EC500 Controller Handbook
Copyright © 2019 Eaton Corporation. All Rights Reserved.
Issue A March 2019
Page 42 of 107
Alarm
Description
Where to find:
or 2) while scanning all rectifier
’s on a phase, e
ven if
1 or more rectifiers has communication established
with MCM, the remaining rectifiers on that phase
are declared “Fail”, provided they are not
communicating
Rec Comm Fail is generated whenever rectifier does
not respond to MCM request to communicate
within 60ms then “Rec Comm Fail” is generated and
when this happens to all the installed rectifiers then
“All Rec Comm Fail” is generated
.
All Rec Current
Limit
The “Rec Curr Limit” alarm is generated by the
rectifier when the control loop switches from
constant voltage to constant current mode and
output voltage drops by 1V compared to previously
measured voltage.
Rectifier Internal
Alarm
This alarm contains the rectifier’s internal alarms i.e.
SMR Fan fail, SMR EEPPROM fail etc.
Rec Proc Mode (FA) This alarm is generated by the rectifier when the
input frequency is <44 Hz and greater than 66 Hz for
10 ms.
Rec Proc Mode (FS) This alarm gets generated in the rectifier by
following two conditions 1)Mains voltage > 330V
upon detection time of 10 ms 2) Input voltage >
460V for 32 samples (640 uS).
Rec Proc Mode
“Rec IP proc Mode (Set)” alarm is generated by the
rectifier when the input voltage fluctuates more
than 3 times within the time period of 90 seconds.
LOW VOLTAGE DISCONNECT (LVD)
The controller continuously monitors system bus and battery voltages. It can generate system alarms and Low
Voltage Disconnect signals for protecting battery and loads.
The system can also generate pre-disconnect warnings.
The controller supports one Battery Low Voltage Disconnect and up to four Load Low Voltage Disconnects.
Low Voltage Disconnect has two purposes:
•
to protect a VRLA battery from deep discharge and premature failure, and/or
•
to reduce the load on a battery under discharge so that high priority equipment operates for
a longer time after an AC supply failure.
In case multiple battery contactor drives are required same can be mapped. Please see Configuration on page
43
Error! Bookmark not defined.
. All battery contactors use the same disconnect and reconnect thresholds.
BUS MONITORING
The following thresholds can be set to generate alarms whenever the system bus is lower / higher than these
thresholds:-
