Proposed Transient Recovery Voltage Ratings for Power Circuit Breakers

Representative unmodified transient recovery voltages (TRVs) of power systems have been selected to derive the recovery voltage ratings for power circuit breakers. Mathematical expressions have been derived that combine fundamental system parameters such as load current, line impedancee, voltage regulation, and transformer reactance, together with the rated voltage and circuit interrupting capabilities of the breaker, to describe the TRV withstand requirements for power circuit breakers. Two points in a volt-time plane are developed to describe the TRV withstand requirements of power breakers, and numerical values are listed for these proposed rating values. The TRV ratings for fault currents less than rated currents and for kilometric short line faults are also developed. Since the expressions developed describe system recovery voltages, they may also be used to calculate the TRV of actual power systems.

[1]  Otto Naef,et al.  Field Tests on a 138-Kv High-Speed Oil Circuit Breaker at Philip Sporn Power Plant [includes discussion] , 1955, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[2]  A. C. Monteith,et al.  System recovery voltage determination by analytical and A-C calculating board methods , 1937, Electrical Engineering.

[3]  E. W. Boehne,et al.  EHV Surge Suppression on Interrupting Light Currents with Air Switches I-Capacitive Currents , 1965 .

[4]  E. W. Boehne,et al.  The Switching Severity of Industrial Circuits -I , 1963 .

[5]  Allan N. Greenwood,et al.  Generalized Damping Curves and Their Use in Solving Power-Switching Transients , 1963 .

[6]  A. K. Falk,et al.  Determination of Transient Recovery Voltages on the Detroit Edison System , 1960, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[7]  E. W. Boehne,et al.  The Determination of Circuit Recovery Rates , 1935, Transactions of the American Institute of Electrical Engineers.

[8]  W. F. Skeats,et al.  System Recovery Voltage and Short-Circuit Duty for High-Voltage Circuit Breakers [includes discussion] , 1953, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[9]  Per F. Hammarlund.  Transient recovery voltage : subsequent to short-circuit interruption with special reference to Swedish power systems , 1946 .

[10]  A. J. McElroy,et al.  Digital Computer Calculation of Transients in Electric Networks , 1963 .

[11]  R. B. Shores,et al.  A 2-Cycle 138-Kv 10,000,000-Kva Air-Blast Circuit Breaker Design Considerations and Field Tests at Philip Sporn Station , 1962, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[12]  W. R. Wilson,et al.  Field Tests on a 345-Kv High-Capacity Oil Circuit Breaker at Philip Sporn Power Plant , 1959, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[13]  L. O. Barthold,et al.  Digital Traveling-Wave Solutions I-Single-Phase Equivalents , 1961, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[14]  R. C. Van Sickle,et al.  Arc Extinction Phenomena in High Voltage Circuit Breakers-Studied With a Cathode Ray Oscillograph , 1933, Transactions of the American Institute of Electrical Engineers.

[15]  W. R. Wilson,et al.  Severe Rates of Rise of Recovery Voltage Associated with Transmission Line Short Circuits , 1957, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[16]  D. M. Sauter,et al.  Transient Recovery Voltages on Power Systems Part II - Practical Methods of Determination , 1958, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[17]  W. C. Kotheimer.  A Method for Studying Circuit Transient Recovery Voltage Characteristics of Electric Power Systems [includes discussion] , 1955, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.