Alpha Technologies Cordex HP 48 1.2kW, Technical Manual

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010-619-J0 Rev B Page 7
3 Features
3.1 Rectifier
The Cordex CXRF-HP series of 48V 1.2kW rectifier modules employ high frequency, switch mode tech-
nology featuring high power conversion efficiency. All internal semiconductor devices operate under
“soft-switching” conditions and exhibit very low power loss. The reduced power loss leads to lower
thermal stress on the semiconductors and thus improves reliability.
Sustaining low component temperatures is again the primary factor with meeting the three worst-case
field scenarios: (1) 65°C ambient temperatures, (2) full output power, and (3) low AC input (176Vac).
While meeting these specifications, Cordex rectifiers also offer roughly twice the reliability at 55°C and
up to four times more at 45°C ambient temperature.
3.1.1 Rectifier Front Panel
Figure 4: Rectifier Front Panel
3.1.2 LEDs
The front panel LEDs provide rectifier status summary and help to locate a specific module with the
controller.
AC
The top LED (green) is on when AC is within valid range and the rectifier is delivering power to the load.
The LED will flash (~2Hz) when AC is outside the nominal range – AC voltage is invalid if the AC Mains
Low or AC Mains High alarm is active. The LED turns off when AC has failed (or no AC power is
present).
DC
The middle LED (green) is on when the rectifier is delivering power to the load. The LED turns off when
the rectifier is off; e.g., when commanded via the controller.
Alarm
The bottom LED (red) is on continuously in the event of an active Module Fail alarm. The LED flashes
(~2Hz) when a minor alarm is detected. The LED remains off in the absence of an alarm. If the unit
output is not connected to a battery or parallel rectifier, the LED extinguishes if no AC power is present.
LED Activity During “Locate Module” Command from Controller