架空线路故障分类（Fault classification of overhead lines）.docVIP

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架空线路故障分类（Fault classification of overhead lines）.doc

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架空线路故障分类（Fault classification of overhead lines）

架空线路故障分类（Fault classification of overhead lines） Fault classification (1) short circuit fault: one is the transient short circuit fault (usually circuit breaker reclosing successful); two is the line permanent short circuit fault (usually circuit breaker reclosing is not successful). Common faults are: short circuit fault of metal line; wire lead jumper wire breakage; arc short circuit fault; drop fuse; isolating switch; arc short circuit fault; small animal short-circuit fault; lightning flashover; short-circuit fault. (2) ground fault: transient earthing fault of line; permanent earthing fault of line. 2 causes of failure (1) short circuit fault of metal line: When the external force breaks down, the equipment or transformer on the overhead line or rod is short circuited or short circuited by external forces, or the outer part is scraped and short circuited; the automobile hitting rod causes the falling rod and the broken line; the typhoon and the flood cause the falling rod and the broken line; Fault caused by line fault, too big arc sag, the electric force caused by collision or short circuit caused by typhoon cause touch line. (2) line lead wire jumper, broken line, arc short circuit fault: Line aging, lack of strength lead to broken line; line overload, contact bad, cause jumper wire clamp burn broken. (3) there is a short circuit fault in the drop fuse and disconnector: The fuse of fuse of drop type fuse causes fuse arc explosion or arc pulling caused by phase arc short circuit; The aging or overload of the line leads to the damage of the disconnecting switch clamp, and the arcing and arcing causes the interphase short circuit. (4) short circuiting of small animals: On the pier type distribution transformer, the bare fuse is used in the high voltage lead wire of the drop fuse to the transformer, and the transformer high voltage terminal post and the high-voltage lightning arrester are not equipped with an insulation shield; On the high voltage distribution ca