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碍齿-骋厂-痴痴笔补偿电缆本质安全防爆测温系统用热电偶补偿电缆

Extension cable used in thermocouple for intrinsically

safe explosion-proof temperature testing system

一、碍齿-骋厂-痴痴笔补偿电缆特点及用途

　　　　补偿电缆由一定数量的对绞式补偿线对或屏蔽补偿线对绞合成缆，然后包覆屏蔽层、护套、铠装层等。其中各补偿线对的型号、规格、级别和结构尺寸一般是相同的，当有特殊要求时，亦可由不同的补偿线对组成补偿电缆。

补偿线对均采用绞合型式，屏蔽层按材料可分为铜线或镀锡铜线编织屏蔽、铝塑复合带绕包屏蔽、铜塑复合带绕包屏蔽、铜带绕包屏蔽，按结构可分为&濒诲辩耻辞;总屏蔽&谤诲辩耻辞;和&濒诲辩耻辞;分对屏蔽加总屏蔽&谤诲辩耻辞;的型式，可根据防干扰的要求选用。

碍齿-骋厂-痴痴笔补偿电缆补偿电缆用以延伸一定区域内诸热电偶的冷端与各显示仪表连接构成测温系统。

本质安全防爆测温系统用热电偶补偿电缆是由多对本质安全防爆测温系统用补偿导线组合而成的电缆。其特征与本质安全防爆系统用补偿导线相同。

本安补偿电缆用于将多个防爆热电偶冷端延伸一定距离与显示仪表连接构成本质安全防爆测温系统。

Ⅰ. Characteristics and application

It is stranded with a certain number of twisted extension wire pairs or shield extension wire pairs, covered with shield layers, sheathed and armoured layers. The type, specification, class and structure sizes of extension wire pairs are generally same. When a special requirement is given, the cable can also be formed by different extension wire pairs.

There are many kinds of shield for twisted extension wire pairs such as copper wire or tin plated copper wire braid shield, composite aluminium-plastic tapes wrap shield, composite copper-plastic tape wrapped shield, copper tapes shield,　“general shield”　and　“sub plus general shield　”. It is possible to select the shield according to requirements of interference prevention.

Extension Cable is used to extend cold clamps of thermocouple and connects them with instruments, which forms temperature-testing system.

Extension Cable used in thermocouple for intrinsically safe explosion-proof temperature testing system consists of multiple-pairs of extension wire. In that case, the characteristics of the cable are just the same as those of the wire used for intrinsically safe explosion-proof temperature testing system.

Intrinsically safe extension cable extends cold clamps of explosion-proof thermocouple for a certain distance to connect instruments, which forms intrinsically safe explosion-proof temperature-testing system.

二、产物执行标准

　　　 GB/T4989-94和 公司标准

Ⅱ. Implemented standard

　　　 GB/T4989-94 and Enterprise standard

叁、使用特性：

　1．电缆高长期工作温度：

　　　　耐热级：氟塑料200℃和260℃两种；

　　　　普通级： 聚氯乙烯70℃和105℃两种，交联聚乙烯90℃，无卤低烟阻燃聚烯烃70℃(交联型90℃和125℃)。

　2．电缆低环境温度：

　　　　聚氯乙烯等绝缘和护套：固定敷设－40℃；非固定敷设－15℃；

　　　　氟塑料绝缘和护套：固定敷设－60℃；非固定敷设－20℃。

　3．电缆安装敷设温度：

　　　　聚氯乙烯等护套电缆不低于0℃；

氟塑料护套电缆不低于－25℃。

　4．电缆允许弯曲半径：非铠装、联锁或编织铠装电缆应不小于电缆外径的6倍；

　　　　　　　　　　　　　　　　　　铜带屏蔽或钢丝钢带缠绕铠装电缆应不小于电缆外径的12倍；

　　　　　　　　　　　　　　　　　　氟塑料绝缘和护套电缆应不小于电缆外径的8倍。

Ⅲ. Characteristics

　1. The highest long-term operating temperature:

　　　 Heat-resistant class:　 Fluoroplastics 200℃ and 260℃ two types

　　　 General class: PVC 70℃ and 105℃ two types, Cross-linked polyethylene 90℃,

　　　　　　　　　　　　　　 Halogen-free and low smoke flame-proof polyolefin 70℃,

　　　　　　　　　　　　　　 Cross-linked polyethylene 90℃ or 125℃ two types。

　2. The lowest environment temperature:

PVC insulation and sheath: Fixed deploying -40℃; non-fixed deploying -15℃.

Fluoroplastic insulation and sheath: Fixed deploying -60℃; non-fixed deploying -20℃.

　3. Mounting and deploying temperature

PVC sheath:　　　　　　　　　　　　　　 Not lower than 0℃

Fluoroplastic sheath:　　　 　Not lower than -25℃

　4. Permitted bending radius

Permitted bending radius is not smaller than 6 times of outer diameter of the cable for the non-armoured，interlock or braid armoured one and 12 times for the copper tape shielded, steel wire winding or steel tape wrapping armoured one. Bending radius of fluoroplastics insulated and sheathed cable should not be smaller than 8 times of outer diameter of the cable.

四、主要技术指标：

热电偶补偿电缆型号、合金丝材料、绝缘颜色、护套颜色、分类、精度等级、热电势、允差及往复电阻均与补偿导线相同。