求翻译：该真空负荷开关选用优质的真空负荷开关，配置当今最先进的双稳态永磁操作金钩作为主枢动元件，机构操作元件少，二次回路控制简单，分、合闸电流小，在分、合闸状态下控制回路无需电源长期带电，实现无压运行。安全可靠，具有明显的节能效果。是什么意思？

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