Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.

另外，三相四线制有源电力滤波器能有效地抑制零线电流，并能有效地解决系统的不对称问题。

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Set this constant to a non-zero value to enable diagnostic messages to be printed or set it to zero to suppress them.

将这个常量设置为非零值，以便显示诊断消息；或者将其设置为零，以便抑制诊断消息。

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Just before the voltage source is turned on, disable the meter's zero check and suppress the charge reading by using the REL function to zero the display.

在电压源即将打开之前，关闭仪器的零点检查功能并使用REL功能抑制电荷读数，使显示为零。

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