For comparatively smaller single-phase load, the duplicatesupply single-phase transfer switch made of miniature contactors can be selected.
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。
2
In this connection, the override is analyzed in terms of protection principles. Suggestions on protection coordination of short line with duplicatesupply are put forth as well.
针对这种情况，从保护原理上对其超越情况进行分析，并对距离保护在双侧电源短线路的保护配合提出看法。
3
Also be sure that the company you hire will supply documentation allowing you to retrace their steps if necessary to solve a problem or duplicate their work at a later date.