）Shielding Cable for Intrinsic Safe Computer Application

Shielding Cable for Intrinsic Safe Computer Application（Shielding Cable for Intrinsic Safe DCS System Application）

1.Scope of application

It is used to transmit automatic control signal in the environmentnot only with exploding danger such as petroleum, chemical plant.power, gas project and mine but also with high demand on explosionproof performance.lt is decentralized type instrument signacable with the feature of low capacitance &low inductance& good shielding performance and interference proof performance.which is also named as Intrinsic safety type cable for DCS system.So, its performance of explosion-proof & safety is apparentlyhigher compared with common computer control cable and cablefor DSC.

2.Executive standard

Enterprise standard

3.Performance for Usage

1: AC rated voltageUo/U: 300/500V.

2: Max temperature of cable conductor for long term working is 70℃for cable with PE insulation,90℃ for cable with XLPE insulationand 70℃for cable with free halogen, low smoke,flame retardant,polyolefin insulation.

3: Min. environment temperature is -40℃ for fixed laying and -15℃for non-fixed laying. Environment tem- perature for installing isno less than 0℃.

4: Bending radius allowed by cable is no less than 6 times that ofcable OD for inarmored braided shield-ing cable and 12 timesthat of cable OD for copper tape shieldin g armored cable.

4.Basic Type and Description

5.Type，Description and Definition

eg:

nsulation or sheath material:

Y: PE insulation and sheath OR free halogen,lowsmoke, flame retardant, polyolefin extruded insulation& sheath

YJ: XLPE extruded insulation

Flame retardant performance category:

ZRA: category A (the best)

ZRB: category B

ZRC: category C

Prefix“ZRA-”、“ZRB-”、“ZRC-”should beadded to the original type for cable with intrinsicsafety type cable

Armor structure:

22 means steel tape armor, PVC outer sheath

23 means steel tape armor, PE outer sheath

32 means round galvanized low carbon steel wirewrapping, armor, PVC outer sheath

33 means round galvanized low carbon steel wirewrapping, armor, PE outer sheath

Shielding material:

P means copper wire braiding

P1 means tinned copper wire braiding

P2 means copper-plastic compound tape wrapping

P3 means aluminum- plastic compound tape wrapping

Conductor category:

A means single conductor (omitted in type)

B means 7 stranded conductor(“B”shall be addedafter specification)

C means multi-stranded conductor

6.Specification Scope

Pair No.: 1~24 pairs

Core No.per pair: 2 cores(equal to 2 wire group )or3 cores(equal to 3 wire group)

Cross section area of conductor: 0.5mm² 、0.75mm²、1.0mm²、1.5mm²、2.5mm²

7. Comparison between other common type and type of our

company

8.Main Technical Parameter

1、DC resistance of conductor at 20℃

3.Cable shall endure A.C. voltage test of1500V under power frequencyfor 1min without puncture of insulation. And testing temperatureis environment temperature.

4.Working capacitance (1KHz): core to core s90PF/m

5.Distributing inductance (1KHz) S0.6 H/m

6.Inductive voltage of electromagnetic interference(inte rferencemagnetic field): ≤5mV

7.Inductive voltage of electrostatic(static voltage) <1V

8.Penetration stress of radiant field(stress of interfer- ence fieldis 120dB uV; frequency of interference field is 200MHZ )66dByV