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SC300 Handbook
58
Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.
IPN 997-00012-03 B2 Issue B2 July 2018
Nominal AC
Voltage
Used by the AC Phase 1/2/3 Fail and AC Phase
1/2/3 Voltage alarms.
SC300: Alarms > Alarm
Settings (tab)
Web: Alarms > Alarm
Configuration > AC Alarm
Thresholds
The following system alarms have particular configuration settings:
•
System Overload / System Overload B alarm. See details on page 58.
•
Battery Mid-point monitoring. See details on page 70.
Alarm Inhibiting
To prevent a single series of faults triggering multiple alarms, an alarm is inhibited by another
active alarm if the conditions that trigger the inhibiting alarm include the conditions that trigger
the inhibited alarm. However, the inhibiting alarm only inhibits if it is set to a level of severity that
is equal to or higher than the alarm being inhibited.
For example,
Partial AC Fail
is inhibited if
AC Fail
is active and
AC Fail
is set to a level of severity
that is equal to or higher than
Partial AC Fail
.
Alarm Descriptions on page 133 lists the inhibiting alarms that can inhibit each alarm.
System Overload Alarms
The System Overload and System Overload B alarms activate if the total system load exceeds a
percentage of the installed rectifier capacity for a specified period, or if the total system load
exceeds a percentage of the installed rectifier capacity minus the capacity of the largest one or two
rectifiers if
System Overload Type
is set to
Redundancy N Plus 1 or N Plus 2
. This indicates that
additional rectifiers need to be installed. This is useful at sites where there is ongoing installation of
additional load equipment.
► To enable System Overload
•
From DCTools/ Web go to:
Alarms
>
Alarm States
. Enable and configure
System Overload
(or
System Overload B) alarm. See System Alarm Configuration on page 57.
•
Go to:
Alarms
>
Alarm Configuration
. Configure the
System Overload
alarm parameters. See
details on page 59.
Information
The following information is available about System Overload.
Parameter
Description
Where to find:
System Power
The output power of the system as a percentage
of the total nominal power the system is capable
of supplying.
SC300: Analogs
DCTools/ Web: Analog
Inputs