TRANSTECTOR's I2R-75KH480 240/480 VAC, four-pole, three-phase delta high-leg, five-wire surge protective device (SPD). Network safety and reliability are built into the I2R 75K series for industrial applications. The I2R-75KH480 provides four-pole, three-phase delta high-leg, five-wire surge protection with a nominal discharge current of 10 kA. Through superior design, each I2R combines a robust 75 kA surge capacity that also eliminates back-up fusing requirements thus providing network operators with a quick to install, safe, and reliable product set for AC network surge protection.