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NetSure Rectifier Module User Manual (UM1R243000 / 11BJ1307WA)
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Rev. G
14
the HVSD restart timer expires, the rectifier shuts down and locks out. Manual restart is then
required (by turning power to the rectifier off or by removing the rectifier, waiting until the LEDs
on the rectifier extinguish, then turning power to the rectifier on or re-inserting the rectifier).
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Over-Temperature Protection: The rectifier provides over temperature protection by derating output
power and recovers automatically.
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Hot Swappable: The rectifier is designed to be plug-and-play. The rectifier can be inserted or removed
from a live DC power system with no damage. When the rectifier is plugged into the system, the system
output voltage will not be affected.
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Power Factor Correction Failure: If the power factor correction circuit fails and results in over/low DC
bus voltage, the rectifier shuts down and its protection indicator (yellow) illuminates.
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Rectifier Module DC/DC Converter Failure: If the rectifier’s DC/DC converter fails, the rectifier shuts
down and the fault indicator (red) illuminates.
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Rectifier Module Load Sharing (per Bay): The rectifier shares load with other like rectifiers operating in
parallel on one CAN communications bus to within ±3% of the ratings of the rectifiers when between
10%~100% load (maximum 28 rectifiers).
If R24-2500 and R24-3000 rectifiers are operating in the same system, they will share load at the ratio of
their output power ratings.
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Startup Time: The rectifier has two startup modes.
a)
Normal Startup:
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Start up time, defined as beginning at AC input being applied and ending when full output
power has been reached, consists of two time intervals, the delay period and the output voltage
ramp up period.
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During the delay period the output voltage will be zero.
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Start up time (from AC on until full power): ≤ 5 seconds.
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Output voltage ramp up period, t: 50 ≤ t ≤ 150 ms. (10% to 90% of full power) (if walk-in feature
is disabled).
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The rise time is retained with a DC load of 0.31 Ohm (+24.0VDC & 87.7A).
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The rectifier will not suffer any damage when subjected to repetitive AC voltage on / off
operations.
b)
Output Voltage Walk-In: Meets Telcordia GR-947-CORE, R3-19. Output voltage gradually increases
after AC service is supplied or restored. Ramp-up time is settable via the controller. The controller
can enable/disable this feature.
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Cooling: Each rectifier contains two fans for forced convection cooling.
a)
Fan Fault Protection: The rectifier shuts down and its fault indicator (red) flashes if either fan fails.
Fan failure is detected and reported to controller. The fans are 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’s internal temperature and output
power. For example, a higher temperature or output power increases the fan speed. Fan speed
control can be disabled by the controller.