A

Advanced Battery Management A three-stage charging system designed to prolong the service life of UPS batteries. By charging the batteries only when necessary, battery life is significantly improved. Charging stage one: quickly recharges battery to approximately 90% of capacity. Charging stage two: fully charges the battery to 100%. Charging stage three: rest mode prevents overcharging. Charging stage one is initiated after a power outage or periodic UPS self-test.

AC Alternating Current electrical power supplied by a utility company or from an AC generator.

AC Distribution A module in the power system that distributes AC power to other power system modules.

AC Metering Measurement of AC power input voltage and current parameters by sampling. The results of the measurements are used to calculate the rms (Route Mean Squared) equivalents for voltage, current and power, and also calculate the power factor and frequency.

AC Utility The electric power furnished by an electric power utility company.

Active Load Share A current sharing scheme controlled by the supervisory module that adjusts the output voltage of individual rectifiers so that all rectifiers in a DC power system produce the same output current.

Active Voltage Control The supervisory module adjusts the rectifier output voltages to maintain a constant DC power system voltage (measured at the output or battery) independent of load fluctuations during normal operation.

Agent A software program that acts as a focal point for data collection and configuration of a specific network entity (hardware or software). SNMP agents provide data to management stations regarding the operation and configuration of devices on a network.

Alternating Current (AC) Current which changes (or alternates) direction at regular intervals. Since the current flows in one direction for the same amount of time that it flows in the opposite direction, the average value of the current flow is zero.

Ampere (Amp or A) The unit of measure for current. One ampere is the amount of electricity per second that flows through a conductor such as a wire.

AVC Active Voltage Control