Convertor connection with asymmetry indicating means

Details Convertor connection with asymmetry indicating means Convertor connection with asymmetry indicating means

1974-12-12

1976-07-06

Pellinen, A. D.

317 36TD, 317 49, H02H 710

Patent

active

039684180

ABSTRACT:
A convertor connection for connection to a DC circuit includes current sensing members for forming a quantity corresponding to the direct current of the convertor connection. An indicating arrangement is provided for indicating asymmetrical operating conditions, which includes a first band pass filter connecting to the current sensing members which let through frequencies in a frequency band located between zero and the fundamental frequency of the AC component during undisturbed operation. When the output signal of the first filter exceeds a predetermined value, through a second filter an asymmetry indicating signal is emitted. The release of an output signal is prevented by a delay arrangement if the duration of the asymmetrical operating condition is less than a predetermined time.

REFERENCES:
patent: 3327170 (1967-06-01), Sonnemann
patent: 3764885 (1973-10-01), Buxbaum et al.
patent: 3805141 (1974-04-01), Pompa et al.
patent: 3876922 (1975-04-01), Forstbauer

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