对较小的单相负荷可采用由微型接触器构成的双电源单相切换开关。
For comparatively smaller single-phase load, the duplicate supply single-phase transfer switch made of miniature contactors can be selected.
然而在配电等级，联络开关用来开合同一变电站中不同变压器上的馈线或馈线段，或切换到邻近变电站以进行变电站变压器的负荷管理。
However, at the distribution level, 'tie switches are used to switch feeders or feeder sections between transformers in the same station, or to adjacent substations for substation transformer load.
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