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1、什么是earth bar ，earth boss？
是在这句话里出现的（有关接地方面的内容）
The Main Earth Reference point shall be bosses welded to the structure as close
as possible to the equipment. Earth bars mounted on earth bosses welded to
structure may also be used.
2、什么是field equipment？什么是bonding？
3、cable的make-off是指什么
4、Instrument and telecommunication cables with both braid armour and screen shall have inner and outer heat shrink sleeves.
这里的screen和braid armour 是指什么？screen是屏蔽线，braid armour是指那种铠装的护套吗？
5、lug和ferrule 是线耳还是什么？
6、be left floating at the field end 是什么意思？
7、还有一段处理电缆的话专业词汇太多，糊涂的，如果哪位大哥有时间的，帮忙讲解一下，感激。。。图放在附件里
All cables entering or leaving the Enclosures (via the base frame), must pass through
and be clamped by means of one of the following: Multi Cable Transit (MCT) frames
and packing pieces, Marcon EMC Multigate, Glands or Sliding Plates with EMC
gaskets. Ref. figures 2 and 3.
An alternative cable clamping system may be used provided it is acceptable to the
vessel's Classification Society and the project.
If the enclosure only contains equipment that is tested according to IEC 60945, there is
no requirement for 360 degree screening on field cables.
In such a case, it(R)(TM)s adeuate to connect the screen (pigtail) to the proper Earth-bar, and
seal or mould the cable entry to fulfil the degree of protection (IP xx )
The below sketch shows the field and power-cable screen connection in the Field
Termination Cabinet. |
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发表于 2008-12-1 20:31
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