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[欧洲|VDE] 2016线缆阻燃研讨会17-EXAP for fire class – power cables

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EXAP for fire class – power cables

EXAP for power cables
▪        General rules for the application of the EXAP:
The application is NOT allowed (at the moment) for
− Fire class B1
− Tests on bundled cables, i.e. for cables with a diameter below 5 mm 成束样品
− Tests on cables with a non-round cross-section 横截面非圆形
− Tests on cables without at least one metallic conductor 没有金属导体

▪        General procedure:
•        Within EXAP, cable families are defined (see next slide) 系列的定义
•        Within these families, according to special rules test samples are selected 测试样品选 取
•        Safety margins are added to the test results of these test samples 安全临界值的标注
•        The lowest values out of these results generate a (fictitious) set of results 最低值标注
•        The classification of this set of results give the fire class of the family 系列燃烧等级判定

▪   A cable family consistsof cable types of the same general design

  
Variation
  
  
•          Different conductor  form (round, shaped)
  
  
•          Different conductor  construction
  
  
Family
  
new new
  
  
Source
  
  
TS 50576
  
  
TS 50576
  
  
(class 1/2 vs. 5/6)
  
  
  
  
  
  
•          With / without armouring 铠装
  
  
new
  
  
TS 50576
  
  
•          With / without concentric elements 同轴
  
  
new
  
  
TS 50576
  
  
•          Different manufacturer
  
  
new
  
  
TS 50576
  
  
•          Different materials
  
  
new
  
  
TS 50576
  
  
•          Different design rules
  
  
new
  
  
TS 50576
  
  
•          Different voltage level
  
  
new
  
  
TS 50576
  
  
•          Metallic  / non-combustible tapes
  
  
new (u.d.)
  
  
MoM CLC TC20WG10
  
  
金属的/不易燃类型
  
  
  
  
  
▪        Two procedures

•        General EXAP:
− Calculations are more complex
− At least three tests are necessary
− General EXAP can be applied for all cable types (within the mentioned scope)

•        Special EXAP
− Calculations are more simple
− Only two tests are necessary
− Special EXAP can only be applied for the following standard cable families:
▪        Single core cables, with/without sheath 有或没有护套的单芯线
▪        Multi core cables, with/without armour 有或没有铠甲的多芯线
− There are restrictions concerning the dimension of the cable 线缆的外径会受到限制

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