Characteristics of computer cables reference standards for computer cables

Author：hlyb Add Time：2016-05-13 16:54:39

1. Scope

This standard specifies the product classification, technical requirements, test methods and inspection rules of electronic computer cables (hereinafter referred to as cables).

This product is suitable for power generation, metallurgy, petrochemical and other industrial and mining enterprises distribution system, electronic computer system, automation system signal transmission and detection instruments, meters, etc., as a connecting line.

1. Reference standards

Gb2951 test of mechanical and physical properties of wires and cables

Gb3048 test methods for electrical properties of wires and cables

Gb3953 electrical round copper wire

Gb4005 wire and cable delivery tray

GB4909. 2 bare wire test methods - Measurement of dimensions

Gb8170 rules for rounding off numerical values

Gb8815 flexible PVC for wire and cable

Ch2-1398 low density polyethylene resin

2. Use environment:

1. Working temperature: no more than 70 ℃ for general type and 105 ℃ for model with 105.

2. Low ambient temperature: fixed laying - 40 ℃ non fixed laying - 15 ℃.

3. Rated voltage U0 / u 450 / 750

4. Small bending radius: the cable without armor layer shall not be less than 6 times of the outer diameter of the cable, and the cable with armored layer shall not be less than 12 times of the outer diameter of the cable.

3. Model and name

3.1.1 model structure combination mode:

3.1.2 model and name

Table 1

model	Name	Laying mode
DJYVP	General shielding computer cable with copper core, polyethylene insulation and PVC sheath and copper wire braiding	Fixed laying
DJYPV	Computer cable with copper core, polyethylene insulation and PVC sheath, copper wire braided and shielded
DJYPVP	Computer cable with copper core, PE insulation, PVC sheath, copper wire braiding, sub shielding and total shielding
DJYVRP	Computer cable with copper core, polyethylene insulation, polyvinyl chloride sheath, copper wire braided total shielding soft core computer cable	Mobile use
DJYPVR	Computer cable with copper core, polyethylene insulation and PVC sheath, copper wire braided and separately shielded soft core computer cable
DJYPVPR	Computer cable with copper core, PE insulation, PVC sheath, copper wire braided sub shielding and total shielding soft core computer cable
DJYVP22	General shielding computer cable with copper core, polyethylene insulation and PVC sheath and copper wire braiding	Directly buried underground
DJYPV22	Computer cable with copper core, polyethylene insulation and PVC sheath, copper wire braided and shielded
DJYPVP22	Computer cable with copper core, PE insulation, PVC sheath, copper wire braiding, sub shielding and total shielding

Zr before the model is flame retardant.

3.1.3 specifications

Cable specifications are as follows: Table 2

model

Rated voltage

（U0/U）

Check number

Nominal section (M2)

DJYVP

DJYPV

DJYPVP

DJYVRP

DJYPVR

DJYPVPR

DJYVP22

DJYPV22

DJYPVP22

450/750

1，2，3，4，5，6，7，8，10，

12，14，16，19，24

0．75，1．0，1．5

5. Technical requirements

5.1 conductor

5.1.1 the conductor material shall meet the requirements of gb3953.

5.1.2 type 1 or type 5 conductor in GB / t3956 shall be used for conductor core, and the conductor structure is shown in Table 3.

5.1.3 the conductor surface shall be smooth and clean, free from oil stain, burr, sharp edge and protruding or broken single wire.

5.1.4 the DC resistance of cable conductor at 20 ℃ shall meet the requirements.

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Characteristics of computer cables reference standards for computer cables