Method for switching in a three-phase high voltage circuit

Details Method for switching in a three-phase high voltage circuit Method for switching in a three-phase high voltage circuit

1982-03-11

1986-12-09

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 5, 361 6, 361 7, 307127, H02H 3033

Patent

active

046283935

ABSTRACT:
A method for interrupting an inductive load in a three-phase, high voltage network by means of a switch having a quick dielectric recovery, in particular a vacuum switch, in which two of the three vacuum switches, having a quick dielectric recovery, open at least 1/3 of a cycle of the network frequency later than the first vacuum switch, augmented with the minimum arcing time in the first vacuum switch, in order to prevent high over-voltages, caused by virtual chopping.

REFERENCES:
patent: 2882372 (1959-04-01), Preissler
patent: 3402324 (1968-09-01), Kesselring et al.
patent: 3555354 (1974-01-01), Kotos
patent: 3753044 (1973-08-01), Hawker et al.

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