of High Voltage Assets with Spark P3
April 12, 2021Universal partial discharge and electromagnetic interference analyzer removes the need for expert data interpretation with automatic signal classification, guided measurements and more
Doble Brings Condition Monitoring to More Transformers with Calisto H1
April 8, 2021New hydrogen detector samples transformer oil in real time, equipping utilities with more health information for faster, more confident decisions.
Successful application of AI techniques: A hybrid approach
November 23, 2020AI systems provide a lot of promise in the analysis and evaluation of power system data. This article shows some of the benefits of the application of AI, identifying the strengths and weaknesses of the approach, and provides a way forward to apply AI in a meaningful and controlled manner.
Oil as a Main Insulation Component in Liquid Filled Power Transformers: Quality and Consistency of Product
November 10, 2020Did you choose the correct oil for your transformer application? This is the one big question I am confronted with after reading through this outstanding article written by the three authors, Lance Lewand, Eileen Finnan, and Melissa Carmine-Zajac. All of them are highly respected in the industry. Interesting to see the long road oil analysis has come and the progress that has been made in the transformer oil industry, to ensure a high-quality product fit for a specific purpose. The criteria are set out to guide us to evaluate the insulating fluid when considering a fit candidate for lifetime optimization and reliability.
Think of a number…
November 5, 2020An asset health index (AHI) summarises a lot of disparate data into a single value in order to estimate the condition of the asset, such as a transformer. The big question is: does everyone understand what the AHI really means? Technical information used to derive an AHI is lost. At the same time, looking at the AHI value, the end-user can get a feeling that they know all they need to know, which sometimes can be misleading.