YFFBJ Shielded Flat Elevator Cable
An elevator stalled between floors because of a corrupted encoder signal is a liability. Not a minor service call. A single intermittent fault caused by electromagnetic interference in the traveling cable can trigger emergency braking, strand passengers, and expose your company to regulatory fines and callback costs. The YFFBJ shielded flat elevator cable removes that risk. Its engineered shield and flat geometry deliver clean power and control data to VVVF drives, fitting into narrow hoistways without compromising bend life. This means fewer field failures and predictable long-term performance.
Why Production Engineers Standardize on the YFFBJ Cable
Shielded Signal Integrity
[Feature]: Aluminum/polyester foil bonded to a tinned copper braid with ≥85% nominal coverage.
[Advantage]: Creates a low-impedance path to ground for common-mode noise radiated by variable frequency motors.
[Benefit]: Decisive, fault-free encoder feedback. No dropped floor calls or controller resets due to EMI.
Flat Architecture for Tight Hoistways
[Feature]: Parallel core arrangement in a compact flat profile.
[Advantage]: Bend radius up to 30% thinner than a round cable of equivalent conductor count.
[Benefit]: Clears building steel, shallow cable trays, and multiple-car installations. Reduces conflict during retrofits and saves shaft cross-section.
Integrated Steel Wire Strength Member
[Feature]: Galvanized steel support strands embedded at the cable edges.
[Advantage]: Carries the cable’s self-weight and limits tensile strain on copper conductors during long vertical travels.
[Benefit]: Stable core impedance over 150+ meters. Longer replacement cycles. Lower total lifecycle expense for high-rise buildings and mine hoists.
Cold Flexibility and Mechanical Endurance
[Feature]: Special elastomer or PVC compound jacket, extruded directly over the shield.
[Advantage]: Ductile at −15°C without cracking; withstands >3 million dry bending cycles in lab testing.
[Benefit]: Stays flexible in unheated elevator shafts and arctic logistics lifts. Scheduled downtime for cable replacement can be extended significantly.
Custom Power‑Data Hybrid Configuration
[Feature]: Conductors from 0.5 mm² to 25 mm², plus shielded twisted pairs for CAN/RS‑485 within a single flat element.
[Advantage]: One cable carries motor power, brake wiring, door sensors, and high-speed communication.
[Benefit]: Cuts connection points in the traveling loop. Fewer junction boxes, fewer fault sources. Simpler BOM for your installation.
Technical Specifications and Composition
| Parameter | Specification |
|---|---|
| Cable Designation | YFFBJ (shielded flat elevator traveling cable) |
| Conductor Material | Bare annealed copper, Class 5 flexible stranding per IEC 60228 |
| Core Insulation | Special PVC or rubber compound (identification per HD 308) |
| Shielding | 1. Aluminum/polyester tape, overlap ≥25% 2. Tinned copper braid, nominal coverage ≥85% |
| Inner/Outer Sheath | Black, flame-retardant PVC or elastomer compound (RAL 9005 or per order) |
| Support Element | Galvanized steel wire strands (optional, required for travel heights above 30 m) |
| Rated Voltage (U₀/U) | 300/500 V (control and power circuits) |
| Test Voltage | 2500 V AC / 5 min (core to core, core to shield) |
| Temperature Range – Moving | −15 °C to +60 °C (peak: +70 °C, duration limited) |
| Temperature Range – Fixed | −30 °C to +70 °C |
| Minimum Bending Radius | 10 × cable thickness (traveling); 6 × thickness (fixed) |
| Maximum Travel Height | Consult factory (steel wire configuration validated per project) |
| Available Core Cross‑Sections | 0.5 mm² to 25 mm² |
| Available Core Counts | 2 to 36 cores (power, signal, twisted‑pair combinations) |
| Flame Retardance | IEC 60332‑1‑2 (single cable) |
| Oil and Chemical Resistance | Good resistance to hydraulic oils and light cleaning agents |
Industry Applications and Scenario Validation
- High‑Rise Passenger Elevators (Commercial & Residential): Shielded flat construction preserves encoder signal timing, enabling VVVF drives to meet precise floor‑leveling tolerance and passenger comfort targets.
- Freight Elevators and Car Lifts: High conductor cross‑sections handle starting currents of heavy machinery; flat shape avoids interference with guide rails and door gear in tight loading shafts.
- Mine Shaft Hoists and Inclined Trams: Flame‑retardant jacket and steel strength member meet mine‑site safety scrutiny. Shielding blocks drive‑generated interference that could trip safety PLCs underground.
- Stage and Orchestra Pit Lifts: Silent flexing and a minimum loop diameter eliminate acoustic nuisance. The flat cable tucks into narrow pits without fouling scenery mechanics.
- Crane and Gantry Mobile Power Feeds: Shielded control pairs maintain stable communication between moving trolley PLCs and central drives in EMC‑noisy steel mill or container yard environments.
- Industrial Maintenance Platforms and Scissor Lifts: Repeated coiling and exposure to cutting oils demand a jacket with high abrasion resistance. Flat construction stacks neatly into moving cable chain guides.
International Compliance and QA Standards
- ✅ Conductor design to IEC 60228, Class 5
- ✅ Flame retardance test to IEC 60332‑1‑2
- ✅ Flat flexible cable testing to EN 50214 (reference)
- ✅ CE marked under Low Voltage Directive 2014/35/EU
- ✅ RoHS compliant (2011/65/EU, including Delegated Directive 2015/863)
- ✅ Manufactured under an ISO 9001:2015 certified quality system
- ✅ Full environmental test reports available: cold bend, hot pressure, ozone resistance
- ✅ Optional: project‑specific certification packs (UL, CSA, EAC) upon request
FAQ
How do I select the right steel wire configuration for a travel height above 200 meters?
We calculate tensile loads based on your vertical travel and cable weight per meter. For extreme heights, multiple steel wire strands are placed at the cable edges, and intermediate suspension points are defined. You receive a signed mechanical calculation sheet before production. No trial‑and‑error.
Can the YFFBJ cable be supplied with halogen‑free jacket and insulation for public transit or tunnel applications?
Yes. We substitute the standard PVC compound with a thermoplastic halogen‑free material that meets IEC 60754‑2 and IEC 61034‑2 smoke density limits. Oxygen index, corrosion acidity, and smoke transmittance values are included in the pre‑production sample report. Minimum order quantities may apply.
How do you verify the cable can sustain 3 million bending cycles, and what tolerance band applies?
We run a representative sample in a vertical bending test rig following the guidelines of EN 50214 annex B — alternating flexing over pulleys under mechanical load. The acceptance criterion is no conductor breakage and ≤2% increase in DC resistance after 3 million cycles. Test video and certified report accompany each project batch when specified in the order.
Specification Review and Quotation
Engineering decisions about traveling cables carry disproportionate cost weight. A cable that fails early rewrites your maintenance budget. Send us your shaft layout, travel height, and EMC environment. We return a datasheet with the exact bending radius, termination schematic, and a delivery schedule matched to your installation phasing. You will have a technical answer, not a catalog pitch.
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