bushings de gran distancia de fuga

[kgordnian]

Could anybody translate the following sentence from Spanish to English:

SE REQUIEREN BUSHINGS DE ALTA TENSION DE GRAN DISTANCIA DE FUGA, DEBIDO A CONTAMINACION DE CEMENTO.

 

[Sprachliebhaber]

"High-voltage bushings (insulators) having a long leakage path are necessary because of contamination of the cement."