问题 问答题 简答题

高压悬式绝缘子的结构有哪些?

答案

参考答案:

其结构主要有绝缘材料、金具、粘合剂三部分组成。

(1)绝缘材料。高压电瓷是目前应用最广泛的绝缘材料,由石英、长石和土作为原料烧结而成,表面上作涂釉后具有良好的电气、机械、耐电弧、抗污闪等化学稳定及抗老化性能。玻璃是除电瓷以外的另一种绝缘材料。

(2)金具材料。金具附件材料主要由铸铁组成。盘式绝缘子的金具是由铁帽、钢脚构成。组合绝缘子串时,钢脚的球接头插人铁帽的球窝中,成为球绞链软连接。

(3)粘合剂。将瓷料及附件胶合连接的材料,一般利用500号的硅酸盐水泥,配合瓷粉瓷砂作为填充材料。

单项选择题

German Chancellor Angela Merkel won over German voters in the Federal Election on Sept. 27. Can she now be won over by a French charm offensive (1) at repairing the relationship that was once at the heart of Europe That’s the question being asked in Paris, (2) top government officials are (3) talking about their desire to rekindle closer ties (4) their neighbors across the Rhine. (5) the end of World War II the Franco-German relationship has been the motor of European integration, the (6) force behind the creation of the European Union and, more recently, the introduction of the euro. But the ardor has (7) in this decade, particularly under Merkel, who has regularly struggled to (8) her irritation with French President Nicolas Sarkozy’s grandstanding. Sarkozy, (9) , has often been impatient with what he (10) Merkel’s lack of resolve.

The sometimes (11) personal rapport is a long way from the public shows of affection their predecessors staged, particularly Helmut Kohl and FranCois Mitterrand, who movingly held (12) in 1984 in a Verdun cemetery. There’s been tension on (13) , too. Charles Grant, director of the London-based think tank Centre for European Reform, points out that France and Germany have been (14) on issues from how best to reflate their economies during the economic (15) to the smartest strategies for dealing with Russia.

But influential movers in France are now (16) to put the relationship back on a friendlier footing. In a recent paper French think tank Institute Montaigne (17) an ambitious agenda for the two nations, (18) that a new impetus is needed if Europe’s voice is to be heard in a world (19) of big new players, such as Brazil and India, and at a time when President Obama seems fax more (20) with China and the rest of Asia than with America’s traditional allies in Europe.

14()

A. at the cost

B. at peace

C. at odds

D. at a loss

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