The wiring configuration of the trunk power supply system used in industrial and mining enterprises, which provides power from both ends, is illustrated in Figures 1-7. This method requires lower initial investment, making it an attractive option for certain applications. However, it has limitations in terms of automation adaptability and operational complexity. It is typically suitable for secondary load requirements. When a tie line is available on the low-voltage side, the system can even support primary load conditions. This flexibility makes it a practical choice in scenarios where cost-effectiveness and reliability are both important considerations.
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