Vertiv
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eSure™ Rectifier Module User Manual (UM1R482000e3)
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Rev. M
15
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Cooling: Each rectifier module contains a fan for front-to-back force air-cooling.
a)
Fan Fault Protection: The rectifier module shuts down and its alarm indicator (red) flashes if the fan
fails. Fan failure is detected and reported to controller. The fan is field replaceable.
b)
Fan Control: Fan speed is continuously variable. When input voltage is within normal range, the
built-in processor adjusts fan speed according to the rectifier module’s internal temperature and
output power. For example, a higher temperature or output power increases the fan speed. This
feature can be disabled via the controller, allowing the fan to run at full speed regardless of
temperature.
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Paralleling: Up to 32 rectifiers can be connected in parallel in one system.
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Communication Failure: The rectifier’s protection indicator (yellow) will flash should it experience a
communication failure. The failure information will be reported to the controller and the controller will
process the failure accordingly. During a communication failure, in order to protect the battery, the
rectifier output voltage will automatically be adjusted as follows.
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The rectifier default factory output voltage is 53.5V.
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Once power is applied to the rectifier and the rectifier is recognized by the controller, the output
voltage is updated to the setting programmed into the controller.
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If communications with an SCU+ controller is lost, rectifier output voltage goes to a default value
programmed into the controller (this is a separate programmable parameter from the output voltage
setting).
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If communications with an ACU+ or NCU controller is lost, rectifier output voltage goes to the last
communicated float output voltage setting in the controller (the last communicated float output
voltage setting is stored in the rectifier).
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The rectifier will revert to normal operation once normal communication to the controller is restored.
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Rectifier Output Current Imbalance:
a)
When the average current of all rectifiers is greater than 20% of full rated current, and the difference
between local rectifier current and average current is greater than 16% of full rated current, the
yellow protection indicator will illuminate.
b)
When the average current of all rectifiers is greater than 10% of full rated current, and local rectifier
current is less than 2% of full rated current, then the red fault indicator will illuminate.
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Monitoring Function: The rectifier has a built-in advanced DSP that monitors and controls the operation
of the rectifier. The DSP also communicates with the controller in real time through the CAN bus.
lists the different commands and information exchanged between the rectifier and the controller.
