| 摘要 |
<p>The present invention relates to a measuring device (10) for checking an electrical circuit breaker (1). The measuring device (10) comprises a current generating unit (12), which is designed to generate a measurement current for a continuity measurement of a switching contact (5) of the circuit breaker (1). The measuring device (10) furthermore comprises a measuring unit (13) for registering a measurement signal at the circuit breaker (1), an energy supply unit (15) for supplying a control drive (6) of the circuit breaker (1) with electrical energy, and a control unit (14), which has a timer (18). The control unit (14) is able output to the control drive (6), via the control output (19), a signal for opening or closing the circuit breaker (1), and to determine a time-based switching behaviour of the circuit breaker (10) in dependence on the measurement signal. Further, the control unit (14) is designed, in the case of the circuit breaker (1) being closed, to determine the resistance of the switching contact (5) in dependence on the measurement current and the measurement signal.</p> |
