Alpha Cordex HP CXRF 48-2.4kW, Manual

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0100037-J0 Rev D 18
User Guide Cordex HP 2.4kW / 3.0kW Modular Switched Mode Rectifier
4.2 Cordex HP 2.4kW rectifier
4.2.1 Front panel LEDs
The front panel LEDs indicate the rectifier status summary and patterned response to Locate Module command.
Alarm/Fault
The red LED is on during an active Module Fail alarm if the module is unable
to source power due to a fault condition. Refer to the relevant controller
manual for fault details.
The LED flashes (~2Hz) when a minor alarm is detected if the module's output
capability has been reduced or a minor failure is detected.
The red LED will remain active if the module is receiving power from the DC
bus.
DC ON
The green LED is on when the rectifier is delivering power to the load. The
LED goes out when the rectifier is off. For example, when commanded by the
controller.
AC ON
The green LED is on when the AC input voltage is qualified and within the
operational AC input range and input frequency.
LED activity during the Locate Module command from controller
The Locate Module command from the controller, causes the LEDs of the target rectifier to flash in a cyclical
pattern. This flashing normally lasts 60 seconds.
LED activity during power save
When a rectifier is put into power save mode, only the AC ON LED remains illuminated.
4.2.2 Rectifier rear panel
Refer to drawings at the end of this manual for shelf power and communications connections (compatible with
2.4kW and 3.0kW rectifiers):
• 0300057-08
• 0300040-08
4.2.3 True module fail alarm
The power modules have a “true” fail alarm that provides a true indication of the power module’s ability to source
current. When the module’s output current drops below 2.5 percent of the rated output, a low output current
condition is detected and the Module Fail detection circuit is activated. This circuit momentarily ramps up the
output voltage to determine if the module will source current. If no increase in current is detected, the
Module Fail
alarm is activated. The module will test once every 60 seconds for the condition until a current is detected. The
output voltage ramping ceases upon detection of current. A minimum 2.5 percent load is required to avoid the
Ramp Test Fail alarm. This load can be provided with the parallel system battery. Activation of this alarm could
indicate a failed module or a failed load.
To avoid nuisance alarms for Cordex rectifier systems without batteries, or with a very light load (below 2.5
percent of the rated output), the ramp test should be disabled. Disable the Ramp Test via the controller menu:
System > DC System > Inventory > Rectifiers > Configuration
.
4.2.4 Heat dissipation
Each rectifier module is equipped with a front-mounted, variable-speed fan. The fan speed is determined based
on ambient temperature, rectifier temperature and the load. Air flow is front-to-rear with the exhaust air exiting
through internal vents at the rear of the unit.