FAQ

FAQ

What temporary grounding and earthing practices are required during stringing?+
Short answer: Always follow local standards and adopt temporary grounding sets to dissipate induced/residual voltages; ensure crews are trained in grounding protocols before work begins. Grounding procedures differ by region and must match local regulation and utility practice.
Which legal/regulatory standards should I check in the US and EU?+
Short answer: In the US check OSHA standards for overhead lines (e.g., 1926.964 for load ratings and safe condition of pulling/tensioning equipment). In the EU check applicable national electrical safety/regulatory codes and EN standards for lifting/rigging. Always confirm local regulations before deployment.
What are typical delivery lead times and shipping options from China in 2025?+

  • Short answer: Lead times vary by model and stock (2–12+ weeks). Air for urgent spares, sea (FOB/CIF) for heavy equipment. Confirm current lead times at RFQ stage because global logistics remain variable.

  • Do you provide on-site commissioning, operator training and spare parts?
    Short answer: Yes — we offer on-site commissioning and operator training packages, spare parts kits and worldwide shipment of critical spares. Training reduces operational risk and downtime.

    • How often should stringing blocks, sheaves and hardware be inspected?+
    Short answer: Inspect before each job and on a scheduled basis. Visual inspection for cracks, sheave wear, keeper pins, ball-pin locks, and lubrication is critical; replace worn sheaves or cracked frames before use. Follow manufacturer and industry checklists.
    How do I choose a tensioner/puller capacity for a given voltage and conductor?+
    Short answer: Base selection on conductor weight/diameter, target stringing tension (kN), span length and environmental loading. Provide conductor type (ACSR/OPGW/ADSS), span data and desired sag — we’ll specify the correct model.
    What is best practice for cable lubrication during long duct pulls?+

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    Can your equipment be used on energized/live lines?+

    Short answer: Live-line work requires specialized hot-stick rated tools, insulated rigs and qualified live-line crews. Most heavy tensioning is done de-energized and grounded—consult utility protocols. If live-line methods are required, request our insulated tool and hot-stick compatible product options.

    What is best practice for cable lubrication during long duct pulls?+
    Short answer: Use a compatible cable pulling lubricant applied per cable vendor and lubricant manufacturer instructions to reduce capstan friction and pulling tension. Choose lubricants rated for the cable jacket material and duct type.
    What testing and certification do your machines have?+
    Short answer: Our equipment is factory-tested (load testing and performance checks) and we can provide test reports; CE/ISO paperwork available on request. For export, we support third-party inspections and FAT (factory acceptance tests).
    When should designers choose ducting vs direct burial for underground cables?+
    Short answer: Choose ducting when future upgrades, easier repairs, and staged fiber/power installations are anticipated. Direct burial may be more economical short-term but is less flexible for future capacity increases. See local utilities’ civil design standards.
    After-sales, warranty & refurbishment+

  • What is your warranty and global spare-parts support?
    Short answer: Standard warranty covers manufacturing defects; we also offer extended warranty and spare parts logistics. We maintain parts stock and can ship prioritized spare kits globally.

  • Do you sell refurbished/used stringing machines?
    Short answer: We provide reconditioned units in some cases — rework, test reports, and limited warranty included. New machines are recommended for mission-critical high-voltage projects.

    • How to estimate safe pulling tension for long HV cable pulls?+
    Short answer: Calculate based on cable type, duct inner diameter, lubricant coefficient, total pull length, and number of bends — use manufacturer pulling tables or dedicated pulling calculators. When in doubt, stage reels and use intermediate winches/reels to reduce tension.
    When should projects consider undergrounding lines instead of overhead?+
    Short answer: Consider undergrounding for urban corridors, environmental constraints, or reliability objectives. However, undergrounding is more expensive per km and has different maintenance/repair profiles — do a lifecycle and environmental impact analysis.
    Rent or buy: which is better for stringing equipment?+
    Short answer: Rent for infrequent projects or to test equipment; buy if you have consistent volume and can justify capex + maintenance. Consider financing, maintenance capacity, and residual value when deciding.
    How are climate resilience and HTLS conductors changing stringing needs?+
    Short answer: HTLS conductors raise temperature/tension requirements — choose tensioners and sheaves compatible with higher operating temps and reduced sag targets. Also plan for increased inspection after extreme weather.
    Q: Can drones carry pilot lines for transmission stringing?+
    A: Yes — drones are used for pilot-line deployment in difficult terrain but are limited by payload, wind and local aviation rules; they are best used alongside conventional stringing tools for the main conductor pull.
    Q: What inspections should I perform on stringing blocks before each job?+
    A: Inspect sheaves for cracks/wear, check side frames for deformation, verify keeper pins/ball-pins, test swivel operation and ensure lubrication; replace any worn parts before use.
    Q: What are the recommended cable pulling lubricants for XLPE cables?+
    A: Use a lubricant specified by the cable or lubricant manufacturer compatible with XLPE jackets and duct materials; apply according to the lubricant’s instructions and vendor pulling tables.
    Q: Do you provide on-site commissioning and operator training?+
    A: Yes — we provide commissioning, operator training, and maintenance instruction packages to ensure safe and efficient equipment use.
    Q: What certifications and test reports come with your machines?+

    Q: What certifications and test reports come with your machines?

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