Vertiv | NetSure Rectifier Module User Manual (UM1R483500e) | Rev. R
• Over-Temperature Protection: The rectifier provides over temperature protection by derating output
power and recovers automatically.
• Active Load Sharing: The rectifier uses advanced digital active load sharing technology that maintains
balancing to within 3 % of rated current.
• 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.
• High Temperature Alarm: Each rectifier continuously monitors the ambient temperature surrounding
the power conversion circuit. If this temperature exceeds a preset non-adjustable value, local and
extended rectifier Fail alarms are activated. The alarms will automatically be removed when the ambient
temperature surrounding the power conversion circuit decreases to below a preset non-adjustable
value.
• Cooling: Each rectifier contains a fan for front-to-back force air-cooling.
a) Fan Fault Protection: The rectifier shuts down and its alarm indicator (red) flashes if the 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 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.
• Paralleling: This rectifier may be connected in parallel with any rectifier of the same polarity and
adjusted to the same output voltage.
• Output Current Walk-In:
a) Normal Start:
1. Start up time, defined as beginning at AC switch on and ending when full output power has
been reached, consists of two time intervals, the delay period and the output voltage rampup
period.
2. During the delay period the output voltage will be zero.
3. Start up time (AC on, till full power): ≤ 5 seconds.
4. Output voltage ramp up period, t: 50 ms ≤ t ≤ 150 ms. (10 % to 90 % of full power)
5. The rectifier will not suffer any damage, when subjected to repetitive AC switch on / switch off
operations.
b) Current Walk-In (if enabled via controller):
1. 90 % load in > 8 S, 100 % load in < 124 s.
2. According to Telcordia GR-947-CORE, R3-19.
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