EC500 Controller Handbook
Copyright © 2019 Eaton Corporation. All Rights Reserved.
Issue A March 2019
Page 45 of 107
DCDB ALARMS
Alarm
Description
Where to find:
DC Overload
This alarm is generated when System Current
(Summation of load and all battery current) exceeds
the System Overload Alarm Threshold (Normally
105% of System Capacity) for the duration of 10
seconds.
This Alarm will be latched if System Overload Alarm
Latch Enable is “Set”
.
Display:
Menu>Setting>DC Settings>
Alarm Settings
Web:
Home>Setting>DC Settings>
Alarm Settings
DC Over Voltage
This alarm is generated when Bus Voltage exceeds
the DC Over Voltage Alarm Threshold for duration of
10 seconds.
This Alarm will be latched if DC Over Voltage Alarm
Latch Enable is set.
DC Low Voltage
This alarm is generated when Bus Voltage becomes
lower than DC Voltage Low Alarm Threshold and
more than 30V for the duration of 5 seconds.
LLVD Disconnect
This alarm is generated when Bus Voltage becomes
lower than DC Under Voltage Alarm Threshold and
more than 30V for the duration of 5 seconds. These
alarm thresholds can have different values for all 4
channels.
This alarm also triggers the Load Contactor for Load
LVD operation with no delay.
ALARMS
EC500 provides a number of alarms to indicate any abnormal system condition to the user. The EC500 is
supplied with a standard configuration file has a default set of alarms configured and enabled. This will be
sufficient for standard dc power system operation.
For specific alarm arrangements all EC500 alarms can be individually enabled or disabled and are configurable.
TYPE OF ALARMS
EC500 provides following four type of alarms:
Alarm Type
Description
Configuration:
System Alarms
Generated by the operating values of dc power
system (voltages, currents, temperatures, and so
on), operation of power system modules (rectifiers,
circuit breakers, fuses, and so on) and
communication alarms. The EC500 system alarms
are listed in Alarm Descriptions on page 97.
See details on page 47.
Analog Alarms
Activated when the result of Analog compare logic is
active.
See details on page 49.
Potential Free /
Digital Input Alarms
Activated when mapped PFC / DI is in its active
state.
See details on page 48.
