| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic circuit breaker capable of detecting the voltage, without using a transformer employing a plurality of windings.SOLUTION: An electronic circuit breaker includes contacts 15r-15t for switching the current of an electrical path, current detectors 16r-16t for detecting the current of the electrical path, voltage detectors 17r-17t for detecting the voltage of the electrical path, an A/D conversion unit 23 for converting the currents detected by the current detectors and the voltages detected by the voltage detectors into digital signals, and an arithmetic processing unit 24 for calculating the measurement data including the digital power value based on the digital signals converted by the A/D conversion unit, and instructing a trip device to switch the contacts by using the arithmetic results. The voltage detectors have conductive electrodes 72 arranged on a conductor 61 connected with the electrical path via an insulator 71, and measures the voltage of the electrical path by this conductive electrodes 72 via the coupling capacitance.SELECTED DRAWING: Figure 1 |
