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Lockley B.,Lockley Engineering | Lyle B.,GMR Electrical Motors Ltd. | MacDonald W.,Suncor Energy | Noonan M.,Suncor Energy | Paes R.,Rockwell Automation
IEEE Transactions on Industry Applications | Year: 2015

Because of anticipated occasional hydraulic issues in an oil sands slurry pumping application, it was expected that the existing adjustable speed drive (ASD)-driven 2500-hp motors would be overloaded at up to 3333 hp at a slightly reduced speed from time to time. Working from factory test data, estimates were made of losses and temperature rises at the expected load points. The temperature rises were verified by testing a motor on an ASD using a "back-to-back" ASD/motor arrangement in a specially set up off-site arrangement, with the base power available being an 800-kVA alternator. In the particular application, the temperature rises were not excessive, and the predicted loss of insulation life due to the higher insulation temperatures for brief times involved would not be excessive. The expected losses and temperature rises and the test setup and operation are discussed, as well as the achieved temperatures and the method of predicting loss of insulation life. © 2014 IEEE.


Lockley B.,Lockley Engineering | Chisholm M.,General Electric | Griffith T.,General Electric | D'Alleva G.,ExxonMobil | Wood B.,Chevron
IEEE Industry Applications Magazine | Year: 2010

The standard American Petroleum Institute (API) 546 third edition was written by and for users, consultants, and manufacturers to provide a common performance standard for large synchronous machines. The standard is designed as a stand-alone document listing the requirements of all aspects of a synchronous machine. When compared with earlier editions, this edition has various enhancements designed to make it easier to purchase or specify a more durable machine. It has new requirements in some areas such as excitation systems, frame vibration, and insulation tests, as well as improved sections concerning dynamic analysis and thermally induced vibration changes. To reduce the risk of confusion, it should be used with the supplied data sheets. © 2006 IEEE.


Lockley B.,Lockley Engineering | Wood B.,Chevron
IEEE Industry Applications Magazine | Year: 2013

The American Petroleum Institute (API) 541, 546, and 547 large motor and generator standards require many features that are not found in other large electric machines. These features make the machine more reliable, but they also add to the initial cost. This article compares the costs and benefits of some of the more significant features that may be specified and makes recommendations about the optional features that should be purchased for specific situations. © 1975-2012 IEEE.


Chisholm M.,General Electric | D'Alleva G.,ExxonMobil | Lockley B.,Lockley Engineering | Ocmand J.,Motiva Enterprises | And 2 more authors.
Record of Conference Papers - Annual Petroleum and Chemical Industry Conference | Year: 2012

API 541 5th edition was written by a taskforce composed of users, consultants and manufacturers to provide a common performance standard to cover the minimum requirements for form-wound squirrel-cage induction motors 375 kW (500 HP) and larger. The Standard is designed to outline the requirements of all aspects of an induction machine. When compared to earlier editions, this revision has enhancements making it easier to purchase and specify a more durable machine. This edition has new requirements in the areas of frame vibration and insulation tests; plus improved sections concerning dynamic analysis and thermal withstand capabilities. The Standard is used in conjunction with the extensively modified data sheets. © 2012 IEEE.


Murfield N.,Electrical Machinery Co. | Zettervall E.,Electrical Machinery Co. | Lockley B.,Lockley Engineering
Record of Conference Papers - Annual Petroleum and Chemical Industry Conference | Year: 2016

Arc flash protection around electrical process equipment is paramount in any industrial setting, especially in the petroleum industry. Laboratory testing of motor terminal box structural integrity and rupture panel efficacy during a fault is carried out. Simple calculations are made to validate the design and are compared to the test results. Simulation results are then compared to both test data and the simple calculations. It is shown that more robust simulation techniques are needed to accurately capture the physics of an arc flash, and make simulation a feasible tool for design. Recommendations are made for designing and testing future terminal boxes. © 2015 IEEE.

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