System for effecting tap changes of tapped transformer windings

Details System for effecting tap changes of tapped transformer windings System for effecting tap changes of tapped transformer windings

1975-05-19

1976-03-16

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

317 11E, 317 16, 307136, G05F 120, H02M 512

Patent

active

039449130

ABSTRACT:
Tap-changing means for tapped transformers include thyristors for effecting tap-changes. Additional tap-changing means which include electric fuses, current-limiting resistors and a relay-controlled standby thyristor trigger system prevent the occurrence of dangerous short-circuit currents in case of malfunction of the principal thyristor trigger means. The circuitry further includes a pair of voltage bucking relays energized by a pair of voltage sensors responsive to the voltage prevailing between the taps of the transformer winding between which a tap-changing operation is intended.

REFERENCES:
patent: 3662253 (1972-05-01), Yamamoto et al.
patent: 3706024 (1972-12-01), Wood
patent: 3728611 (1973-04-01), Elvin
patent: 3786337 (1974-01-01), Kugler

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