Attributes . Cooper Power Systems Storm Trapper H.E. (High Energy), low-voltage distribution-class surge arresters are designed to provide surge protection at distribution transformer secondary bushings. The Storm Trapper H.E. arrester is the industry's first low-voltage distribution-class arrester and has successfully passed all design tests for light duty distribution class arresters per IEEE Std C62.11(TM) -1993 standard. Years of research by Cooper Power Systems in low-voltage secondary circuits concluded that the . Names