We can provide samples, and if the product value is low, we can send samples for free; If the value and price of the product are high, producing samples also requires a significant cost, which would already require payment.

Pre treatment before installation: 

① Preheat the cable (using a hot air gun, temperature 50-60 ℃, for 10-15 minutes to avoid local overheating); 

② The minimum bending radius during laying must be ≥ 10 times the outer diameter of the cable (static laying) or 15 times (dynamic laying), and "dead bending" (bending angle>90 °) is prohibited; 

③ Adopting a toothless cable pulley (to avoid scratching the insulation), the traction force is controlled within 15% of the conductor fracture strength. If it has cracked, the damaged section needs to be cut off and a new joint needs to be made (using a flared connector to avoid insulation stress during tightening).

Key troubleshooting points: 

① The roundness of the inner conductor (Z0 fluctuation when tolerance>± 0.01mm) needs to be monitored online with a laser caliper (roundness ≤ 0.005mm); 

② Insulation medium concentricity (uneven field strength distribution when eccentricity>5%), adjust extrusion die concentricity (error ≤ 2%); 

③ The welding quality of the outer conductor (impedance mutation caused by virtual welding) is achieved by argon arc welding (welding current 8-12A, speed 15-20 m/min), followed by eddy current testing after welding;

④ The tension fluctuation of the cable (causing tensile deformation of the insulation layer) is controlled by a constant tension control system (tension fluctuation ≤± 2%). After debugging, use a network analyzer (8753ES) to scan and test VSWR across the entire frequency range (0.1~26.5GHz).

Main factors:

① Material procurement cycle (special materials such as polyimide film require 4-6 weeks); 

② Process complexity (such as customized tooling for laser wire stripping and multi-core twisting); 

③ Test items (such as high and low temperature cycle testing, which takes 1-2 weeks).

 

Measures taken to shorten delivery time: 

① Lock in commonly used material inventory in advance (such as copper conductors, conventional insulation materials); ② Adopting modular design (such as standardized shielding structure); 

③ Parallel sample testing and material procurement (after customer confirmation of the plan); 

④ Simplify non critical testing (such as routine performance that has been verified by customers can be exempted from inspection).

Key parameters to be supplemented: 

① Electrical performance (rated voltage AC 3kV/DC 5kV, insulation resistance ≥ 100M Ω· km); 

② Mechanical properties (dynamic tensile strength ≥ 50kN, bending life ≥ 10 ⁴ times @ bending radius 10 × OD); 

③ Environmental parameters (working temperature -20~60 ℃, seawater salinity 3.5%, resistance to microbial corrosion); ④ Special functions (whether to integrate fiber optic sensing and buoyancy adjustment requirements). Suggest providing the equipment operation depth curve (including instantaneous impact pressure) and designing the armor layer (316L stainless steel wire, diameter 3mm, Z-type lock armor structure) according to API 17E standard.

The customer needs to provide: 

① Application scenarios (such as aviation engine compartments/deep-sea exploration equipment); 

② Electrical parameters (rated voltage (AC/DC), current, signal type (analog/digital), impedance, transmission frequency); ③ Environmental parameters (temperature range, humidity, corrosive media (oil/chemical corrosion), electromagnetic interference intensity; 

④ Mechanical properties (bending radius (static/dynamic), wear resistance, tensile strength); 

⑤ Structural requirements (number/diameter of conductor strands, insulation/sheath material grade, shielding method (weaving/winding/foil), color/printing, minimum bending radius); 

⑥ Installation method: fixed laying/mobile drag chain, buried/overhead/underwater;

⑦ Certification requirements (compliance with industry standards such as UL/CE/CCC/EN); 

⑧ Testing standards (such as withstand voltage test, insulation resistance test, combustion test).

