AC Efficiency

AC Efficiency

The ratio of the output power from the UPS to the input power from the AC utility in Line mode.

THDi

THDi

THDi stands for the Total Harmonic Distortion of the input current waveform. It is generally accepted that the THDi should be kept low to avoid excessive current distortion at the point of common coupling within a building due to the cumulative effect of all connected equipment.

RS232

RS232

A serial communication protocol. It may be used between a UPS and a computer to communicate alarm, status or control signals and instructions.

Manual Bypass Switch

Manual Bypass Switch

A manually operated transfer switch used to bypass the major electronics in the UPS. When it is enabled then the service engineer can have the repair service without power interruption.