PowerClamp Transient Voltage Surge Suppressors (TVSS) by Sine Control International provide the ultimate protection against massive high energy surges, spikes, noise and distortion on the AC powerline. These PowerClamp TVSS units are designed specifically for broadcast applications. They are ideal for installation at transmitter sites where massive power surges and lightning-induced transients are a major cause of transmitter unreliability and damage. PowerClamp units will drastically reduce tripped breakers, transmitter shutdowns, and prevent or minimize damage to transmitting equipment caused by such power surges. See More info at bottom for manufacturer specifications. This model is 150,000 amp rating, 120/240 volt 1ø.