Specifications

40
1.877.297.6 937
GLOSSARY
Industry Terms
Alternating Current (AC)
The direction of an electric charge that is flowing in a circuit is constantly being
reversed back and forth.
Amp (ampere)
The standard unit of measure for electrical current, defined as the amount of
electrical flow equal to one coulomb per second.
Apparent Power
The product of the applied voltage and current in an AC circuit.
Blackout
A power failure in which line voltage drops to zero.
Brownout
A drop in voltage in electrical power supply.
Buck/Boost
Full automatic voltage regulation in a UPS stabilizes low voltage (boost) and
high voltage (buck) to maintain nominal 120V power, without resorting to battery
power when minor power fluctuations occur.
Coaxial Cable
Cables that are made of an inner conductor surrounded by an insulator and a
shield that are generally used for TV antennas, satellite dishes, cable modems
and certain computer networking applications.
Current
The flow of electric charge, measured in amps.
DHCP
Dynamic Host Configuration Protocol (DHCP), automatically assigns an IP
address to a device on a network.
Direct Current (DC)
The unidirectional flow of a electric charge.
Double-Conversion UPS
This high-end UPS system converts incoming utility AC power into DC power
and then back into AC power, charging connected devices with the UPS
battery. The isolated process ensures clean and stable output voltage and
zero transfer time. This UPS system is ideal for equipment sensitive to power
fluctuations such as corporate data centers, servers, and network and
storage devices.
Efficiency (Energy Conversion Efficiency)
The ratio between the amount of apparent power and the amount of true power
used by an electrical device. The closer the true power value is to the apparent
power, the more efficient the device.
Electromagnetic Interference (EMI)
Commonly referred to as line noise, these interference signals can disrupt
or degrade the performance of a circuit by inserting abnormalities into the
system. Also referred to as radio frequency interference (RFI) when in high
or radio frequency.
Frequency
The number of cycles in a given time period, which is measured in Hertz.
Ground
An electrical system connection that serves as a conduit between the circuit
and earth.
Half-Load
The midpoint in the maximum load capacity for a UPS.
Hard-wired
High amperage devices that require installation by a qualified electrician to be
directly wired-in, instead of simply being plugged in to an outlet.
Hertz (Hz)
The unit for frequency, defined as the number of cycles per second.
Hot-Swappable Battery
A term used to describe the functions of replacing a UPS battery without
shutting down the unit.
Joule
A measure of electrical energy — one joule is defined as the energy needed to
pass one ampere of current through one ohm of resistance.
Line-Interactive UPS
Functions the same as a standby UPS, with the additional feature of some
voltage regulation built in. It switches to battery power when voltage drops too
low, just as a standby UPS does, however if the voltage only drops slightly, a
line-interactive UPS corrects this without using battery power. The functionality
of these mid- to high-grade units falls between standby and online UPS units.
Load
The amount of power consumed by an electrical device on a circuit. Load
capacity is a critical factor in selecting a UPS or surge protector.
MOV
Metal Oxide Varistor is an electronic component that is used to protect circuits
against excessive, short-lived, voltages.
Nominal Voltage
The standard voltage for a circuit or system. Common nominal voltages in the
U.S. includes 120VAC, 208VAC and 240VAC.
Overvoltage
This occurs when incoming voltage is higher than normal but not high enough
to be classified as a surge.
Power Factor (PF)
The ratio of real power (watts) to apparent power (VA), expressed as a number
between 0 and 1. Watts divided by VA = Power Factor
Power Factor Correction
Controls the incoming power to a power supply in order to bring the power
factor as close to unity power as possible.
Radio Frequency Interference (RFI)
See Electromagnetic Interference.
Real Power
The amount of power being drawn by a system, measured in watts. Real power
is a function of VA (apparent power) and the power factor.
RJ11, RJ14, RJ45
The abbreviation of registered jack (RJ) – RJ11 is for standard phone lines, RJ14
is for multiple phone lines and RJ45 is for Ethernet.
Runtime
The maximum period of time battery power is output from a UPS to its
connected devices during a power interruption. Runtime is dependent upon the
total load of all connected equipment.