Vertiv NetSure 731 C62 Series User Manual page 68

Vertiv™ NetSure™ 731 C62 Series Power System User Manual
Figure 5.4 Output power and temperature
Output current limiting adjustment
The maximum current of the rectifier can range from 10% to 120% of the full load through the controller programming.
If the controller communication fails, the default rectifier current is 100% of the full load rated power. The full load
rectifier is defined as the maximum available current (62.5A) in the output load range. The rectifier can start as long as
connected to a fully discharged battery or capacitor bank. There is no need to run the rectifier protection device,
manual intervention is also unnecessary.
Output voltage regulation
Nominal output voltage: -48V DC, positive earthing. Adjustable within the range: -42V from -58V. User can regulate the
range through the controller, regulation precision is ± 0.1V.
Fan control
When the input voltage is in the normal range, the in-built processor will regulate the fan speed (stepless regulation)
according to the internal temperature and output power of the rectifier. For example, the fan speed increases with the
rectifier temperature or the output power. The rectifier can be set to full speed through the corresponding controller.
Input over/under voltage protection
When the input voltage is less than 80Vac, the yellow indicator will be on, and the rectifier will stop working. When the
input voltage returns to the normal range, the rectifier will automatically work in normal state. Low input voltage will
not trigger the corresponding input protection device.
When the input voltage exceeds 305Vac, the yellow indicator will be on, and the rectifier will stop working. When the
input voltage returns to the normal range, the rectifier will automatically work in normal state.
The rectifier will report the event to the controller when overvoltage protection occurs.
Output overvoltage protection
1. The SW overvoltage protection point can be set through the controller; the setting range is 56V ~ 59V. It should be
0.5V higher than output voltage, and the default value is 59V.
The SW overvoltage protection mode can be selected through the controller:
1) Lock out at the first overvoltage
Once the output voltage reaches software protection point, the rectifier will shut down and hold that state. it requires
manual resetting to restore the operation
4