|
Item |
Test
Methods |
Requirements |
|
Stress-strain |
The tension is increased to the max.
allowable working tension step by step. |
The fiber shall not show any strain. The sheath
shall not show any damages. |
|
Crush |
Load force:≥2200N/10cm |
The fiber shall not show any induced attenuation.
The sheath shall not show any damages. |
|
Impact |
Hammer weight: 450g
Drop height of hammer: 1m
Impact: at least 5 times |
The fiber shall not show any induced attenuation.
The sheath shall not show any damages. |
|
Repeated bending |
Mandrel radius: 20D
Load force: 150 N |
The fiber shall not show any induced attenuation.
The sheath shall not show any damages. |
|
Torsion |
Axial strain: 150 N
Torsion length: 1m
Torsion angle: ±180˚
Torsion: 10 times |
The fiber shall not show any induced attenuation.
The sheath shall not show any damages. |
|
Temperature cycle |
-40˚C−+60˚C |
The fiber attenuation shows any no changes. |
|
Thermal aging |
After the temperature cycling test,
85˚C, 120 hours |
The fiber attenuation shows any no changes. |
|
Water ingress |
1m sample, 24 hours |
No water penetrates. |
|
Electrical |
Salt water flow rate: 0.4±0.1
l/h
Droplet size: 5−20 µm
Temperature: 15−25˚C
NaCl content of water: 10±0.5kg/m³
Test voltage: 25kV
Frequency: 625mm
Duration: 1000 hours |
Erosion at any point on the sheath surface shall not
exceed 50% of the sheath thickness. |
|
Aeolian vibration |
Active span: >20 m
Tension: 20% RTS
Vibration cycles: 10 times |
The induced attenuation shall not exceed 1.0dB/km at
1550 nm for SM fibers. |
|
Sheave |
Deflection angel: 70˚
Cable moving distance: 4m
Number of passes: 120 |
The induced attenuation shall not exceed 1.0dB/km at
1550 nm for SM fibers.
The cable shall not show any surface damages. |
|
Galloping |
Test Tensions:≤5kN
Galloping: 10 cycles |
The induced attenuation shall not exceed 1.0dB/km at
1550 nm for SM fibers.
The cable shall not show any surface damages. |
|
Creep |
Effective test length: 10m
Load: 20% RTS
Duration: 1000 hours |
The fiber attenuation shows any no changes.
The cable shall not show any surface damages. |