TRANSFORMER PROTECTION SYSTEM USING DIRECT CURRENT SWITCH CIRCUIT
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United States of America
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Issued Date -
Mar 13, 2025
app pub date -
Sep 12, 2024
filing date -
Sep 12, 2024
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status (Latency Note)
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Abstract
A protection circuit may be electrically connected to a transformer neutral of a power grid transformer. The protection circuit may include a direct current (DC) blocking component electrically connected between the transformer neutral and a ground connection, as well as a direct current switch assembly positioned in parallel with the direct current blocking component between the transformer neutral and the ground connection. The direct current switch assembly includes at least one direct current switch having a switching element that is electrically controllable between a closed position and an open position. In some examples, a conductive housing encloses one or more switching elements. The conductive housing is electrically isolated from the ground connection. In further examples, one or more direct current switches may be electrically connected in series to provide greater voltage withstand and safety due to operational redundancy.
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