Adopting a "layered protection" structure:
① Conductor: high-purity oxygen free copper (OFHC) or aluminum alloy, ensuring low resistance and corrosion resistance;
② Insulation layer: high-density polyethylene (HDPE) or cross-linked polyethylene (XLPE), with water pressure resistance greater than 100MPa (corresponding to 10000m deep sea);
③ Shielding layer: lead alloy sheath (anti seawater penetration)+copper tape wrapping (anti electrochemical corrosion);
④ Buffer layer: asphalt+polypropylene rope, absorbing mechanical impact during laying;
⑤ Armor layer: double-layer galvanized steel wire (shallow sea) or stainless steel strip (deep sea), tensile strength>2000N/mm ²;
⑥ Outer sheath: high-density polypropylene (PP), resistant to marine organism adhesion and UV aging.

 

Strengthen the "radial + axial" dual sealing: 
① Radial sealing: Extrude hot-melt adhesive (melting point 80~100°C) between the insulation layer and inner sheath, and wrap (water-swelling ratio ≥300%). 
② Axial sealing: Fill the conductor strands gaps with butyl rubber sealing compound (viscosity 50,000~80,000 mPa·s), and wrap steel armor after cabling (overlap rate ≥25%). 
③ Dynamic sealing: Use a combination of "O-ring (fluororubber) + wedge-shaped sealing component" at the connector, with a compression rate controlled at 20%~30%.  The insulation resistance must meet ≥500MΩ after passing the immersion test (1000m depth × 24h).

 

Waterproof cable: A specialized cable designed to operate in wet, submerged, or high-pressure deep-sea environments. It features excellent waterproof sealing, corrosion resistance, stable electrical transmission, and electromagnetic interference resistance. Typically composed of three parts—a conductor, a sheath, and an insulating layer—it supplies power and signal control to underwater robots and holds broad application prospects in fields such as underwater communication, offshore oil and gas extraction, and ocean observation.
 

R1: "Rivers and Lakes" must be translated as "Rivers and Lakes"  Undersea cables: Primarily used for power transmission or communication connections in underwater environments such as beneath the seabed, rivers, and lakes. They can be categorized into power cables, communication cables, or optically powered composite cables, with structures and performance designed to meet requirements such as long-distance laying, deep-sea high pressure, and high-capacity transmission.
 

Summary: The two have different application scenarios and design requirements.

Nuclear fusion cable is one of the key technologies supporting the operation of controllable nuclear fusion devices, mainly used for power transmission and magnetic confinement systems of fusion devices.
 

It can be divided into superconducting cables and high-temperature superconducting cables. The TF (circumferential field) and PF (polar field) superconducting cables in tokamak devices provide stable power transmission for strong magnetic field confinement. The fusion reactor power generation system achieves efficient energy transmission from the fusion reactor to the power grid, reduces losses, and improves energy utilization efficiency.

 

The design must adopt a "full shielding + magnetic isolation" approach:  ① Inner shielding uses silver-plated copper tape (overlap rate ≥90%) + outer shielding employs high-permeability permalloy tape (μ≥8000) to form a magnetic shielding cavity;  ② The cable adopts a twisted pair structure (pitch 5~10mm) to reduce loop area (≤0.1cm²) and minimize flux coupling;  ③ Connectors at both ends use non-magnetic materials (titanium alloy housing) to avoid eddy current formation;  ④ The shielding layer employs "multiple-point grounding" (spacing ≤1m) with a grounding resistance ≤0.5Ω.  S-parameter testing (S21<-80dB@1MHz) must be conducted to ensure shielding effectiveness.

 

Material: Insulation layer thickness meets standards (±0.1mm), shielding coverage ≥85% (braided shielding).
 

Test Report: Thermal Cycling (-40°C~150°C, 1000 cycles without cracking), Insulation Resistance (≥100MΩ·km).
 

Appearance: Clear markings (model/specification/certification), no bulges/scratches.

Certification: Whether it has passed authoritative certifications such as UL (USA), CE (EU), and CCC (China).