矿用通信电缆 fire retardant control cables in mines
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| 产品用途:产品用于煤矿井下通信干线、配线和用户线路。 | | scope of application:the product uses in the coal mine mine shaft ephone communication skeleton line, matches the 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 use scope | | | |
| 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 coal mines | 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 for coal mines | 用于机械损伤较高的平巷和斜巷
served in level and slanted channels where mechanical damage is frequent | | 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 sheathed communication 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 is frequent | | 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 cables for coal mines | 用于较潮湿的斜井和平巷
served in level and slanted channels with high humidity | | 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 sheathed communication cables for coal mines | 用于竖井或斜井
served in shaft and slanted shaft | |
| 使用特性 service characteristics |
| 电缆*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zui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 diameter of 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 technical performances |
| 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 mhyav mhya32 | 36.7 | 0.95 | |
2、电缆其它主要技术性能 other major technical performances （ mhyv、mhjyv、mhybv mhyav、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 pressure test | 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 burning test | |
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