图50示出了输入端变压器耦合的直流回路。
Figure 50 shows the recommended dc return for a transformer-coupled input.
直流系统的绝缘性能直接影响直流回路的可靠性。
The insulation level influences reliability of DC loop in the DC system directly.
直流回路受到交流电压干扰，是控制回路中容易产生的现象。
It is common for the direct current circuit to be interfered by alternating current voltage.
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