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矿用通信电缆技术文章

煤矿通信电缆

fire retardant control cables inmines

产品用途:产品用于煤矿井下电话通信干线、配线和用户线路。
scope of application:the product uses in thecoal mine mine shaft telephone communication skeleton line, matchesthe line and the subscriber"s loop
执行标准 standards implemented:mt 818-1999
型号、名称及使用范围
model、desc-riptions and usescope
 
型号
model
名称
desc-riptions
使用范围
use scope
mhyv
煤矿用聚乙烯绝缘聚氯乙烯护套通信电缆
pe insulated pvc sheathed communication cables for coalmines
用于平巷、斜巷及机电硐室
served in level,slanted channels and power house
mhjyv
煤矿用加强型线芯聚乙烯绝缘聚氯乙烯护套通信电缆
reinforced core pe insulated pvc sheathed communication cables forcoal mines
用于机械损伤较高的平巷和斜巷
served in level and slanted channels where mechanical damage isfrequent
mhybv
煤矿用聚乙烯绝缘镀锌钢丝编织铠装聚氯乙烯护套通信电缆
pe insulated galvanized steel wire weave armored pvc sheathedcommunication cables for coal mines
用于机械冲击较高的平巷和斜巷
served in level and slanted channels where mechanical damage isfrequent
mhyav
煤矿用聚乙烯绝缘铝-聚乙烯粘护层聚氯乙烯护套通信电缆
pe insulated al/pe binding layer pvc sheathed communication cablesfor coal mines
用于较潮湿的斜井和平巷
served in level and slanted channels with highhumidity
mhya32
煤矿用聚乙烯绝缘铝-聚乙烯粘结护层钢丝铠装聚氯乙烯护套通信电缆
pe insulated al/pe binding layer steel wire armored pvc sheathedcommunication cables for coal mines
用于竖井或斜井
served in shaft and slanted shaft
使用特性 servicecharacteristics
电缆长期允许工作温度 long-term service temperature of the cable conductor
-40℃-+50℃
电缆敷设温度 cable laying temperature
≥-10℃
+25℃时环境相对湿度
environment relative humidity at 25℃
≤95%
电缆的*小弯曲半径 minimun bending radius
mhyv及mhjyv型电缆为电缆外径的10倍，其它型号为外径的15倍10 times of the cable outer diameterof mhjyv, and 15times for the rest
电缆规格 specifications
型号
model
规格
specifications
导体结构(根/直径)mm
conductor structure(number/diameter)
mhyv
1x2、2x2、1x4、5x2
7/0.28
mhjyv
1x2、2x2
4/0.28铜线+3/0.28钢线 4/0.28
copper wire +3/0.28 steel wire
mhybv
5x2、10x2、20x2
1/0.8
mhyav
20x2、30x2、50x2
mhya32
30x2、50x2、80x2
电缆主要技术性能 major technicalperformances
型号
model
20℃时导体直流电阻
dc resistance of conductor at 20℃
≤ω ( ， /km)
固有衰减(800hz)
intrinsic attenuation
≤( ,db/km)
mhyv
45
1.10
mhjyv
73
1.30
mhybv mhyavmhya32
36.7
0.95
2、电缆其它主要技术性能 other major technicalperformances
( mhyv、mhjyv、mhybvmhyav、mhya32)
序号
serial number
项目
items
技术性能
technical performances
1
+20℃线芯直流电阻(≤ω/km)
line core dc resistance at 20℃
见上表 see above table
2
电缆固有衰减(≤db/km)
cable intrinsic attenuation
见上表 see above table
3
+20℃绝缘电阻(≥mω km)insulating resistance at 20℃
3000
4
lmin工频交流电压试验
lmin power frequency alternating current pressuretest
1500v不击穿(50hz)
1500v does not penetrate
5
远端串音衰减(≥db/500)
far-end crosstalk attenuation
70(800hz)
6
电感(≤μh/km)
inductance
800(800hz)
7
电缆工作电容(≤μf/km)
cable service capacity
0.06(800hz)
8
工作对直流电阻差(≤%环阻)
dc resistance difference
2
9
单根垂直燃烧试验
combustion for single cable test
mt386
10
成束燃烧试验
combustion for bunched cable test
符合gb/t18380标准中b类成束燃烧试验要求
conforms to gb/t18380 standard b kind becomes ties the burningtest
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