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Jiede (Anhui) Measurement and Control Technology Co., Ltd
Date: 2023-08-14Read: 8
Intrinsically safe computer cable
Shielded cables for intrinsically safe computers (also known as cables for intrinsically safe DCS systems) are suitable for use in hazardous environments such as petroleum, chemical, power, gas engineering, mining, and other places with high explosion-proof safety requirements, transmitting automatic control signals. This cable has low capacitance and low inductance distributed instrument signal cable, abbreviated as intrinsic safety DCS system cable, with excellent shielding performance and anti-interference performance. Therefore, its explosion-proof safety performance is significantly higher than that of general DCS system cables and computer control cables.
Usage characteristics
1. Rated AC voltage U0/U: 300/500V
2. The maximum allowable working temperature for cable conductors in the long term is 70 ℃ for PVC insulation; Cross linked polyethylene insulation at 90 ℃; The insulation of halogen-free low smoke flame-retardant polyolefin is 70 ℃.
3. Low ambient temperature: Fixed installation -40 ℃; Non fixed installation -15 ℃; The ambient temperature during installation and laying shall not be lower than 0 ℃.
4. Allowable bending radius for cables: Non armored and braided shielded cables shall not be less than 6 times the outer diameter of the cable; Copper tape shielded and armored cables shall not be less than 12 times the outer diameter of the cable.
■ Basic model |
model |
name |
IA-DJYPVP |
Polyethylene insulated PVC sheathed copper wire braided split screen total screen intrinsically safe DCS cable |
IA-DJYPVPR |
Polyethylene insulated PVC sheathed copper wire braided split screen total screen intrinsically safe DCS flexible cable |
IA-DJYP3VP3 |
Polyethylene insulated PVC sheathed aluminum-plastic composite tape wrapped sub screen total screen intrinsically safe DCS cable |
IA-DJYP3VP3R |
Polyethylene insulated polyvinyl chloride sheathed aluminum-plastic composite tape wrapped sub screen total screen intrinsically safe DCS flexible cable |
IA-DJYP2VP2 |
Polyethylene insulated PVC sheathed copper plastic composite tape wrapped split screen total screen intrinsically safe DCS cable |
IA-DJYP2VP2R |
Polyethylene insulated PVC sheathed copper plastic composite tape wrapped split screen total screen intrinsically safe DCS flexible cable |
IA-DJYJPVP |
Cross linked polyethylene insulated polyvinyl chloride sheathed copper wire braided split screen total screen intrinsically safe DCS cable |
IA-DJYJPVPR |
Cross linked polyethylene insulated polyvinyl chloride sheathed copper wire braided split screen total screen intrinsically safe DCS flexible cable |
IA-DJYJP3VP3 |
Cross linked polyethylene insulated polyvinyl chloride sheathed aluminum-plastic composite tape wrapped split screen total screen intrinsically safe DCS cable |
IA-DJYJP3VP3R |
Cross linked polyethylene insulated polyvinyl chloride sheathed aluminum-plastic composite tape wrapped split screen total screen intrinsically safe DCS flexible cable |
IA-DJYJP2VP2 |
Cross linked polyethylene insulated polyvinyl chloride sheathed copper plastic composite tape wrapped split screen total screen intrinsically safe DCS cable |
IA-DJYJP2VP2R |
Cross linked polyethylene insulated polyvinyl chloride sheathed copper plastic composite tape wrapped split screen total screen intrinsically safe DCS flexible cable |
WDZ-IA-DJYPVP |
Halogen free low smoke flame-retardant polyolefin insulated and sheathed copper wire braided split screen total screen intrinsically safe DCS cable |
WDZ-IA-DJYPVPR |
Halogen free low smoke flame-retardant polyolefin insulated and sheathed copper wire braided split screen total screen intrinsic safety DCS flexible cable |
WDZ-IA-DJYP3VP3 |
Halogen free, low smoke, flame-retardant polyolefin insulated and sheathed aluminum-plastic composite tape wrapped split screen total screen intrinsically safe DCS cable |
WDZ-IA-DJYP3VP3R |
Halogen free low smoke flame-retardant polyolefin insulated and sheathed aluminum-plastic composite tape wrapped split screen total screen intrinsically safe DCS flexible cable |
WDZ-IA-DJYP2VP2 |
Halogen free low smoke flame-retardant polyolefin insulated and sheathed copper plastic composite tape wrapped split screen total screen intrinsically safe DCS cable |
WDZ-IA-DJYP2VP2R |
Halogen free low smoke flame-retardant polyolefin insulated and sheathed copper plastic composite tape wrapped split screen total screen intrinsically safe DCS flexible cable |
■ Specification range |
Logarithms: 1-24 pairs
Number of cores per pair: Two cores (referred to as two-wire group), Three cores (referred to as two-wire group)
Conductor cross-section: 0.5, 0.75, 1.0, 1.5, 2.5
■ Technical parameters |
1. 20 ℃ conductor DC resistance and conductor structure
Nominal cross-section (mm2) |
Conductor structure (number/diameter of single wire mm) |
20 ℃ DC resistance ≤ (Ω/km) |
|||
Class A |
Class B |
Class R |
A. Class B |
Class R |
|
0.5 |
1/0.8 |
7/0.3 |
16/0.2 |
≤36.0 |
≤39.0 |
0. 75 |
1/0.97 |
7/0.37 |
24/0.2 |
≤24.5 |
≤26.0 |
1.0 |
1/1.13 |
7/0.43 |
32/0.2 |
≤18.1 |
≤19.5 |
1.5 |
1/1.38 |
7/0.52 |
30/0.25 |
≤12.1 |
≤13.3 |
2.5 |
1/1.78 |
7/0.68 |
49/0.25 |
≤7.41 |
≤7.98 |
2. Insulation resistance at 20 ℃
performance project |
PVC insulation |
PE, XLPE insulation |
Insulation resistance M Ω at 20 ℃ KM |
≥25 |
≥500 |
3. The cable should undergo a power frequency AC voltage test: 2000V/1min insulation without breakdown, and the test temperature is ambient temperature.
4. Working capacitance (1KHZ): Core to core ≤ 90PF/m
5. Distributed capacitance (1KHZ) ≤ 0.6 μ H/m
6. Electromagnetic interference induced voltage (interference magnetic field 400A/m) ≤ 5mV
7. Static induced voltage (static voltage 20KV) ＜ 1V
8. Radiation field penetration intensity (interference field strength 120dB μ V, interference field frequency 200MHz) ≤ dB μ V