When a pole is judged to be marginally below the The pole is not a total reject, the area below the ground is treated withĪusplast® a special diffusing preservative which is both a fungicide and aīarrier against termites. Magnescope®, ground line treatment and reinforcement. Ground Line Maintenance of wood poles consists of pole inspection with the The supply of materials and services for the on-going maintenance of wood poles. Thermal Scanners for the differential determination of hot spots.Īusmose Pty.Spotting, sags & tensions and analysis of loads on structures.
PLS-CADD software for the design of transmission lines, optimum.Fault Indicators for overhead and underground lines.Laser Technology Impulse T&D to measure 3-dimensionalĭistances, tree heights, clearances and mapping.Real time rating is possible with this system. Transmission line, thus enabling the utilities to increase current flow on Catenary Assurance of Transmission (CAT) monitoring system whichĪllows utilities to accurately measure the various tensions and sags in a.Sonic cable height meters which enable utilities to measure the sag andĬurrent in cable spans on any transmission line. Transmission and distribution line hardware including a range ofĪutomatic splices and dead ends for conductors, earth wires.Composite insulators from the United States of America.
Porcelain disc, pin, shackle & guy insulators from the.Vibration Dampers of the stockbridge type for conductors diameterįrom 12mm to 40mm and OPGW manufactured in house.Transmission grid companies and power distribution authorities, and briefly its
In the main its customers are the various state electricity LIMITEDis involved in the manufacture, import and marketing of productsĪnd services to the electricity supply industry throughout Australia and New wereĬompanies belonging to the Dulmison Group in 1986.ĭulhunty Industries Pty. Limited, Modern Utilities and Dulmison Marine Pty Ltd. Philip Dulhunty, previous founder andĮxecutive Chairman of the Dulmison Group of Companies.Īusmose Pty. (Internal Links: Anchoring | A Vibration damper history| Dulhunty Industries| Reliable Insulators| SupaRule | Insulator stocks| LP LV drawing| Reel Insul. (External Links : PLS-CADD| Dulhunty Yangzhou| The Valley Group| Reliable Insulators| LaserTech| Bardin| CIGRE| Electricity Supply Association of Instead of de-rating an entire line, utilities can focus on specific spans and/or phases to return a transmission line to its desired operating temperature.The Dulhunty Group of companies consist of : This analysis method produces a clearer understanding of the potential problem areas when clearance and thermal rating reports are generated. Separating and classifying individual LiDAR phase hits of each transmission line dead-end section allows software such as PLS-CADD, a line design package from Power Line Systems, to perform FE calculations that match the catenary shape of the conductor at the time of survey for each span. Historically, cable sags are derived using ruling span calculations unfortunately, this doesn’t provide an actual representation of the entire line span for span, phase for phase. A Finite Element (FE) feature for matching individual cables inside the model to actual LiDAR points allows for a comprehensive analysis of the entire line. Conductor operating temperatures and weather events, as specified in national and local standards, are checked to the right of way for any detectable encroaching objects and vegetation in each span. The key objectives of LiDAR analysis include precisely determining the thermal rating of transmission lines and identifying encroaching objects to the phase conductors– e.g., overgrown vegetation contained within the limits of the transmission line right of way.įinite Element Applications.
Determining the exact maximum thermal operating limits of a transmission line with respect to minimum ground clearances permits efficient, cost-effective upgrade solutions with minimal social and environmental impact.
The data and imagery, combined with advanced modeling software, allows complete line verification and analysis. Both of these monumental tasks can be completed much more accurately and effectively with digital airborne light detection and ranging (LiDAR) data and orthorectified imagery. They’re also busily assembling up-to-date inventories of lines for geographic information system (GIS) and maintenance programs. Many electrical transmission line owners are studying the feasibility of upgrading their existing infrastructure.