Introduction to the Parameters of Double Shielded Cable DJYPVP for Computers：

1. Working voltage: AC 50Hz U0/U 300/500V

2.Long term maximum operating temperature of cable：

Polyethylene insulated cable+70 ℃;

PVC insulated cable+70 ℃;

Series code

Computer and Instrumentation Cable DJ

Copper conductor omitted

Polyethylene insulation Y

Polyvinyl chloride insulation V

Cross linked polyethylene insulation YJ

Polyethylene sheath Y

PVC sheath V

Copper wire or tinned copper wire braided shield P

Soft structure (for mobile installation) R

The code and representation method of cable combustion characteristics, as well as the requirements for combustion characteristics, comply with the provisions of GB/T 19666

Example: DJYPVP-3 * 2 * 1.5

3 pairs of 2-core 1.5mm ² copper core twisted pair polyethylene insulated copper wire braided shielding and total shielding PVC sheathed computer cable

3.The conductor shall comply with the requirements of the first and second types of GB/T 3956, and the soft conductor shall comply with the fifth type of conductor in GB/T 3956. Tin plated copper wire should also comply with the requirements of TXR type tin plated copper wire in GB/T4910. The conductor surface should be smooth, free of burrs, oil stains, and mechanical damage

4.The insulation should be polyethylene as indicated by the PE codeA type of extruded solid mediumThe nominal thickness of insulation shall comply with the provisions in the table below. The average thickness of insulation should not be less than the nominal thickness. The thickness at its thinnest point should not be less than 90% -0.1mm of the nominal thickness

4.1Structure of cabling components a) Line group——Two insulated conductors are twisted together and labeled as a Lineb Line; b) Three line group——Three insulated conductors are twisted together and labeled asa Lineb Line andｃLine;

c) Four wire group - four insulated conductors are twisted together and labeled as a line, b line, c line, and d line respectively.

Pitch of cabling components

In finished cables,1.5mm2The maximum twisting pitch of any of the following cable components should be100mm； 2.5mm2The maximum twisting pitch of any cable component in fire-resistant cables should be120mm. Adjacent unshielded cable elements in the cable should use different twisting pitches. Identification of cable components

Cable components can be identified using color bands, numbers, or chromatography. If chromatographic identification is used, blue/white, red/white, green/white, red/blue are used for line group chromatography, with blue/white pairs as marker pairs, and their chromatograms are executed according to the following table

Shielding can be achieved through metal tape wrapping, longitudinal wrapping, or metal wire weaving. Flexible cables used in mobile applications should adopt copper wire braided structureType.

The thickness of one layer of overlapping wrapping outside the cable core is 0.05mm Polyester tape can also be used as wrapping material, and other non hygroscopic tapes that will not melt at the highest rated working temperature of the cable can be used, with a winding overlap rate of not less than 50%；Or wrap it in two layers, with an overlap rate of not less than 25%.

totalShielding form: Shielding forms include copper wire weaving, composite tape wrapping or longitudinal wrapping, aluminum-plastic composite tape+Copper wire weaving and other types. flexible cableIf used in mobile situations, copper wire weaving structure should be adopted.

5. sheath thickness

The nominal thickness value TS (in mm) of the extruded sheath should be calculated according to the following formula:

Fluoroplastic sheath TS=0.025 D+0.4 minimum thickness of 0.6mm Silicone rubber sheath TS=0.035 D+1.0 minimum thickness of 1.4mm Other sheath materials: TS=0.025 D+0.9 minimum thickness of 1.0mm

In the formula: D - the assumed diameter of the cable before the extruded sheath, in millimeters. The value calculated by the above formula should be rounded to approximately 0.1mm.

The average thickness of the sheath should not be less than the nominal thickness, and the thickness at its thinnest point should not be less than 85% -0.1mm of the nominal thickness

6. Testing

Each conductor to be tested is relative to the other conductors bundled together/Shielding/Insulation resistance between armors, using DC 500V Voltage test, Stable charging 1 After minutes,PETheXLPETheF insulation 20℃Each kilometer should not be less than 3000MΩ，GThePVCTheWJ1 insulation At 20 ℃ per square meterIt should not be less than 25MΩ。

For cables with separate shielding pairs, when the test voltage is DC 500V，Stable charging 1 Insulation between shields measured minutes laterresistance20At ℃, the distance per kilometer should not be less than1MΩ

Finished cable marking

The surface of the sheath of the finished cable should have continuous markings indicating the manufacturer's name, product model, and rated voltage. The markings should be clear, easily recognizable, and scratch resistant. Finished cable markings shall comply with the provisions of GB/T 6995

The product should be inspected and approved by the manufacturer before leaving the factory, and each packaging should be accompanied by a product quality inspection certificate

Deliver according to the agreed length between both parties.

If there is no agreement between the two parties, the delivery length allowed should not be less than 100m.

Short cables with a length of no less than 20m are allowed to be delivered, and their quantity should not exceed 10% of the total delivery length. The length measurement error shall not exceed ± 0.5%

Seeing this, I believe you are rightIntroduction to the Parameters of Double Shielded Cable DJYPVP for ComputersI already have some understanding. If you have any orders or don't understand, please call me