EC500 Controller Handbook
Copyright © 2019 Eaton Corporation. All Rights Reserved.
Issue A March 2019
Page 98 of 107
Rack Fan Fail
The fan tacho signal is sampled at the rate of 20us and averaged for 65536
samples. If averaged value is less than 0.3V and greater than 2.57V for 13
seconds continuously, then fan fail will be activated. EC500 activates this
after receiving it from rectifier for 17 seconds.
Rec Proc Mode
This alarm is generated in the rectifier with a delay of 10ms (one AC cycle)
when input Mains frequency of rectifier less than 44Hz and greater than
66Hz. EC500 receives this and wait for 60 seconds to activate this alarm.
System Overload
This alarm is generated when system current (summation of load and all
battery current) exceed 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”.
DC Over Voltage
This alarm is generated when bus voltage exceed the DC Overvoltage Alarm
Threshold for the duration of 10 seconds.
This alarm will be latched if DC Overvoltage alarm Latch Enable is set.
DC Low Voltage
This alarm is generated when Bus voltages becomes lower than the DC
Voltage Low Alarm Threshold and more than 30V for the duration of 5
seconds.
LLVD-n Disconnect
The alarm is generated by EC500 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 be different value for all n channels.
BLVD Disconnect
This alarm is generated by EC500 when Bus voltage becomes lower than
Battery Low Voltage Disconnect (BLVD) Alarm threshold and more than 30V
for the duration of 5 seconds.
This alarm also triggers the battery contactors for battery LVD operation with
no delay.
Batt Bank Dischg.
This alarm is generated when any battery current becomes lower than the
Battery Discharge Current Threshold (1%) in percentage of Battery Capacity
and Bus Voltage also becomes lower than Battery Discharge Voltage Alarm
Threshold (52V) for the duration of 15 seconds.
MBD (Mains ON Batt
Dischg.)
This alarm is generated when Battery Bank Discharge Alarm present and
Mains Fail alarm is not present or in other words if at-least one phase is OK
for duration of 120 seconds.
Temp Comp CBL Fail
Temperature Compensation Cable Fail alarm is generated when Battery
Temperature becomes less than -25°C for the duration of 10 seconds.
Batt n Reverse
This alarm is generated when the Battery Voltage becomes lower than
-20V for the duration of 10 seconds.
Batt n Fuse Fail
This alarm is generated when any of the below mentioned condition is
present for the duration of 10 seconds:
1.
Bus Voltage is more than the addition value of Battery Voltage and
Battery Fuse Fail Alarm Threshold.
2.
Bus Voltage is less than the subtraction value of Battery Voltage and
Battery Fuse Fail Alarm Threshold.
Batt n Not Present
This alarm is generated when Bus Voltage is less than 20V for the duration of
10 seconds.
Rack Temp1 Low
This alarm is generated when Rack Temperature 1 becomes lower than Rack
Temperature 1 Low Alarm Threshold for the duration of 10 seconds.