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.
二次配电系统是由降压变压器和满足最终用电设备电压等级的二次电路组成。
The secondary system consists of step-down transformers and secondary circuits at utilization voltage levels.
也就是说，在阻抗匹配平衡牵引变压器SF 2 - QY的基础上再提高一个容量等级。
That is, one more capacity grade can be increased on the base of impedance-matched balance traction transformer SF2-QY.
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