| 摘要 |
PURPOSE:To effectively prevent the erroneous operation of a leakage breaker with an inexpensive construction by connecting capacitors between DC lines at the output side of a converter and a ground. CONSTITUTION:Capacitors 9a and 9b are respectively connected between a positive polarity DC line 10a and a negative polarity DC line 10b for supplying the output of a converter 1 to a smoothing condenser 2 and an inverter 3. A high frequency leakage current is supplied from capacitors 9a, 9b provided between the DC lines 10a, 10b and a ground 7, and a high frequency leakage current flowed to 3-phase AC power source lines R, S, T is reduced to prevent a leakage breaker 6 from erroneously operating. |
