Small-current grounding line selection device line-outgoing system
A technology of low-current grounding and line selection device, applied in the direction of fault location, etc., can solve the problems of different line fault troubleshooting errors, affecting the lower line troubleshooting, etc.
Inactive Publication Date: 2015-12-16
HEFEI HAICHANG ELECTRICAL TECH
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AI-Extracted Technical Summary
Problems solved by technology
A small-current grounding line selection device line-outgoing system is connected with a voltage transformer, a grounding loop and a grounding line selection device, and comprises a zero sequence current transformer input terminal, CT ends and zero sequence transformers, which are connected in sequence. The grounding line selection device is connected with a zero sequence current transformer, the voltage transformer and a contactor; by adding the CT ends and the zero sequence transformers or secondary line accessing devices to the current transformer input terminal, use needs of full cable outgoing, overhead line outgoing or mixed line outgoing are met; and when the voltage transformer detects a zero sequence voltage, the grounding loop is controlled to be connected, and then, fault lines are judged according to the current data collected by the zero sequence current transformer. The small-current grounding line selection device line-outgoing system, for line outgoing modes of different landforms, eliminates errors, realizes line fault elimination accurately and quickly, and guarantees normal work of the grounding line selection device.
- Experimental program(1)
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