Considerations On Hvdc Power Supply - Inspur NF5260FM6 User Manual

Vibration resistance: withstands a sinusoidal vibration with a frequency

between 10 Hz to 55 Hz and amplitude of 0.35 mm.
Battery capacity: ensures the UPS backup time supports the power supply to

servers when the cabinet is fully loaded. The battery backup time should be 15
minutes if a diesel generator is used as the source of power supply.
Battery voltage: 2 V, 6V, or 12 V depending on the system capacity and backup

time.
The insulation monitoring device should act properly if a ground fault occurs

or the insulation resistance is lower than the set value of 28 kΩ. The HVDC
system should have automatic protection against overcurrent and short circuit,
and be restored to normal automatically or manually after the overcurrent or
short circuit is fixed.
Over- and under-voltage protection for AC power supplies: The power supply

system can monitor the input voltage changes. When the AC input voltage is
higher or lower than the specified threshold, the system automatically shuts
down. The system automatically restores when the input voltage returns to
normal.
The site must be free from explosives, mold, and conductive media and

hazardous gases that erode metals and affect insulation.
Overtemperature protection: When the PSU is operating at a temperature

exceeding the specified threshold, it should automatically reduce the power or
shut down. When the temperature falls below the threshold, the PSU should
restore to the normal power output.
The system should record and display alarms and allow users to query and

update them in real time. The alarm information should be retained after the
system is disconnected from the power supply.

11.10.6 Considerations on HVDC Power Supply

Terminal devices can be connected to power sockets or wiring terminals

(recommended).
Do not use a shunt circuit breaker to connect or control multiple PSUs through

a multi-purpose power socket.
Select a DC circuit breaker depending on the rated current of the device. 10 A

or 16 A DC circuit breaker is recommended.
Wiring: Connect the DC output positive pole to terminal L of the device input

power cable. Connect the DC output negative pole to terminal N of the device
input power cable. The DC system must not be grounded.
59