0922001-J0 Rev A
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User GuideCordex® CXPS-E105 Edge Power Systems
Start delay
The rectifier modules are equipped with a delay timer in order to stagger start a series of modules to prevent
excessive loading of generators upon start up. The built-in timer delays the turn on of the module depending on
the value selected (up to 120 seconds) via the controller. A minimum one-second delay is preset to allow charging
of the input capacitors.
Current limit/short circuit protection
The current limit function determines the maximum output current limit of the rectifier module, regardless of
output voltage or power. Maximum output current is limited to a constant value down to short circuit condition.
Current limiting can be used to mate the rectifier output current ampacity to the needs of the load and parallel
battery to minimize excessive battery recharge current.
The rectifier will sustain a continuous short circuit at the output terminals. The maximum short circuit current will
not exceed 50 amps (Cordex® HP 2.4 kW rectifiers) or 62.5 amps (Cordex® HP 3.0 kW rectifiers) per module.
Power limiting
Each rectifier module is designed to limit power output to the module specification. This enables more current
to be supplied at lower output voltages, and allows matching of output to the demand of constant power loads,
normally seen with Telecom equipment.
This feature may also be used for a faster recharge of flooded batteries paralleled with the load.
High voltage shutdown
The high voltage shutdown (HVSD) feature provides protection to the load from over voltage conditions
originating from the rectifiers. It operates by shutting down the oending rectifier module when a high
output voltage condition occurs. Indication is through the red alarm (Module Fail) LED. Modules will restart
automatically; however, if more than three over voltage conditions occur in one minute, the module will latch o
and remain shut down until it is reset.
Battery eliminator operation
Rectifier modules maintain all specifications (except where indicated) with or without a battery attached in parallel
to the output; however, if a battery or another module supplying DC voltage in parallel is not present, there will be
no monitoring or control activity if there is an AC power failure or input fuse failure.
NOTICE
Under normal conditions, a battery connected to the output of the rectifier will draw current
when the voltage ramp occurs. Therefore the rectifier fail alarm will not be generated with a
battery connected.
NOTICE
Current limiting overrides the power-limiting feature.
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