输出为短路保护，接地，但获得最大的可靠性，如果输出电流不超过160毫安。
Output is short circuit protected to ground, however maximum reliability is obtained if output current does not exceed 160mA.
能可靠判断、检测界内与界外毫安级零序电流及相间短路故障电流，实现自动切除单相接地故障和相间短路故障。
Can reliably determine, within the community and bounds detection ma level and zero-sequence current phase short circuit fault current, automatic removal of single-phase ground fault and phase fault.
配装接地开关的负荷开关，可以承受短路电流。
Equipped with grounding switch load switch, can withstand short-circuit current.
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