Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1998-12-22
2000-12-26
Ballato, Josie
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307116, H01H 3700
Patent
active
061664561
ABSTRACT:
The invention specifies a disconnector for decoupling a load from a supplying AC voltage network. The disconnector comprises at least one disconnector stage having a series circuit comprising at least two reverse-conducting gate turn-off thyristors which are connected cathode to cathode. The gate turn-off thyristors are preferably hard driven. This allows the use of a single circuit capacitor in parallel with the series-connected gate turn-off thyristors. This embodiment has the advantage that, during disconnection, the current commutates early from the gate turn-off thyristors, which means that the disconnection capacity can be increased.
REFERENCES:
patent: 5517378 (1996-05-01), Asplund et al.
patent: 5602462 (1997-02-01), Stich et al.
GE SCR Manual Third Edition pp. 53, 105 and 106, Jan. 1980.
Asea Brown Boveri AG
Ballato Josie
DeBeradinis Robert L.
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