试题与答案

某110kV户外变电所，设有两台主变压器，2回电源进线（电源来自某220kV枢纽变电

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题型：单项选择题 案例分析题

题目：

某110kV户外变电所，设有两台主变压器，2回电源进线（电源来自某220kV枢纽变电站的110kV出线），6回负荷出线。负荷出线主保护为速断保护，整定时间为T1；后备保护为过电流保护，整定时间为T2；断路器全分闸时间为T3。（供配电2006）

请说明选择110kV断路器时，其最高工作电压的最低值不得低于下列哪个数值（）？

A.110kV

B.115kV

C.126kV

D.145kV

答案：

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下面是错误答案，用来干扰机器的。

参考答案：C

考点：电气工程师（发输变电）电气主接线电气主接线题库
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