A method of digital sampling of a current or group of currents in an electrical system including using in the sampling, sufficient bandwidth to reconstruct the amplitude and phase of a synthesized power frequency and its harmonics and a fundamental carrier frequency of switching electronics and modulation sidebands.
G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
H02H 3/46 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to frequency deviations
H02H 3/50 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to the appearance of abnormal wave forms, e.g. AC in DC installations
2.
METHOD FOR DETECTION OF LEAKAGE OR FAULT CURRENTS FROM EQUIPMENT IN AN ELECTRICAL POWER SYSTEM
A method of digital sampling of a current or group of currents in an electrical system including using in said sampling, sufficient bandwidth to reconstruct the amplitude and phase of a synthesised power frequency and its harmonics and a fundamental carrier frequency of switching electronics and modulation sidebands.
A method of digital sampling of a current or group of currents in an electrical system including using in said sampling, sufficient bandwidth to reconstruct the amplitude and phase of a synthesised power frequency and its harmonics and a fundamental carrier frequency of switching electronics and modulation sidebands.
G01R 19/257 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with comparison of different reference values with the value of voltage or current, e.g. using step-by-step method
G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
patents
