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US 9,099,268 B2Granted
Bypass switch assembly
AssigneeABB Technology AG
InventorsÅke Öberg, Filippo Chimento, Jian Qin, Liwei Wang, Ola Jeppsson
Life of this patent
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Abstract
A mechanical switch in the form of a bypass switch assembly is arranged between two electrical conductors (busbars) and stays open during normal operation. When a cell fault happens, the fault and bypass information is transmitted to an actuator (acting as a trigger circuit) which activates inter alia a gas generator producing huge volume of gas in a very short time. The gas pressure pushes a movable member to bridge the two electrical conductors with ultrafast speed.
Claims20
A bypass switch assembly for a semiconductor module, comprising
- a housing, the housing comprising
- a first electrical conductor;
- a second electrical conductor;
- and
- a chamber;
- wherein said chamber is filled with a gas from a group of CO2, SF6, N2, H2 and air,
- an electrical insulator formed by said gas;
- a movable member placed in said chamber and movable between a first position and a second position, wherein the member in the first position is in electrical contact with at most one of said first electrical conductor and said second electrical conductor, and wherein the movable member in the second position is in electrical contact with both said first electrical conductor and said second electrical conductor;
- the bypass switch assembly further comprising
- an actuator arranged to move said movable member from said first position to said second position, thereby causing said movable member to bypass said electrical insulator;
- and
- gas relief means in the form of a pressure relief valve arranged to release gas from said chamber upon movement of said movable member
- detection means for detecting electrical failure, said detecting means activating the gas relief means synchronised with triggering said actuator upon detection of the electrical failure.
10 more elements
Dependencies are inferred from the claim text.