rundsteueranlage exceeded 100 mg / l with an inverter as rundsteuersender exceeded 100 mg / l

摘要

Via direct-axis inductances (5R, 5S, 5T), a filter circuit (7) and current transformers (6R, 6S, 6T), an invertor (1) supplies audio-frequency rectangular-waveform pulses into a supply network. The control unit (1b) of the invertor receives audio-frequency control pulses, which are pulse-width-modulated during a starting time by clock pulses of reducing pulse width, from a remote-control unit (9) and a starting controller (8). In order to ensure perfect transmission even in the case of a transient overcurrent, a current-limiting device (100) causes the rectangular-waveform pulses to be pulse-width-modulated, in the same way as during starting, during a short action time in the event of a transit overcurrent and, in the same way as during starting, causes said rectangular-waveform pulses to be fed back continuously during a transition time into the rectangular form. In this case, the current-limiting action signal (w) is enabled only above a minimum value (U*min) of the output voltage, and limits the output voltage to the minimum value during current-limiting action. IMAGE