User manual

2-2
Ability to Transfer Select Loads Between Backup Sources
When the UTS is connected to both a generator and UPS, it can automatically transfer select loads between
the backup sources.This helps minimize power interruptions to the loads due to Generator or UPS
overloading.
Voltage Sensitivity
This feature allows you to determine how the UTS reacts to momentary power fluctuations. Sensitivity can
be set to
LOW, MEDIUM, or HIGH. The factory default is MEDIUM, which is suitable for most situations.
The
HIGH setting is only recommended when your loads are very sensitive to small, brief power
fluctuations. The
LOW setting is most useful for when you have frequent power fluctuations that do not
require intervention by the UTS.
Time Management and Load Shedding
Time management, in concert with load shedding, ensure that loads get the power they need. For load
shedding (load dropping), the UTS incorporates a patent-pending method called Adaptive Load
Management (ALM
TM
) that increases the capabilities of your backup sources. This method causes loads to
be dropped when the generator is in danger of an overload, and it reconnects the loads when sufficient
power is available. Thus, the most suitable individual loads are selected to shed (drop) or reconnect as
required, to minimize disruptions to your total load. When ALM is turned on over an extended period of
time (greater than 30 minutes), it can increase the operating efficiency of a typical generator by about 20%.
Also refer to the Adaptive Load Management (ALM) description.
Security Mode
Security mode is used when you go on vacation, or on an overnight trip. When SECURITY mode is set to
ON, the UTS automatically cycles power to circuits at the rate of two hours on, and two hours off. It is also
called "vacation mode".
Bypass Mode
In bypass mode, all circuits are powered by the primary utility power source only. Backup sources are not
used to power the loads, regardless of the status of the primary utility power source. However, overload
protection is provided. Bypass mode is covered in greater detail in Chapter 3.
LCD Alphanumeric Display
The liquid crystal display (LCD) is a two line alphanumeric display with 20 characters per line. During
initial setup and configuration, the LCD displays the particular setting or value that is to be entered or
changed. During regular operations, the LCD is used with the various LED indicators, and push buttons to
provide UTS informational status messages, warnings, and to perform required actions.
Automatic Start/Stop Operation
This feature is available for automatic start/stop generators, and provides the ability to start and stop the
generator remotely, with no human intervention. To operate in automatic mode, the generator requires
electric remote start/stop buttons, and an automatic choke. If you will be using an automatic start/stop
generator, you must order APC’s optional UTS Generator Hard Wiring Interface Kit (UTSHW), and UTS
Automatic Remote Start/Stop Kit (UTSREM) when you order your UTS.