Results 271 to 280 of about 30,341 (295)
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Switchgear. A review of progress
Proceedings of the IEE Part A: Power Engineering, 1956In British switchgear, development during the period under review has been directed mainly towards the improvement of interrupting performance, measured by reliability and speed of interruption of short-circuits, and by the prevention of over-voltages when disconnecting open-ended lines or small reactive currents.
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Maintenance of vacuum switchgear
1994This is a short chapter for the good reason that, in truth, modern vacuum switchgear requires very little maintenance. There has been quite a change of attitude regarding maintenance in the last ten years. In 1982 manufacturers were recommending that maintenance be performed '... at least every 1,000 to 2,000 operations, or once a year, whichever comes
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1997
This chapter is concerned with the more technically complex switchgear control systems as applied to common substation configurations. General aspects of control systems are discusssed in Chapter 12. Note that the term 'control' refers to systems which are concerned with the operation of switchgear, as opposed to 'protection' systems which are ...
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This chapter is concerned with the more technically complex switchgear control systems as applied to common substation configurations. General aspects of control systems are discusssed in Chapter 12. Note that the term 'control' refers to systems which are concerned with the operation of switchgear, as opposed to 'protection' systems which are ...
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1994
A piece of switchgear, be it a circuit breaker, recloser, load-breaks switch or contactor has a certain rating with respect to voltage and current. It is built to conform with particular standards as explained in Section 10.2 where standards are discussed. It is the manufacturer's business to see that the product meets its rating by performing tests in
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A piece of switchgear, be it a circuit breaker, recloser, load-breaks switch or contactor has a certain rating with respect to voltage and current. It is built to conform with particular standards as explained in Section 10.2 where standards are discussed. It is the manufacturer's business to see that the product meets its rating by performing tests in
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Control voltages for power switchgear
IEEE Transactions on Power Apparatus and Systems, 1977Standards for control voltages for closing and tripping power circuit breakers were established by the National Electric Manufacturers Association (NEMA) and the American Standards Association (now the American National Standards Institute) many years ago.
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Discussion on “Switchgear standardization”
Journal of the Institution of Electrical Engineers, 1918C.H. Wordingham +27 more
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Partial discharge localization using time reversal: Application to gas insulated switchgear
Electric power systems research, 2022J. Zohrevand +3 more
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Switchgear design, development and service
2001This chapter describes the design, development and operation of SF6 switchgear [1-16]. It also describes how the development of generation and transmission has influenced switchgear evolution (see Appendices A and B). Factors that have contributed to the simplicity of design and increased the reliability of SF6 switchgear are addressed and the ...
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