| 摘要 |
1527963 Overcurrent protection apparatus SIEMENS AG 14 March 1977 [12 March 1976] 10635/77 Heading H2K An overcurrent protection apparatus comprises current transformer(s) 1, 2, 3 for providing an input signal, an adjustable gain input circuit 4-29 for receiving the input signal and selecting different limit values for the input signal, the input circuit providing a standardized output signal having the same value when the input signal is equal to each selected limit value a measuring instrument 55-57 for receiving and indicating the value of the standardized signal, an instant response trip arrangement 30-36, and a delayed response trip arrangement 40-51 responsive to the standardized signal. |
