Overhead External Signal-Type / Transient Characteristic-Type Remote Fault Indicator JYW/Z-HD
Currently, most distribution networks employ small-current grounding systems. When a single-phase ground fault occurs in such systems, the fault current is low and the fault characteristics are complex, making line selection and fault location for single-phase ground faults a persistent technical challenge in distribution network operation. Accurately identifying the grounded line and pinpointing the faulted section while maintaining continuous power supply remains a critical issue. The signal source detection method (asymmetric current) for detecting single-ground faults operates on the principle of leveraging the unique characteristics of single-phase ground faults in small-current grounding systems—specifically, by analyzing the distinctive features of asymmetric current signals generated on the faulted line to achieve both line selection and fault location.
Overhead Transient Recording Remote Fault Indicator JYL
The distribution network fault location system is a simple and practical distribution automation solution. The waveform recording–based fault location system consists of a master station backend, data acquisition units, aggregation units, supporting communication terminals, and a public communication network. It is suitable for online monitoring of overhead lines ranging from 3 to 35 kV, offering functions such as line fault aggregation and proactive reporting of fault information to the master station. It features ease of use, stable operation, convenient maintenance, high reliability, excellent openness, and cost-effectiveness.
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