Always
O
n UPS Systems
M0703_NX_Series_Operators_Manual
V1.25
2012-06-12 3
2 INTRODUCTION
2.1 System
Description
The NX Series (UPS) continually monitors and provides conditioning to the incoming electrical
power removing surges, spikes, sags, over-voltages, and other irregularities that are inherent in
commercial utility power. This UPS system supplies clean, consistent power at the rated
voltage with low wave distortion to your sensitive electronic equipment. Blackouts, brownouts
and other power interruptions regardless of duration can be protected against with additional
optional battery cabinets to provide the necessary emergency power to safeguard your
operation.
Always
O
n UPS Systems Inc. believes that product reliability is first and foremost in acquiring
the confidence of the industry. Our Quality Control Standards ensures that testing at the
component level, board level, function level and completed stage level as specified by our
ISO9001 Certification allows us to gain this confidence and sets us apart as one of the leading
UPS manufacturers in this industry.
Always
O
n maintains reliability by incorporating conservatively rated components minimizing
transfers to bypass, which eliminates over working many components. Always
O
n provides a
truly isolated output (no common neutral from input to output) to eliminate all types of power
aberrations as well as Common and Normal Mode noise increasing the reliability and life of the
loads connected.
2.2 Definitions
UPS Module:
That portion of the UPS system which contains the rectifier/charger, inverter,
static bypass switch, maintenance bypass switch, controls, monitoring, and indicators.
Rectifier/Charger:
That portion of the UPS module, which converts the normal source AC
input power to DC power for the inverter input and for charging the battery.
Inverter:
That portion of the UPS module, which converts DC bus power to regulated and filter
AC power that is then supplied to the critical loads.
Static Bypass Switch:
That portion of the UPS module which automatically transfers the
critical loads, without interruption, from the inverter output to the bypass AC power source in
the event of an overload or degradation of the inverter’s performance.
Maintenance Bypass Switch:
That portion of the UPS module which is used to connect the
bypass AC power source to the critical loads while electrically isolating the static bypass switch,
rectifier/charger and inverter for maintenance purposes.
Battery:
The battery system provides DC power to the inverter input when the normal AC input
power to the UPS fails or in the event that the rectifier/charger failure.
Critical Loads:
These are loads that require clean, regulated and continuous AC power and
which are connected to the output of the UPS module.
