Eaton EFX48 e-Fuse Series, Installation And Operation Manual

Page: 113 / 161

EFX48 e-Fuse System Operation
Copyright © 2019 Eaton Corporation. All Rights Reserved.
IPN March 2019
113
System Volt sense warning alarm
Alarm trigger If rectifier(s) are reporting bus voltage(s) , then if the SDU reported
voltage is more than +/- 2V from the mean reported voltage(s)
activate the system voltage sensor fail alarm
Alarm cancel The alarm is cancelled when the condition are no longer true
Action required If this alarm does not self-clear clear then the EFX48 needs to be
replaced
Battery alarms
String trip alarm
Alarm trigger If at any time any string output enters the tripped state then the string
trip alarm is raised
Alarm cancel The string trip alarm is cancelled by no trip condition existing
Action required Turn the string off and on again. Note that the string may enter the
‘pending’ state with its LED flashing at 1Hz whilst the EFX48
determines whether the conditions are correct for reconnecting the
string
If the string continues to trip after a restart then the connections
should be checked for short circuits etc.
String fail alarm
Alarm trigger If at any time any string output has been turned off but the string
current is greater than +/-3A
Alarm cancel The string e-fuse fail alarm is cancelled when all the string outputs
return to being not in the failed state
Action required If this alarm does not self-clear then the EFX48 needs to be replaced
String low alarm
Alarm trigger If at any time any string is pending and the string voltage is less than
the LVD disconnection voltage then the string low alarm will be
raised
Alarm cancel The string low alarm is cancelled by turning off the appropriate
string(s) or the voltage rising to be greater than LVD disconnection
voltage
Midpoint alarm
Alarm trigger If after the system has been in the float state for the midpoint dwell
time and midpoint monitoring is enabled and the measured mid-point
voltage is outside of the set threshold limits continuously for greater
than the set mid-point delay period then the midpoint alarm is raised
Alarm cancel
The midpoint fail alarm is cleared when the mid-point voltage returns
to within the threshold limits for longer than the midpoint delay time
Action required If this alarm does not self-clear clear then the midpoint connection to
the battery string needs to be checked
If this alarm is still active after the connection is checked then the
EFX48 needs to be replaced
Battery temp high/low alarm
Alarm trigger If at any time the temperature reported from the external temperature
sensor is greater or lower that the set limits then the battery temp
high/low alarm is raised
Alarm cancel The battery temp high/low alarm is cleared when the reported
temperature returns to within the specified limits
Batt disc alarm
Alarm trigger If at any time all strings are disconnected for any reason other than