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US 8,508,890 B2Granted
Arc extinguishing hybrid transfer switch and switching method
AssigneeASCO Power Technologies, L.P.
InventorsDapeng Zheng, Frank Heerdt, Zixia Sang
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AssigneeASCO Power Technologies, L.P.
InventorsDapeng Zheng, Frank Heerdt, Zixia Sang
Estimating the term…
The present invention discloses an arc extinguishing hybrid transfer switch, including a mechanical switch and a first thyristor branch connected in parallel with the first contact branch of the mechanical switch, wherein the first thyristor branch includes a first thyristor, a second thyristor, a first polarized capacitor and a second polarized capacitor, the first thyristor and the first polarized capacitor are connected in series in the same direction, the second thyristor and the second polarized capacitor are connected in series in the same direction, and a branch consisted of the first thyristor and the first polarized capacitor and a branch consisted of the second thyristor and the second polarized capacitor are connected in parallel in reverse direction. The invention further discloses a switching method for the arc extinguishing hybrid transfer switch for implementing an arc extinguishing of a mechanical switch. In the invention, a low-power thyristor may be used, thus the cost of the switch may be lowered greatly. Moreover, the thyristor may be replaced by the polarized capacitor for implementing the arc extinguishing when a short-circuit failure occurs on the thyristor. Thus, the load current is lowered greatly and the influence of thyristor failure on the load is reduced.
An arc extinguishing hybrid transfer switch, comprising a mechanical switch and a first thyristor branch connected in parallel with a first contact branch of the mechanical switch, wherein, the first thyristor branch comprises a first thyristor, a second thyristor, a first polarized capacitor and a second polarized capacitor, the first thyristor and the first polarized capacitor are connected in series in the same direction, the second thyristor and the second polarized capacitor are connected in series in the same direction, and a branch consisted of the first thyristor and the first polarized capacitor and a branch consisted of the second thyristor and the second polarized capacitor are connected in parallel in reverse direction,
A switching method for an arc extinguishing hybrid transfer switch, the arc extinguishing hybrid transfer switch comprising a mechanical switch and a first thyristor branch connected in parallel with a first contact branch of the mechanical switch, wherein, the first thyristor branch comprises a first thyristor, a second thyristor, a first polarized capacitor and a second polarized capacitor, the first thyristor and the first polarized capacitor are connected in series in the same direction, the second thyristor and the second polarized capacitor are connected in series in the same direction, and a branch consisted of the first thyristor and the first polarized capacitor and a branch consisted of the second thyristor and the second polarized capacitor are connected in parallel in reverse direction, the arc extinguishing hybrid transfer switch further comprising:
Dependencies are inferred from the claim text.