Use simultaneous bundle stringing methods, matched-length subconductors, and matched tension across subconductors to avoid differential sag. Multi-roller fairleads, synchronized payout and controlled tensioning systems are required for consistent results. Follow bundle manufacturer instructions.

Drones near powerlines face RF interference, wind gusts, and collision risk. Mitigate with certified pilots, safety corridors, tethering/backup, and maintain safe distances unless specifically operating as a pilot-line mission with approved procedures and safeguards. Have an emergency retrieval plan.

Plan transport for heavy equipment (road/sea permits), staging areas, local labor, spare parts, and on-site commissioning. Factor in weather windows, helicopter or drone permits, and contingency for component delays. Use modular equipment that’s easy to transport and assemble in the field.

HTLS/ACCC, ADSS, and fiber-optic OPGW require particular groove profiles, larger diameters, and non-damaging roller surfaces to prevent strand deformation or fiber crush. Use manufacturer-recommended sheaves and multi-roller fairleads for special conductors.

Drone pilots must hold required local certifications (e.g., FAA Part 107 in US) and receive utility-specific training on operations near energized lines, rope-handling procedures, emergency recovery and crew coordination. Ground crews must train on drone safety zones and rope secures.

Use laser range tools, precision sag-meters, or differential GPS and measure under set conductor tensions and temperatures. Apply conductor-specific sag tables and measure at reference temperatures. For highest accuracy, perform final sag checks after tension set and temperature stabilization.

Use dedicated OPGW grips, controlled tensioning, and intermediate support where needed. Avoid exceeding manufacturer tensile and bend-radius limits, and use fiber-compatible rollers and sheaves; document fiber installation test results. Consider staged pulls for very long spans.

Use correct sheave sizes, CTCS (constant tension), proper payout-stand braking, smooth fairleads, and avoid abrupt accelerations. Ensure sheaves are clean and matches groove profile; use conductor-protecting grips and follow the conductor manufacturer’s installation guidelines.

Request CE and ISO certificates, factory test reports (load tests), material certificates, and FAT documentation. For electrical/electronic controls confirm RoHS/EMC compliance if required. We support third-party inspection and will include certificate packages per customer needs.

High altitude, extreme heat, cold or corrosive coastal conditions require specific cooling, materials and seals. Wind and icing impact drone use and helicopter operations. Select units with appropriate material coatings, hydraulic ratings and temperature-tolerant components for reliable performance.

Provide conductor type and datasheet, longest span, typical span lengths, required stringing tension, project altitude/climate, desired remote-control features, and estimated annual usage. Include delivery port and required certifications so we can give an accurate quote.

Reconditioned machines can be cost-effective if professionally refurbished, load-tested, and supplied with test reports and limited warranties. For mission-critical high-voltage work, new machines provide longer service life and manufacturer warranty. We sell both new and certified reconditioned units with documentation.

Bullwheel pullers provide controlled pulling via large friction wheels (good for heavy conductors and long pulls), while capstan winches offer flexible line-handling for lighter duties. Bullwheels handle higher continuous loads; choose based on conductor size, pull length and rope type (synthetic vs wire).

Store sheaves clean, dry and protected from impact; wrap or crate to avoid nicks. During transport secure against shock and vibration; pack grooves so they don’t rub on other hardware. Keep a log of serials and manufacturer inspection dates. Proper storage extends life and prevents failure in the field.

Lead times depend on model availability and stock levels — typical ranges are 2–12+ weeks for manufacturing plus transit time. Sea freight is economical for heavy units, air for urgent parts. Confirm current lead times in your RFQ as logistics and component availability remain variable.

Essential spares include spare sheaves, bearings, keeper pins, hydraulic filters, hoses, seals, spare ropes/straps, and a dynamometer calibration check kit. Customize the kit per the machine model and local shipping lead times. We offer pre-packed rapid-response spare kits for global shipping.

Follow manufacturer recommendations — inspect daily before use, perform monthly lubrication and quarterly hydraulic/system checks, and annual comprehensive inspection including load testing. Keep maintenance logs and stock critical spares (seals, bearings, hydraulic filters) to prevent downtime. Maintenance intervals vary with usage intensity.

Live-line work requires specialized insulated tools and certified live-line crews. Most heavy tensioning is done de-energized and grounded. If live-line methods are required, request our insulated tool options and hot-stick-compatible accessories and ensure compliance with local live-line regulations and training requirements.

Machines are factory load-tested and come with test reports, CE/ISO documentation where applicable, and operation manuals. We also support third-party FAT inspections and provide calibration/certificates for dynamometers on request. Provide purchase order details and we’ll include the required certification package.

Rent if you have intermittent projects or need to trial equipment; buy if utilization is high enough to justify capex, and you have maintenance capability. Consider financing, downtime risk, spares access, and total cost of ownership. We offer purchase, leasing and short/long-term rental options to match project needs.