I

I/O Input/Output

Input Line Cord The covered bundle of wiring connected to the input terminals of the UPS. The end of the cord not connected to the UPS is connected, via an input plug, to an AC utility outlet supplying power to the UPS.

Input Plug Connected to the end of the input line cord. To be plugged into an AC utility outlet receptacle.

Internal Bypass UPS circuitry which provides a redundant power path is referred to as an Internal Bypass. If there is an internal UPS fault, the connected load will still be supplied with unconditioned utility power.

Inverter An Inverter is a machine, device, or system that changes direct current (DC) power into alternating current (AC) power.

Isolation The separation - often through the use of an isolation transformer - of one section of a system in order to avoid undesired electrical influences that may occur in another section.

Isolation Transformer An Isolation Transformer uses isolated windings that physically separate the primary and secondary windings. Although the two windings are physically disconnected, the magnetic field in the windings of the primary creates (induces) electrical power in the secondary winding. In this way the electrical power available at the input can be transferred to the output. An isolation transformer does not transfer unwanted noise and transients from the input circuit to the output windings. This attenuation, or reduction in amplitude, could be as high as one million to one.