Reliance Electric

B. H. Daugherty, Ph.D., Consulting Engineer, Research Center, Reliance Electric Company Member, Institute of Electrical and Electronics Engineers (Section 29, Process Macliinery Drives)... 

Figure 14-2A. Alternating current (AC) induction motor cross-sectional view of 220/440V, 3-phase, 60-cycle, totally enclosed fan-cooled standard motor. (Used by permission Reliance Electric Co., Div. Rockwell Automation.)...

Motor/Price Selector, Reliance Electric Company, Bulletin B-l 11, Industrial Drives Group, Cleveland, Ohio. 

FIG. 29-4 Examples of open dripproof, totally enclosed fan-cooled, and weather-protected motor enclosures. Photo courtesy of Reliance Electric Company, Cleveland, Ohio.)... 

FIG. 29-73 Main characteristics of typical electric adjustable-speed drives. Source Reliance Electric Co.)... 

Exxon, Arco, Amoco, Mobil, and Ashland also entered the mining of copper and other industrial minerals. For Mobil and Exxon, the latter included uranium. By 1993, however, these units had been spun off. A few firms strayed even further afield. Exxon and Arco undertook the production of computer products and provided computer services. Exxon even went so far as to acquire an innovative electric-motor enterprise. Reliance Electric. As mentioned above, Mobil purchased Montgomery Ward and the Container Corporation of America, while Occidental bought Iowa Beef, the nation s most successful meat packer. By the mid-1990s, however, the petroleum companies had sold off nearly all these acquisitions. By then, nearly all American industrial corporations had learned that such unrelated diversification could rarely remain profitable for more than a decade and defined their strategic boundaries accordingly. 

The work reported on in this paper was supported by Reliance Electric Corapany. The author expresses his appreciation to the organization for their support and permission to publish this paper. The helpful suggestions and efforts of Oscar Pinkus and Dave Hosterman of MTI are appreciated. 

The authors wish to express their appreciation to MTI for its support in the presentation of this paper. Acknowledgment is also due to Reliance Electric Company, whose facilities were used to conduct Che experiment described herein, and to Nr. Paul Gorski for his support and interest in this project. 

It is worth mentioning that the experiments were conducted using a 2 hp Reliance Electric motor, and acceleration data was measured at locations both near to and remote from the motor bearings. Faults ranging from 0.007 inches in diameter to 0.021 inches in diameter have been considered and 720 vibration data were recorded for four different operational conditions represented by motor loads from 0 to 3 horsepower (motor speeds of 1797 to 1720 RPM). More details can be found in (CWRU). 

Fig. 8-4. 6000-gpm top-maintenance pump for circulating solutions through a 50-M v reactor, being built by Reliance Electric Company. 

Reliance Electric Compan3r Cleveland, OH USA Emissions Air Emissions... 

FIG. E-1 Speed-torque curves for a 5-hp motor, NEMA design A and D, and full-load efficiencies. (Source Reliance Electric.)... 

FIG. E-6 Electrical power vector diagram. (Source Reliance Electric.)... 

Source Reliance Electric test (model referenced is Duty Master XT). Adapted with permission. 

Source Adapted from extracts from Melfi and Hart, Considerations ftjr the Use of A-C Induction Motors on Variable Frequency Controllers in High Perftmnance Applications, Reliance Electric, USA. 

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