| 摘要 |
The present invention relates to a measuring device for checking an electrical circuit breaker. The measuring device comprises a current generating unit, which generates a measurement current for a continuity measurement of a switching contact of the circuit breaker. The measuring device furthermore comprises a measuring unit for registering a measurement signal at the circuit breaker, an energy supply unit for supplying a control drive of the circuit breaker with electrical energy, and a control unit, which has a timer. The control unit is able output to the control drive, via the control output, a signal for opening or closing the circuit breaker, and to determine a time-based switching behaviour of the circuit breaker in dependence on the measurement signal. When the circuit breaker is closed, the control unit can determine the resistance of the switching contact in dependence on the measurement current and the measurement signal. |
