- CABLE CONSTRUCTION
- Conductor: The conductors shall be solid , annealed and bare copper with a diameter of AWG24 and minimum acceptable diameter shall be 0.485mm.
Insulation: Each conductor shall be insulated with solid high density polyethylene. The insulation shall be uniform and shall not have any defects. The diameter over the insulation shall be maximum 1.22mm.
Screen: The aluminum tape coated on one side with plastic film shall be applied over the cable core for screening on jacketing process. A tinned copper wire with the diameter of 0.4mm shall be applied with cable core in jacket.
Sheath: The flame retardant PVC or LSZH(Low Smoke Zero Halogen) compound colored grey or other colors shall be applied over the screening.
- ELECTRICAL PERFORMANCE
-
Characteristics Units Specification DC Resistance Ω/100m ≤ 9.5 DC Resistance Unbalance % ≤ 2.00 Capacitance Unbalance
(Pair to Ground)pF/km
(800~1000Hz)≤ 1600 Insulation Resistance MΩ-100m ≥ 5000 Dielectric Strength DC kV/sec 2.5 / 2 Impedance (Characteristic mean)
Ω 100 ± 5% (at 100MHz) Return Loss dB/100m ≥ 20 + 5 * log(freq) , 4 ≤ f < 10MHz
≥ 25 , 10 ≤ f < 20MHz
≥ 25 – 7 * log(freq/20) , 20 ≤ f ≤ 100MHzAttenuation
(Insertion Loss)dB/100m ≤ 1.967*√(freq) + 0.023*(freq) + 0.1/√(freq)
, 4 ~ 100 MHzNEXT Loss dB/100m ≥ 65.3 – 15*log(freq) ,4 ~ 100MHz Power sum NEXT Loss dB/100m ≥ 62.3 – 15*log(freq) ,4 ~ 100MHz ELFEXT Loss dB/100m ≥ 64 – 20*log(freq) ,4 ~ 100MHz Power sum ELFEXT Loss dB/100m ≥ 61 – 20*log(freq) ,4 ~ 100MHz Propagation Delay dB/100m ≤ 534 + 36 / √ (Freq) ,4 ~ 100MHz Propagation Delay Skew dB/100m ≤ 45, 4~100MHz
- FLAME REQUIREMENTS
- A cable marked “IEC 60332-1” or “CMX” shall meet the VW-1 flame test specified in IEC 60332-1.
A cable marked “IEC 60332-3” or “CM” shall meet the vertical flame test specified in IEC 60332-3.