00539nam a22001697a 4500 230613b |||||||| |||| 00| 0 eng d 81-224-0594-0 National Science Library National Science Library 621.316 N4 Singh, L P 11549 Digital protection: Protective relaying from electromechanical to microprocessor New Delhi: Wiley Eastern Ltd, 1994 xi, 231p. Digital protection Polyphase relays udc BK 42639 42639 0 0 udc 0 621316_N4 0 63469 NSL NSL GF/Rk-12/C-22/R-2 1994-07-26 0 621.316 N4 175007 2023-06-13 00:00:00 1994-07-26 BK