Eaton Electrical Group

PA, United States

Eaton Electrical Group

PA, United States
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McDermit D.C.,Turner Construction Company | McDermit D.C.,Microsoft | Shipp D.D.,Eaton Electrical Group | Dionise T.J.,Eaton Electrical Group | Lorch V.,Eaton Electrical Group
IEEE Transactions on Industry Applications | Year: 2013

During commissioning of a large data center, while switching medium-voltage circuit breakers without any appreciable load, several potential transformers failed catastrophically. A detailed investigation, including a computer simulation, was performed. Ferroresonance produced by switching transients associated with opening and closing the vacuum breakers was determined to be the cause. The analysis also determined that the close-coupled power transformers were also in jeopardy. Field inspections involving grounding improvements coupled with solution simulations were made. High-speed switching transient measurements were performed to verify the analysis and the surge protective device solution (arresters and snubbers). This paper walks the reader through problem recognition, simulation, field measurements, and solution implementation. Special focus will be made on the field measurement verification. © 1972-2012 IEEE.


Morello S.,ARM EnerTech Assoc. LLC | Dionise T.J.,Eaton Electrical Group | Mank T.L.,Standard Steel LLC
IEEE Transactions on Industry Applications | Year: 2015

This steel maker is upgrading the electric arc furnace (EAF) melt shop to increase production and improve metallurgical quality of their product. The increased electrical load and harmonic generation for the new furnace operation necessitated the installation of a static var compensator (SVC) to meet utility interconnect requirements. This paper describes a sequence of comprehensive analysis performed to specify the SVC including load flow analysis, flicker analysis, and harmonic analysis studies. The analysis presented in this paper sized and evaluated the proposed SVC reactive compensation to mitigate flicker, harmonics, and power factor for the new EAF and ladle melt furnace installations to comply with the utility interconnect requirements. © 1972-2012 IEEE.


Morello S.,ARM EnerTech Assoc. LLC | Dionise T.J.,Eaton Electrical Group | Mank T.L.,Standard Steel LLC
IEEE Industry Application Society - 51st Annual Meeting, IAS 2015, Conference Record | Year: 2015

This steel maker upgraded the Electric Arc Furnace (EAF) Melt Shop to increase production and improve metallurgical quality of their product. The increased electrical load and harmonic generation for the new furnace operation necessitated the installation of a 80 MVAR static var compensator (SVC) to meet utility interconnect requirements. This paper is a follow-up and companion to [1] that documented comprehensive analysis to specify the SVC. This paper describes the sequence of events during the installation, commissioning and operation of the SVC. It will assess the performance of the SVC compared to the electrical requirements of the utility for voltage regulation, flicker, harmonics and power factor. Power quality measurements during EAF operation without the SVC established a baseline to from which to show improvements provided by the SVC as well as compliance with the utility limits. Additionally, events encountered during the commissioning are shared as lessons learned. © 2015 IEEE.


Dionise T.J.,Eaton Electrical Group
Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) | Year: 2012

The advantages of a Static VAR Compensator (SVC) for electric arc furnace (EAF) and ladle melt furnace (LMF) applications are well known. The SVC minimizes the impact of the EAF and LMF on the utility as well as improves the efficiency of both furnaces. In this application, it was desirable to quantify the performance of the SVC. This paper describes power quality measurements which were taken on the electrical distribution system to evaluate the performance of the SVC. The purpose of the power quality measurements was to monitor the voltage regulation, harmonics, flicker and other power quality quantities at the 138 kV utility point-of-common-coupling (PCC) as well as the 34.5 kV system serving the SVC, EAF and LMF. The measurements and subsequent analysis established a baseline for the SVC performance and identified areas of concern. This paper describes the analysis of the measurements and evaluation of the SVC performance. © 2012 IEEE.


Dionise T.,Eaton Electrical Group | Johnston S.,Eaton Electrical Group
Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) | Year: 2013

Vacuum circuit breakers are commonly applied to the primary circuit to switch Ladle Melt Furnaces (LMF) transformers in melt shop applications which support rolling mill operations. Because of the well documented phenomenon of switching transients induced on the line of the furnace transformer due to the opening and closing of the vacuum circuit breaker (VCB), most LMFs in this application also have surge protection applied at the transformer terminals. This paper contains an analysis of one such location with two identical LMFs, each fed by a VCB where the LMF transformer terminals were equipped with primary surge protection consisting of surge arresters and RC snubbers. Recent high transient counts and increased levels of combustible gasses in oils samples raised concern and led to a field investigation, measurements, EMTP simulations, and evaluation of the surge protection of both LMFs. Power quality measurements were taken to identify the transients experienced by the surge arresters at the transformer terminals. EMTP simulations were conducted to reproduce the transients, determine a worst case switching event, and properly size the surge protection for each LMF transformer. © 2013 IEEE.


