Слово встречается в следующем контексте: Improving The Lightning Performance of Overhead Lines Applying Additional Underbuilt Shield Wire

Заранее спасибо

++
вот тут есть пример употребления

http://ewh.ieee.org/soc/pes/lpdl/archive/short.pdf

Example: 15-kV Circuit Underbuilt on a Pole with a 69-kV Circuit Above
Problem: Excessive outages have been occurring on a circuit with 10 km of 12.47-kV distribution line
mains built under a 69-kV circuit.
...
Direct stroke flashovers. Because the line is underbuilt, the shield wire on the 69-kV circuit provides a
shield wire for the 12.47-kV circuit too.