Ieee Std c37.101-1993 by IEEE

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7, pp. 257-264, 1971. [B11] Warrington, A. R. , Protective Relays, Their Theory and Practice, vol. 1. , p. 181, 1968. , “The Protection of Large Power Station Generating Units,” Siemens Review, Feb. 1965. 3 Generator ground fault protection [B13] AIEE Committee Report, “Present Day Grounding Practices on Power Systems,” AIEE Transactions on Power Apparatus and Systems, vol. 66, pp. 1525-1548, 1947. , Kripsky, A. , “Protection of Large Alternators Connected to Step-Up Transformers Against the Consequences of Earth Faults in the Stator Winding,” CIGRE, 34-02, 1972.

5 A pickup. 9% of the winding will be protected. Since a voltage may exist at the generator neutral when a fault occurs on the high-voltage side of the generator stepup transformer, some time delay should be provided for the time overcurrent unit. Otherwise, the machine will be incorrectly tripped for a transmission system fault. 0 will usually prove to be adequate if a very inverse relay is used. 5 Relay—vt fuse coordination The sensitive relaying used to detect phase-to-ground faults on the generator stator winding will also detect phase-toground faults on the secondary leads of the voltage transformers if the voltage transformers are connected wye-wye with both neutrals grounded.

Zero-Sequence Versus Residual Ground-Fault Protection,” Power, vol. 115, no. 10, p. 97, Oct. 1971. [B2] Johnson, A. A, “Grounding Principles and Practices,” Electrical Engineer, vol. 64, pp. 92-99, Mar. 1945. [B3] Peterson, H. A, Transients in Power Systems. New York: Wiley, 1951. [B4] Peterson, H. , “Critical Analysis of Rotating Machine Grounding Practice,” General Electric Review, April 1942. [B5] Waters, M. and Willheim, R. Neutral Grounding in High-Voltage Transmission, Part 2. New York: Elsevier Publishing Co, pp.

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