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AssigneeABB Power T&D Company Inc.
InventorsEdward L. Boyd, E. R. Eley, Jeewan L. Puri
Estimating the term…
A system and device are disclosed for protecting the primary windings of a distribution transformer from surge current which exceed a predetermined level including a tank for accommodating the distribution transformer, a first expanding arc gap extending between a first terminal and a second terminal on the secondary side of the distribution transformer, and a second expanding arc gap extending between a third terminal and the second terminal on the secondary side of the distribution transformer. The arc gap being mounted within the gas space of the tank which accommodates the distribution transformer such that a surge current which exceeds the predetermined level is directed through the arc gaps and dissipated by the expanding arc gaps thereby bypassing the secondary windings in order to protect the primary windings of the distribution transformer. The internally mounted arc gaps being effective when applied to either interlaced or non-interlaced distribution transformers.
A system for protecting the primary windings of a distribution transformer from surge currents which exceed a predetermined level, said system comprising:
A distribution transformer enclosed within a distribution transformer tank having a gas space enclosed therein, comprising:
The distribution transformer as defined in claim 17, wherein a predetermined space is provided between said arcing pins and said arcing plate.
The distribution transformer as defined in claim 18, wherein said arching plate includes at least one arcing horn extending from said predetermined space between said arcing pins and said arcing plate.
The distribution transformer as defined in claim 19, wherein said supporting structure includes at least one conductive means extending from said predetermined space such that said arcing horn and said conductive means diverge from one another away from said predetermined space.
Dependencies are inferred from the claim text.