Hertz Unit of measure of the frequency of alternating current. Impedance Similar to electrical resistance, since it is a measure of the opposition to the flow of electricity. Impedance is meaningful only for alternating current, and changes value as the frequency of the electricity changes. An electrical component which opposes the flow of electric current. An inductor has the property of impedance, the opposition to the flow of electric current.
Impedance changes value with the frequency of the applied electricity.
Interconnected Equipment Equipment which shares at least 1 common electrical connection other than the power wires. Joules A unit of energy, also known as watt-seconds. Some suppressors are rated in joules, meaning that if a surge exceeds the joule rating, the suppressor will likely be damaged. The joule rating of many suppressors deteriorates with use. An interconnection of computers, printers and other peripherals permitting the sharing of hardware and software resources.