68
-
The server is directly powered by the mains supply, and the power supply
voltage exceeds the rated voltage by -10% to +10% or the voltage range
allowed for the server.
-
The server is not directly powered by the mains supply, and the mains
voltage exceeds the rated voltage by -10% to +10% or the AC input voltage
range allowed for the DC power equipment.
To prevent interruption or surge of AC power supply, use the UPS or inverter.
The data center should be equipped with self-supplied generator set in case of
mains failure to ensure proper function of important load and important power
load. All electrical equipment such as IT equipment and refrigeration
equipment shall be considered. Check the start-up shock to ensure that the
generator can start reliably. The generator performance should meet the
requirements of Code for Design of Data Centers (GB50174).
Connect two storage battery strings in parallel. A second UPS is needed as
redundant backup.
8.10.4
HVDC Power Supply
The high-voltage direct current (HVDC) system can eliminate the problems existing
in conventional AC and low-voltage DC power supplies. At present, 240 V HVDC
standards and 336 V HVDC standards are the mainstream HVDC standards used in
China.
8.10.5
HVDC Power Supply Requirements
The requirements for HVDC power supply are as follows:
-
Operating range: -5
℃
to 45
℃
(23
°
F to 113
°
F)
-
Storage and transportation range: -40
℃
to 45
℃
(-40
°
F to 113
°
F)
Relative Humidity:
-
Operating range: ≤ 90
％
RH (40±2
℃
)
-
Storage and transportation range: ≤95
％
RH (40±2
℃
)
Vibration performance: ability to withstand sinusoidal frequencies between 10
Hz to 55 Hz and amplitude of 0.35 mm.
Battery capacity configuration: Ensure continuous operation of servers at full
loads when the power supplies are unavailable. The battery backup time
should be 15 minutes when a diesel generator is available as backup power
source.
