VACUUM LOAD-BREAK SWITCH Russian patent published in 2014 - IPC H01H33/666 

FIELD: electricity.

SUBSTANCE: invention relates to high-voltage instrument-making industry. The vacuum load-break switch contains: frame, with installed insulators, double-loop contact system, made as a circuit of main contacts and shunting circuit of arcing contacts; vacuum arc quench chamber; and lever shaft with a drive. According to the given invention the second additional break as a wedge device including a wedge segment, installed on nc contact, and splitting mechanism, is entered into a shunting circuit of arcing contacts. While the splitting mechanism has a retainer, rigidly connected with fixed arcing contact, and double-arm lever, pivotally connected with the named retainer and effecting the mobile arcing contact.

EFFECT: improvement of reliability of closing and opening of contacts, lowering of radial loads on a stem of the vacuum arc quench chamber and smoothening of requirements to the level of external isolation of the vacuum arc quench chamber, that allows to minimise its dimensions.

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