




产品标题:ABB AI830A 3BSE040662R1风电价优电源数字量控制卡
型号:ABB AI830A 3BSE040662R1
品牌:ABB
质保:七天验收期,质保期一年
发货期:1-3个工作日
产品图片展示
产品详情资料
跨度的支撑。温度计应静置一分钟
在阅读之前。
当温度已知时,用
垂度图表。弧垂板条固定在弧垂跨度内的每个电杆上。这条板条是直的
木材长度以及板条与
导线穿过架线轮是从表或垂度图上读取的值。
指定进行下垂的人员将站在其中一个
下垂板条,并从一条下垂板板条的顶部到上垂板条的顶端画一条视线
图11.2所示的另一个电杆。当导线的垂度与其线路水平时
看得出,它的下垂度是正确的。建议的做法是通过
10%(即降低10%的下垂度),并在终前静置约15分钟
松弛到正确的下垂度。
11.5下垂非水平跨度
当中间没有水平跨度时,非水平跨度只能用作下垂跨度
架线点。非水平跨度的垂度通过“非水平跨度”确定
垂度公式”,如图11.3所示,用水平垂度表示垂度
相同长度的跨度。16.4节中规定的测量弧垂的相同方法为
除弧垂板条和导线所在点之间的垂直距离外使用
穿过架线滑车的长度应为根据非水平跨度垂度计算得出的值
公式。
11.6装订
g sagging and the thermometer should therefore be hung on one of the conductor
supports of the sagging span. The thermometer should be allowed to settle for a minute
before taking reading.
When the temperature is known, the corresponding sag for the sagging span is read off the
sag charts. A sag lath is fixed on each of the poles in the sagging span. This lath is a straight
length of wood and the vertical distance between this lath and the point at which the
conductor runs through the stringing wheel is the value read off the table or sag chart.
The person who is appointed to do the sagging will position himself behind one of the
sagging laths and take a sight line from the top of one sag lath to the top of the sag lath on
the other pole as shown in Drawing 11.2.When the sag of the conductor is level with his line
of sight, it is at the correct sag. It is recommended practice to over-tension the conductor by
10% (i.e. decrease sag by 10%) and allow to settle for about fifteen minutes before finally
slacking back to the correct sag.
11.5 Sagging Non-Level Spans
Non-level spans shall only be used as sagging spans when there are no level spans between
stringing points. Sags for non-level spans are determined by means of the “Non-Level Span
Sag Formula” given in Drawing 11.3 which express the sag in terms of the sag of a level
span of the same length. The same method as for measuring sag specified in section 16.4 is
used except the vertical distances between the sag lath and the point at which the conductor
runs through the stringing block shall be the values calculated from the non-level span sag
formulas.
11.6 Binding
When the sagging operation is finished, the conductor is transferred to the insulators and the
conductors terminated. The post type insulators sha
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