Special Cables & Grounding Wire
Drag-chain flexible cable and through-type grounding wire
Drag-chain cable for continuous flexing on moving machinery, and through-type grounding wire for railway and plant earthing.
- Bending life ≥ 5,000,000 cycles
- Unshielded, braided and twisted screened
- S-DH grounding wire, 35 and 70 mm²
- Oil, water and abrasion resistant
Overview
Special Cables & Grounding Wire from YSN
Two very different duties sit in this family. Drag-chain cable is built for continuous reciprocating movement: super-fine copper strands, a special PVC compound and an anti-kink lay-up that survives millions of bending cycles on cranes, machine tools, robots and conveyor systems. Through-type grounding wire is the opposite kind of product: a soft copper conductor inside a seamless alloy sheath, laid along both cable troughs of a railway so that every structure and every item of equipment along the line sits at the same potential.
What we supply
- Drag-chain control and power cable, unshielded and screened
- Oil, water, abrasion and UV resistant compounds
- Through-type grounding wire for rail and industrial plants
- Made to drawing, with sample approval before batch production
Drag-chain flexible cable
For continuous flexing
Flex-rated control and power cable for drag chains, moving machinery and robotics, supplied unshielded, braided screened or with screened twisted pairs.
- Conductor
- Multi-strand super-fine bare copper, class 6 (IEC)
- Insulation
- Special PVC compound
- Lay-up
- Anti-kink layered and grouped assembly
- Screen
- Unshielded; tinned copper braid; or twisted pairs with individual screen
- Sheath
- Special PVC compound
- Rated voltage
- 300/300 V up to 0.5 mm², 300/500 V above 0.5 mm²; screened types 300/300 V
- Test voltage
- 2,000 V for 5 min; on screened cable 2,000 V core to core and 1,000 V core to screen
- Travel speed
- Up to 5 m/s unshielded, up to 3 m/s screened
- Acceleration
- Up to 20 m/s² unshielded, up to 15 m/s² screened
- Bending life
- ≥ 5,000,000 cycles, over a travel length of 50 m or less
- Bending radius
- Fixed 5 × D; moving 8–10 × D unshielded, 10–12 × D screened
- Temperature range
- Fixed −30 °C to +80 °C; moving −20 °C to +80 °C
- Flame retardancy
- IEC 60332-1-2 and EN 60332-1-2
- Resistance
- Oil resistant and chemically stable, to the compound tables issued with the datasheet
Selection
Representative constructions
| Cores × mm² | Outer diameter (mm) | Weight (kg/km) | Screened: outer diameter (mm) | Screened: weight (kg/km) |
|---|---|---|---|---|
| 2 × 0.20 | 4.6 | 29 | 4.9 | 37 |
| 3 × 0.20 | 4.8 | 34 | 5.0 | 42 |
| 4 × 0.20 | 5.1 | 40 | 5.4 | 50 |
| 6 × 0.20 | 6.0 | 57 | 6.3 | 68 |
| 4 × 0.30 | 5.8 | 52 | 6.1 | 63 |
| 6 × 0.30 | 6.8 | 75 | 7.2 | 88 |
| 5 × 0.75 | 7.9 | 106 | 11.7 | 121 |
| 4 × 1.0 | 8.2 | 112 | 8.5 | 128 |
| 7 × 1.0 | 10.6 | 196 | 11.0 | 216 |
| 4 × 1.5 | 9.8 | 161 | 10.2 | 181 |
| 6 × 1.5 | 11.9 | 242 | 12.2 | 264 |
| 10 × 1.5 | 16.2 | 445 | 16.6 | 479 |
Representative sizes from a range that covers 0.14–2.5 mm² and 2–38 cores. Twisted-pair screened types of 2 to 9 pairs, and other constructions, are made on request.
Through-type grounding wire
S-DH grounding wire for railway earthing
A soft copper conductor in a seamless corrosion-resistant alloy sheath, laid along both cable troughs of a railway and bonded to the signalling, communications, traction and power equipment along the line.
- Application
- Integrated earthing for railway systems, and plant or equipment earthing where a buried conductor has to last
- Conductor
- Class TR soft annealed copper wire to GB/T 3953; resistivity ≤ 0.017241 Ω·mm²/m at 20 °C; elongation ≥ 25%
- Sheath
- Seamless, corrosion-resistant alloy sheath closed tightly over the conductor, suited to aggressive soils
- Sizes
- 35 mm² and 70 mm²
- Ambient temperature
- −40 °C to +70 °C; laying temperature not below −10 °C
- Bending radius
- Not less than 15 × the outer diameter
Construction
S-DH dimensions
| Size (mm²) | Conductor cross-section (mm²) | Conductor diameter (mm) | Wires | Sheath thickness average / min. (mm) | Max. outer diameter (mm) | Weight (kg/km) |
|---|---|---|---|---|---|---|
| 35 | 25 | 2.20 | 7 | ≥ 1.0 / ≥ 0.95 | 8.5 | 423 |
| 70 | 60 | 2.10 | 19 | ≥ 1.0 / ≥ 0.95 | 12.3 | 840 |
Performance
S-DH electrical and mechanical data
| Size (mm²) | DC resistance at 20 °C (Ω/km) | Breaking force (kN) | Elongation at break (%) |
|---|---|---|---|
| 35 | ≤ 0.590 | ≥ 12.0 | ≥ 35 |
| 70 | ≤ 0.270 | ≥ 25.0 | ≥ 35 |
Why this product
What it gives the project
Built for movement
Super-fine class 6 strands and an anti-kink lay-up are what let the cable take millions of bending cycles instead of a few thousand.
Screened where it matters
Braided screen, or screened twisted pairs, keep drives and encoders quiet on the same drag chain.
Earthing that lasts
The seamless alloy sheath on the S-DH grounding wire protects the copper from the soil, which is why it is specified into railway troughs.
Made to the route
Lengths, cores and compounds are made to the drawing, with a sample approved before the batch runs.
Tell us the movement
Bending cycles, travel length, speed and the oil or coolant the cable meets decide the construction. Send those four numbers and we will return the cable, the screen and the length for the chain.
Ask for a drag-chain selection
Send us the load and the route
Tell us the current, voltage, route length and laying method. You will have a specification, a drawing and a price within one working day.