| 摘要 |
Electric device comprising at least one low-pressure mercury vapour discharge tube (45), which device is intended to be connected to an a.c. voltage source the frequency of which is 50 to 60 Hz. …<??>According to the invention, the discharge tube (45) is of a type which produces a comparatively large current distortion and has a proportionally low required reignition voltage. The electric device has only small electric losses. Furthermore, the discharge tube (45) remains operative even at small deviations of the nominal mains voltage. |
