分析表明，由于连接电缆两端产生的反射现象导致SPD和负载上的电压振荡。
The reflection phenomena on the cables between an external SPD and the protected equipment lead to the oscillations of the voltages on the SPD and on the load.
现在，你需要一个可变电源连接电池线，或某种可变负载。
Now you need either a variable power supply connected to the battery lines, or some kind of variable load.
使用人员应记得随时观察最大的允许负载电流（相对可选定的负载持续率），保持焊接电流不超过最大的允许负载电流。
Use should always remember to observe the largest load current (relative to the load can be selected sustained rate), maintaining welding current is not allowed to exceed the maximum load current.
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