Dionise T.J.,Eaton Electrical Group | Cooper C.L.,Eaton Electrical Group
Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) | Year: 2010

In today's business world, a continuous uninterrupted process equates to more profit especially in a Data Center. Some electrical power failures at Data Centers are catastrophic, causing hours of downtime and thousands in lost profit. More and more, facility managers are realizing the importance of being proactive about identifying reliability weaknesses in the electrical distribution system through electrical system audits. An electrical system audit is the first step in assuring that a Data Center power system is operating reliably, safely and efficiently, maximizing use of capital and minimizing operating expenses. Based on experience gained in performing electrical system audits of Data Centers, the authors will share significant electrical issues that adversely affect Data Center Reliability. This paper will identify key findings, symptoms and issues and provide solutions as well industry best practices. © 2010 IEEE.


Shipp D.D.,Eaton Electrical Group | Dionise T.J.,Eaton Electrical Group | Lorch V.,Eaton Electrical Group | MacFarlane W.G.,Eaton Electrical Group
IEEE Transactions on Industry Applications | Year: 2012

Switching transients associated with circuit breakers have been observed for many years. With the widespread application of vacuum breakers for transformer switching, recently, this phenomenon has been attributed to a significant number of transformer failures. Vacuum circuit breaker switching of electric arc furnace and ladle melt furnace (LMF) transformers raises concern because of their inductive currents. High-frequency transients and overvoltages result when the vacuum breaker exhibits virtual current chop and multiple re-ignitions. This paper will present a detailed case study of vacuum breaker switching of a new LMF transformer involving current chopping and restrike simulations using the electromagnetic transients program. A technique that involves a combination of surge arresters and snubbers will be applied to the LMF to show that the switching transients can be successfully mitigated. Additionally, some practical aspects of the physical design and installation of the snubber will be discussed. © 2006 IEEE.


Shipp D.D.,Eaton Electrical Group | Dionise T.J.,Eaton Electrical Group | Lorch V.,Eaton Electrical Group | MacFarlane B.G.,Eaton Electrical Group
IEEE Transactions on Industry Applications | Year: 2011

Switching transients associated with circuit breakers have been observed for many years. Recently, this phenomenon has been attributed to a significant number of transformer failures involving primary circuit-breaker switching. These transformer failures had common contributing factors such as the following: 1) primary vacuum or SF-6 breaker; 2) short cable or bus connection to transformer; and 3) application involving dry-type or cast-coil transformers and some liquid-filled ones. This paper will review these recent transformer failures due to primary circuit-breaker switching transients to show the severity of damage caused by the voltage surge and discuss the common contributing factors. Next, switching transient simulations in the electromagnetic transients program will give case studies which illustrate how breaker characteristics of current chopping and restrike combine with critical circuit characteristics to cause transformer failure. Design and installation considerations will be addressed, particularly the challenges of retrofitting a snubber to an existing facility with limited space. Finally, several techniques and equipment that have proven to successfully mitigate the breaker switching transients will be presented, including surge arresters, surge capacitors, snubbers, and these in combination. © 2010 IEEE.


Dionise T.J.,Eaton Electrical Group | Cooper C.L.,Eaton Electrical Group
IEEE Industry Applications Magazine | Year: 2012

In todays business world, a continuous uninterrupted process equates to more profit, especially in a data center. Some electrical power failures at data centers are catastrophic, causing hours of downtime and thousands of dollars in lost profit. More and more, facility managers are realizing the importance of being proactive about identifying reliability weaknesses in an electrical distribution system through electrical system audits. © 1975-2012 IEEE.


White R.S.,Charter Steel Cleveland Charter Manufacturing Company Inc. | Dionise T.J.,Eaton Electrical Group | Baron J.A.,Power Systems Development Inc.
IEEE Transactions on Industry Applications | Year: 2010

An electric arc furnace, a ladle melt furnace, a single-tank vacuum degasser, and a four-strand continuous caster comprise this new melting and casting operation that supports a rod and bar-in-coil rolling mill. This paper describes the design, analysis, and operation of the electrical distribution system for these modern electric arc furnace and ladle melt furnace. First, the design of the electrical distribution system provided adequate capacity to support simultaneous operation of both the electric arc furnace and the ladle melt furnace in support of melt-shop operations. Next, harmonic analysis and flicker analysis of the circuit supplying the furnaces resulted in specification of a multistage filter that insured acceptable levels of harmonic distortion and voltage flicker on the utility supply as well as voltage support during all stages of arcing. Finally, operation experience gained from furnace performance during the initial startup led to subsequent fine-tuning to achieve higher levels of production. © 2006 IEEE.

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