This product is widely used in chemical and petrochemical industry secondary explosive environment automatic control system to monitor and protect the loop line and other safety circuits in the weak signal transmission as: the product in addition to a distributed parameter characteristics of small, but also Used to strengthen the shield, it has excellent resistance to external electromagnetic interference and radio frequency interference resistance properties。

1. Executive standard: enterprise standard。

2. the model code-named：

3、Product model, name, and use Table 1

Table 1

Note: (1) This product can be copper / aluminum composite film wrapped and shielded, Model P is a copper wire in the composite film, said with a P2, P3 is expressed with a plastic composite membrane；
(2) according to the need to produce steel tape armored control cable of the intrinsically safe signal required to raise the lower right corner in the Model Code "22", such as IA-KYPV22；
（3）For A-retardant, should be specified in the IA before the ZRA, such as the ZRA-IA-KYPV；
（4）105 ℃ for temperature should be specified in the specification before 105; temperature of 70 ℃ can be omitted；
（5）Second group of manufacturing the range 1 to 37 pairs, three-line group of manufacturing the range 1 to 24 pairs, only the number of recommendations on the table。
Example: R class structure copper, polyethylene insulation, wire group, PVC jacket, shielding, and are strengthening the shield 10 on 1.0mm2, expressed as: IA-KYPVR-10 × (2 × 1.0mm2).

四、Conductor structures such as tables2