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.
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[0015] The content of the present invention will be described below in conjunction with specific embodiments.
[0016] Such as figure 1 , figure 2 and image 3 As shown, the outlet system of the small current grounding line selection device is connected to the voltage transformer, the grounding loop and the grounding line selection device, including the zero-sequence current transformer input terminal 1, CT terminal 2 and zero-sequence transformer 3 connected in sequence, The grounding line selection device is connected to the zero-sequence current transformer, voltage transformer and contactor respectively, and the CT terminal 2, the zero-sequence transformer 3 or the secondary line access device 4 are installed on the input terminal of the current transformer to meet the requirements of all cables. According to the requirements of outgoing line, overhead outgoing line or mixed outgoing line, when the voltage transformer detects zero-sequence voltage, it controls the condu...
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