3.3.09.3 Auto test - units with High Output Alarm feature:
AUTO TEST automatically ramps the unit's output to simulate a manual test. The auto process
starts with the output voltage at the programmed equalize level. This voltage is then decreased until
an under voltage alarm is generated. The output voltage and the low voltage alarm condition are
displayed simultaneously. After a three second hold period the voltage ramps up until the upper
level for the low voltage alarm is reached. The upper level is the lower level plus a hysterisis volt
-
age (3 volts for a 48 volt system and 1.5 volts for a 24 volt system). After another 3 second hold
period the alarm message disappears and resumes an upward ramp up until the high output alarm
is activated. The message HIGH O/P VOLTAGE will be displayed simultaneously with the level. Af
-
ter a 3 second hold period, the voltage ramps down until the lower level for the high voltage alarm
is reached. The lower level is the upper level minus a hysteresis voltage (1.0V for 48V systems and
0.5V for 24V systems). After another 3 second period, the alarm message disappears and starts an
upward ramp until the high voltage shutdown circuit is activated. The message O/P H.V. SHUT
-
DOWN will be displayed simultaneously with the level. This level is held for three seconds before
the unit exits out to the main menu for the test mode. The H.V. shutdown does not require manual
reset as it will restart automatically. AUTO TEST is aborted if the output breaker is closed during
the process. When the mode is exited the module will return to the previous output mode ie.
FLOAT.
3.3.10 Alarms
System alarms work on several levels. Specific to the shelf only is the group A.C. fail alarm. If A.C.
is removed from one of the modules at the terminal block the contact will energize. Extended from
each module is an individual module fail contact which is extended whenever a module enters a fail
condition. The following conditions will generate a Module fail alarm:
Output High Voltage Shutdown
A.C. Mains Failure
A.C. Mains High
Input Circuit Breaker Open
Output Circuit Breaker Open
Remote Shutdown
Start Delay On
Over Temperature Shutdown
Micro-Controller Fail & Output Current 5%
Fan Fail, Thermal Foldback + O/P Current 50%
No Output Power
A minor alarm from any of the modules de-energizes (since the normal state is energized) the
shelf's minor alarm contact. Visual indication of the alarms is active during all modes of operation
and is displayed on the front panel LCD. A minor alarm on a module will be inhibited if there is a si
-
multaneous module fail condition. If one module is in general fail and the other is in module, fail the
alarm will be extended. The following conditions will generate a minor alarm:
Low Output Voltage
High Output Voltage
Over Temperature
Fan Fail
Test Mode
Adjust Mode
Remote Mode
Temperature Sensor Failure
UPF High Temperature
010-030-C0 Rev E Page 8 of 42 ARGUS TECHNOLOGIES
To Next Page
Loading...