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NetSure V200D50 DC Power Retrofit Installation & User Manual (UM486527803)
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Rev. F
15
c)
Output Fusing: Output fusing is provided in each Rectifier. If a fuse opens, local and remote Rectifier
Fail Alarms activate. This fusing is not customer replaceable.
d)
High Voltage Shutdown (Each Rectifier):
1.
Selective: If rectifier output voltage exceeds an adjustable preset value and is delivering more than
10% of its rated current, the rectifier shuts down.
After approximately 6 seconds, the rectifier automatically restarts. If rectifier output voltage again
exceeds the high voltage shutdown value within 5 minutes, the rectifier shuts down and locks out.
Manual restart is then required (by turning AC power off or removing the rectifier, then reapplying
AC power or reinserting the rectifier). If the rectifier does not experience a high voltage condition
within the 5 minute time period, the restart circuit is reset.
Only the rectifier causing the high voltage condition shuts down.
Setpoint is adjustable from 56.00 to 59.00 volts DC. Factory set at 57.50 volts, unless otherwise
specified. One adjustment at the MCA changes the setting of all Rectifiers.
2.
Backup: If rectifier output voltage exceeds a second (non-adjustable) value, the rectifier shuts down and
locks out regardless of load. Manual restart is then required. The backup HVSD setpoint is 59.5V
(within the range of 58.5 to 60V).
Output Current Walk-In:
a)
Normal Start:
•
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 ramp up period.
•
During the delay period the output voltage will be zero.
•
Start up time (AC on, till full power): < 5 seconds.
b)
Current Walk-In (if enabled via Controller):
•
90% load in > 8S, 100% load in < 124s.
•
According to Telcordia GR-947-CORE, R3-19.
Hot Swappable: Each 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.
NOTE!
The Retrofit Mounting Frame CANNOT be installed in or removed from the Power Bay unless all
Rectifiers are first removed from the Mounting Frame. Doing so will defeat the precharge circuit in the
rectifiers and cause arching and pitting on the DC power connector!
Cooling: Each rectifier contains one fan for front-to-back forced convection cooling.
Fan Control:
•
When input voltage is within normal range, the fan’s speed is controlled based on the internal
temperature of the rectifier.
