A, product characteristics and USES:
Electronic computer shielded cable is used for power generation, metallurgy, petrochemical and other industrial and mining enterprises and distributing system, computer system, signal transmission of the automation system and testing instruments, meters and other connection with multiple of shielded cable.
Second, the electronic computer shielded cable using features:
Working temperature: general type does not exceed 70 ℃, after the model 105 is highest do not exceed 105 ℃.
Minimum ambient temperature: fixed installation to 40 ℃ the fixed installation to 15 ℃
The rated voltage Uo/U: 300/500 v
The minimum bending radius: no armoured layer cable should be not less than 6 times of cable diameter
Layer with armored cable should be not less than 12 times of cable diameter
Three, computer shielded cable main technical indicators:
| Performance of the project | unit | Technical indicators | ||
| Polyethylene insulation | PVC insulated | |||
| Insulation resistance when 20 ℃ | As a line between the conductors | M Ω · km | 500 | 25 |
| Between the shielding line | 1 | 1 | ||
| Capacitance (1 KHZ) | Type 3 | pF/m | 75 | 200 |
| 1 and 2 | 90 | |||
| Capacitance unbalance (1 KHZ) | pF/M | 1 | / | |
| Inductive resistance than | Cross section | Mu h/Ω | 20 20 25 35 | 20 20 25 35 |
0.5mm2 | ||||
| Shielding inhibition coefficient or less | 0.01 | 0.01 | ||
| Test voltage | V/1min | 1000 | 1000 | |
| Flame retardant | Comply with the requirements of 12666-90 | Comply with the requirements of 12666-90 | ||
Four, computer shielded cable type:
| project | Code name | instructions |
| Flame retardant code | / ZR ZRA ZRB ZRC | The flame retardant can be omitted Flame retardant Grade A flame retardant Class B fire retardant Class C fire retardant |
| A series of codes | DJ | The electronic computer (including DCS system) and electric instrument |
| Insulation materials | Y V D W | polyethylene Polyvinyl chloride (PVC) Low smoke low halogen polyvinyl chloride (PVC) Low smoke zero halogen polyvinyl chloride olefins |
| Shielding materials | P P1 P2 P3 | Copper wire braided Tin plated copper wire weaving Copper/polyester composite membrane Aluminum/polyester composite membrane |
| Sheath material | Y V D W | Heat resistant polyethylene Polyvinyl chloride (PVC) Low smoke low halogen polyethylene Low smoke zero halogen polyolefin |
| Armoring materials | 22 | Steel tape armoured |
| Conductor type | A B R | Single strand conductors Seven strands of stranded conductor More flexible conductor |
| specifications | Fill in the logarithmic x (unit some x conductor cross section) Logarithmic N: 1, 2, 3,......19 Unit some n: 2, 3 S: conductor section 0.5, 0.75, 1.0, 1.5, was |
